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Morphology-optimized ZnSnO3 nanopentagons as efficient electron transport layers for high-efficient perovskite solar cells
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-13 DOI: 10.1016/j.jssc.2025.125322
Sahaya Dennish Babu George , Karthikeyan Nagarajan , Ayeshamariam Abbas Ali , Swetha Madamala , Dhinesh Subramanian , Sarojini Kuppamuthu , Judith Jayarani Arockiasamy
Ternary metal oxides with high optical transparency and wide bandgap semiconductors have gained significant attention as promising candidates for various optoelectronic device applications. In this study, ZnSnO3 nanomaterials, synthesized in distinct nanopentagon and spherical nanoparticle morphologies, were prepared using hydrothermal and microwave-assisted synthesis methods. Structural analysis through X-ray diffraction (XRD) confirmed the perovskite phase of ZnSnO3. Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) revealed distinct morphological variations, while Energy Dispersive Spectroscopy (EDS) mapping validated the stoichiometric composition. X-ray Photoelectron Spectroscopy (XPS) further confirmed the oxidation states of Zn2+, Sn4+, and O2−. Optical studies from Ultraviolet–visible spectroscopy (UV–Vis) revealed bandgap values of 3.64 eV and 3.66 eV for ZnSnO3 synthesized via hydrothermal and microwave methods, respectively. To evaluate their performance in optoelectronic applications, ZnSnO3-based electron transport layers (ETLs) were incorporated into an FTO/ZnSnO3/CH3NH3PbI3/Spiro-MeOTAD/Au perovskite solar cell architecture. Notably, hydrothermally synthesized ZnSnO3 nanopentagon ETLs achieved a power conversion efficiency (PCE) of 17.73 %, outperforming the 14.28 % PCE obtained with microwave-synthesized spherical nanoparticles. This study underscores the potential of ZnSnO3-based ETLs for highly efficient perovskite solar cells (PSCs), emphasizing the impact of synthesis methods on device performance. By demonstrating the viability of ZnSnO3 nanomaterials in advanced optoelectronic applications, this work lays the groundwork for further optimization and development of high-performance devices leveraging ternary metal oxides.
{"title":"Morphology-optimized ZnSnO3 nanopentagons as efficient electron transport layers for high-efficient perovskite solar cells","authors":"Sahaya Dennish Babu George ,&nbsp;Karthikeyan Nagarajan ,&nbsp;Ayeshamariam Abbas Ali ,&nbsp;Swetha Madamala ,&nbsp;Dhinesh Subramanian ,&nbsp;Sarojini Kuppamuthu ,&nbsp;Judith Jayarani Arockiasamy","doi":"10.1016/j.jssc.2025.125322","DOIUrl":"10.1016/j.jssc.2025.125322","url":null,"abstract":"<div><div>Ternary metal oxides with high optical transparency and wide bandgap semiconductors have gained significant attention as promising candidates for various optoelectronic device applications. In this study, ZnSnO<sub>3</sub> nanomaterials, synthesized in distinct nanopentagon and spherical nanoparticle morphologies, were prepared using hydrothermal and microwave-assisted synthesis methods. Structural analysis through X-ray diffraction (XRD) confirmed the perovskite phase of ZnSnO<sub>3</sub>. Field Emission Scanning Electron Microscopy (FESEM) and Transmission Electron Microscopy (TEM) revealed distinct morphological variations, while Energy Dispersive Spectroscopy (EDS) mapping validated the stoichiometric composition. X-ray Photoelectron Spectroscopy (XPS) further confirmed the oxidation states of Zn<sup>2+</sup>, Sn<sup>4+</sup>, and O<sup>2−</sup>. Optical studies from Ultraviolet–visible spectroscopy (UV–Vis) revealed bandgap values of 3.64 eV and 3.66 eV for ZnSnO<sub>3</sub> synthesized via hydrothermal and microwave methods, respectively. To evaluate their performance in optoelectronic applications, ZnSnO<sub>3</sub>-based electron transport layers (ETLs) were incorporated into an FTO/ZnSnO<sub>3</sub>/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/Spiro-MeOTAD/Au perovskite solar cell architecture. Notably, hydrothermally synthesized ZnSnO<sub>3</sub> nanopentagon ETLs achieved a power conversion efficiency (PCE) of 17.73 %, outperforming the 14.28 % PCE obtained with microwave-synthesized spherical nanoparticles. This study underscores the potential of ZnSnO<sub>3</sub>-based ETLs for highly efficient perovskite solar cells (PSCs), emphasizing the impact of synthesis methods on device performance. By demonstrating the viability of ZnSnO<sub>3</sub> nanomaterials in advanced optoelectronic applications, this work lays the groundwork for further optimization and development of high-performance devices leveraging ternary metal oxides.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125322"},"PeriodicalIF":3.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis, crystal structure, luminescent and magnetic properties of bimetallic complex and hydrogen-bonded ionic framework of 1,2,4,5-benzenetetracarboxylate
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-13 DOI: 10.1016/j.jssc.2025.125321
Peng Luo, Jie Zeng, Feng-Yang Lu, Guo-Qing Zhong
A new bimetallic complex and a new hydrogen-bonded ionic framework (HIF) containing 1,2,4,5-benzenetetracarboxylate of the formulae [Co(C10H2O8)(H2O)4][Ni(H2O)6] (1) and [C10H4O8]2[Ni(H2O)6][Zn(H2O)6] (2) were synthesized. The compounds were characterized by elemental analysis, atomic absorption spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy and thermal analysis. The crystal structure shows that 1 belongs to the triclinic system, P1 space group, in which Co2+ is coordinated with O atom of carboxylate on 1,2,4,5-benzenetetracarboxylate, while Ni2+ is coordinated with six water molecules. The water molecules on [Ni(H2O)6]2+ are connected with 1,2,4,5-benzenetetracarboxylate through hydrogen bonds. 2 belongs to monoclinic system, C2/c space group, in which Ni2+ and Zn2+ are respectively coordinated with six water molecules, forming a slightly twisted octahedral structure, and are connected with each other by hydrogen bonds. Fluorescence experiments show that 1 and 2 have fluorescence properties. Variable-temperature magnetic susceptibility study (2–300 K) indicates the existence of antiferromagnetic interactions in 1 and 2.
{"title":"Synthesis, crystal structure, luminescent and magnetic properties of bimetallic complex and hydrogen-bonded ionic framework of 1,2,4,5-benzenetetracarboxylate","authors":"Peng Luo,&nbsp;Jie Zeng,&nbsp;Feng-Yang Lu,&nbsp;Guo-Qing Zhong","doi":"10.1016/j.jssc.2025.125321","DOIUrl":"10.1016/j.jssc.2025.125321","url":null,"abstract":"<div><div>A new bimetallic complex and a new hydrogen-bonded ionic framework (HIF) containing 1,2,4,5-benzenetetracarboxylate of the formulae [Co(C<sub>10</sub>H<sub>2</sub>O<sub>8</sub>)(H<sub>2</sub>O)<sub>4</sub>][Ni(H<sub>2</sub>O)<sub>6</sub>] (<strong>1</strong>) and [C<sub>10</sub>H<sub>4</sub>O<sub>8</sub>]<sub>2</sub>[Ni(H<sub>2</sub>O)<sub>6</sub>][Zn(H<sub>2</sub>O)<sub>6</sub>] (<strong>2</strong>) were synthesized. The compounds were characterized by elemental analysis, atomic absorption spectroscopy, single-crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy and thermal analysis. The crystal structure shows that <strong>1</strong> belongs to the triclinic system, <span><math><mrow><mi>P</mi><mover><mn>1</mn><mo>‾</mo></mover></mrow></math></span> space group, in which Co<sup>2+</sup> is coordinated with O atom of carboxylate on 1,2,4,5-benzenetetracarboxylate, while Ni<sup>2+</sup> is coordinated with six water molecules. The water molecules on [Ni(H<sub>2</sub>O)<sub>6</sub>]<sup>2+</sup> are connected with 1,2,4,5-benzenetetracarboxylate through hydrogen bonds. <strong>2</strong> belongs to monoclinic system, <em>C</em>2/<em>c</em> space group, in which Ni<sup>2+</sup> and Zn<sup>2+</sup> are respectively coordinated with six water molecules, forming a slightly twisted octahedral structure, and are connected with each other by hydrogen bonds. Fluorescence experiments show that <strong>1</strong> and <strong>2</strong> have fluorescence properties. Variable-temperature magnetic susceptibility study (2–300 K) indicates the existence of antiferromagnetic interactions in <strong>1</strong> and <strong>2</strong>.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125321"},"PeriodicalIF":3.2,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced methanol-to-olefin catalysis with hierarchical ZSM-5@SAPO-34 composite derived from magadiite 利用岩浆石衍生的分层 ZSM-5@SAPO-34 复合材料增强甲醇制烯烃催化性能
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-12 DOI: 10.1016/j.jssc.2025.125320
Bo Liu , Chenxi Hou , Yu Gao , Jiamin Chen , Qiong Zhang , Qi Zhou , Hanlu Xu , Zihan Zhou , Yuan Gao , Rongli Jiang
We synthesized hierarchical ZSM-5@SAPO-34 (Z@S) composites using magadiite as a silicon precursor to enhance methanol-to-olefins catalysis. The process involves incorporating ZSM-5, with its nanosheet-aggregated spherical structure, into a SAPO-34 precursor gel. By adjusting crystallization times and seed loading, an optimized composite structure was achieved. Powder X-ray diffraction (PXRD) confirms the presence of highly crystalline SAPO-34 and ZSM-5 phases in the Z@S composite. SEM images shows that the composite is not merely a mechanical mixture but involves secondary crystallization of SAPO-34 on ZSM-5 surfaces, with ZSM-5 acting as both the seed and silica source. N2 adsorption-desorption tests demonstrates that the Z@S composite has a larger specific surface area and micropore volume compared to SAPO-34, ZSM-5, or physical mixed Z@S-PM. Temperature-programmed desorption of ammonia (NH3-TPD) analysis indicates superior acid strength and a higher density of acid sites in the Z@S composites, contributing to their enhanced catalytic efficacy. We then compared the catalytic performance of SAPO-34, ZSM-5, Z@S-PM, and Z@S. The Z@S composite, featuring hierarchical structure of interconnected mesopores and micropores, promotes efficient diffusion and transport of reactants and products. This result in enhanced resistance to coking within 71 h and 60.0 % selectivity for ethylene and propylene.
{"title":"Enhanced methanol-to-olefin catalysis with hierarchical ZSM-5@SAPO-34 composite derived from magadiite","authors":"Bo Liu ,&nbsp;Chenxi Hou ,&nbsp;Yu Gao ,&nbsp;Jiamin Chen ,&nbsp;Qiong Zhang ,&nbsp;Qi Zhou ,&nbsp;Hanlu Xu ,&nbsp;Zihan Zhou ,&nbsp;Yuan Gao ,&nbsp;Rongli Jiang","doi":"10.1016/j.jssc.2025.125320","DOIUrl":"10.1016/j.jssc.2025.125320","url":null,"abstract":"<div><div>We synthesized hierarchical ZSM-5@SAPO-34 (Z@S) composites using magadiite as a silicon precursor to enhance methanol-to-olefins catalysis. The process involves incorporating ZSM-5, with its nanosheet-aggregated spherical structure, into a SAPO-34 precursor gel. By adjusting crystallization times and seed loading, an optimized composite structure was achieved. Powder X-ray diffraction (PXRD) confirms the presence of highly crystalline SAPO-34 and ZSM-5 phases in the Z@S composite. SEM images shows that the composite is not merely a mechanical mixture but involves secondary crystallization of SAPO-34 on ZSM-5 surfaces, with ZSM-5 acting as both the seed and silica source. N<sub>2</sub> adsorption-desorption tests demonstrates that the Z@S composite has a larger specific surface area and micropore volume compared to SAPO-34, ZSM-5, or physical mixed Z@S-PM. Temperature-programmed desorption of ammonia (NH<sub>3</sub>-TPD) analysis indicates superior acid strength and a higher density of acid sites in the Z@S composites, contributing to their enhanced catalytic efficacy. We then compared the catalytic performance of SAPO-34, ZSM-5, Z@S-PM, and Z@S. The Z@S composite, featuring hierarchical structure of interconnected mesopores and micropores, promotes efficient diffusion and transport of reactants and products. This result in enhanced resistance to coking within 71 h and 60.0 % selectivity for ethylene and propylene.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125320"},"PeriodicalIF":3.2,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tuning thermal expansion and phase transition temperature with Mg substitution in Zn2V2O7
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-10 DOI: 10.1016/j.jssc.2025.125296
Garrett Mahler , Charles Iyare Jr. , Carolina Avalos , Seongyoung Kong , Kirill Kovnir , Joya A. Cooley
The thermal expansion coefficient of a material exhibiting negative thermal expansion above 400 °C, Zn2V2O7, was tuned using Mg as a substituent on the Zn site. Samples x=0.0,0.1,0.2 and 0.3 were prepared using high-temperature ceramic methods. Changes to the structure and properties with Mg substitution were analyzed using Rietveld refinement of ambient and variable-temperature X-ray diffraction data (VTXRD) using synchrotron radiation. The parent structure Zn2V2O7 transitions from the α phase (C2/c) to the β phase (C2/m) near 650 °C, and Mg substitution lowers the temperature of this transition as corroborated by differential scanning calorimetry measurements. Mg substitution allows the volume thermal expansion coefficient to be tuned from –19.80 ppm K−1 in x=0.0 to –13.46 ppm K−1 in x=0.3.
{"title":"Tuning thermal expansion and phase transition temperature with Mg substitution in Zn2V2O7","authors":"Garrett Mahler ,&nbsp;Charles Iyare Jr. ,&nbsp;Carolina Avalos ,&nbsp;Seongyoung Kong ,&nbsp;Kirill Kovnir ,&nbsp;Joya A. Cooley","doi":"10.1016/j.jssc.2025.125296","DOIUrl":"10.1016/j.jssc.2025.125296","url":null,"abstract":"<div><div>The thermal expansion coefficient of a material exhibiting negative thermal expansion above 400 °C, Zn<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>V<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>7</mn></mrow></msub></math></span>, was tuned using Mg as a substituent on the Zn site. Samples <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>0</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>1</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>2</mn></mrow></math></span> and 0.3 were prepared using high-temperature ceramic methods. Changes to the structure and properties with Mg substitution were analyzed using Rietveld refinement of ambient and variable-temperature X-ray diffraction data (VTXRD) using synchrotron radiation. The parent structure Zn<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>V<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>O<span><math><msub><mrow></mrow><mrow><mn>7</mn></mrow></msub></math></span> transitions from the <span><math><mi>α</mi></math></span> phase (<span><math><mrow><mi>C</mi><mn>2</mn><mo>/</mo><mi>c</mi></mrow></math></span>) to the <span><math><mi>β</mi></math></span> phase (<span><math><mrow><mi>C</mi><mn>2</mn><mo>/</mo><mi>m</mi></mrow></math></span>) near 650 °C, and Mg substitution lowers the temperature of this transition as corroborated by differential scanning calorimetry measurements. Mg substitution allows the volume thermal expansion coefficient to be tuned from –19.80 ppm K<sup>−1</sup> in <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>0</mn></mrow></math></span> to –13.46 ppm K<sup>−1</sup> in <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn><mo>.</mo><mn>3</mn></mrow></math></span>.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125296"},"PeriodicalIF":3.2,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143627816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bisphosphonate-modified boat-shaped polyoxoniobates for efficient catalysis of knoevenagel condensation
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-07 DOI: 10.1016/j.jssc.2025.125304
Xue-Yu Zhang, Yan-Ru Li, Li-Hao Hong, Ping-Xin Wu, Yu-Chen Cong, Ying-Hao Mi, Yan-Qiong Sun, Shou-Tian Zheng, Xin-Xiong Li
Three novel inorganic-organic hybrid polyoxoniobates (PONbs), H27K2Na6(H2O)17[K(H2O)(Nb6O19)2(Nb6O20)(RA)2]·13H2O (1, H5RA = C7H11NO7P2, risedronic acid), H21(CN3H6)12[K3(H2O)(Nb6O19)2(Nb6O20)(ZA)2]·5H2O (2, H5ZA = C5H10N2O7P2, zoledronic acid, CN3H6 = guanidine) and H24(CN3H6)7K2(H2O)4[K3(H2O)2(Nb6O19)2(Nb6O20)(EA)2]·8H2O (3, H5EA = C2H8O7P2, etidronic acid, CN3H6 = guanidine) were successfully synthesized. The polyoxoanion clusters are in a small boat shape and consist of {(Nb6O19)2(Nb6O20)} unit and two deprotonated RA5−, ZA5−, and EA5− ligands, respectively. Furthermore, PONb 1 can be used as an effective heterogeneous catalyst for the Knoevenagel condensation reaction with high yields and good substrate compatibility under optimal conditions. In addition, PONb 1 also has good catalytic activity in gram-scale reactions.
{"title":"Bisphosphonate-modified boat-shaped polyoxoniobates for efficient catalysis of knoevenagel condensation","authors":"Xue-Yu Zhang,&nbsp;Yan-Ru Li,&nbsp;Li-Hao Hong,&nbsp;Ping-Xin Wu,&nbsp;Yu-Chen Cong,&nbsp;Ying-Hao Mi,&nbsp;Yan-Qiong Sun,&nbsp;Shou-Tian Zheng,&nbsp;Xin-Xiong Li","doi":"10.1016/j.jssc.2025.125304","DOIUrl":"10.1016/j.jssc.2025.125304","url":null,"abstract":"<div><div>Three novel inorganic-organic hybrid polyoxoniobates (PONbs), H<sub>27</sub>K<sub>2</sub>Na<sub>6</sub>(H<sub>2</sub>O)<sub>17</sub>[K(H<sub>2</sub>O)(Nb<sub>6</sub>O<sub>19</sub>)<sub>2</sub>(Nb<sub>6</sub>O<sub>20</sub>)(RA)<sub>2</sub>]·13H<sub>2</sub>O (<strong>1</strong>, H<sub>5</sub>RA = C<sub>7</sub>H<sub>11</sub>NO<sub>7</sub>P<sub>2</sub>, risedronic acid<strong>)</strong>, H<sub>21</sub>(CN<sub>3</sub>H<sub>6</sub>)<sub>12</sub>[K<sub>3</sub>(H<sub>2</sub>O)(Nb<sub>6</sub>O<sub>19</sub>)<sub>2</sub>(Nb<sub>6</sub>O<sub>20</sub>)(ZA)<sub>2</sub>]·5H<sub>2</sub>O (<strong>2</strong>, H<sub>5</sub>ZA = C<sub>5</sub>H<sub>10</sub>N<sub>2</sub>O<sub>7</sub>P<sub>2</sub>, zoledronic acid, CN<sub>3</sub>H<sub>6</sub> = guanidine<strong>)</strong> and H<sub>24</sub>(CN<sub>3</sub>H<sub>6</sub>)<sub>7</sub>K<sub>2</sub>(H<sub>2</sub>O)<sub>4</sub>[K<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>(Nb<sub>6</sub>O<sub>19</sub>)<sub>2</sub>(Nb<sub>6</sub>O<sub>20</sub>)(EA)<sub>2</sub>]·8H<sub>2</sub>O (<strong>3</strong>, H<sub>5</sub>EA = C<sub>2</sub>H<sub>8</sub>O<sub>7</sub>P<sub>2</sub>, etidronic acid, CN<sub>3</sub>H<sub>6</sub> = guanidine<strong>)</strong> were successfully synthesized. The polyoxoanion clusters are in a small boat shape and consist of {(Nb<sub>6</sub>O<sub>19</sub>)<sub>2</sub>(Nb<sub>6</sub>O<sub>20</sub>)} unit and two deprotonated RA<sup>5−</sup>, ZA<sup>5−</sup>, and EA<sup>5−</sup> ligands, respectively. Furthermore, PONb <strong>1</strong> can be used as an effective heterogeneous catalyst for the Knoevenagel condensation reaction with high yields and good substrate compatibility under optimal conditions. In addition, PONb <strong>1</strong> also has good catalytic activity in gram-scale reactions.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125304"},"PeriodicalIF":3.2,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Luminescence enhancement and color regulation of Sr2LiAlO4-1.5xNx: Eu2+ phosphor for high color rendering index white LED applications
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-05 DOI: 10.1016/j.jssc.2025.125303
Wei Zhu , Jialing Zhou , Feifei Huang , Renguang Ye , Youjie Hua , Shiqing Xu
The color rendering index (CRI) of white light-emitting diodes (LEDs) is very important for lighting quality. Currently, high-CRI white LEDs are typically fabricated by combining multiple-color phosphors. Therefore, the realization of multipeak-emission phosphors in a single phosphor is valuable. The Sr2LiAlO4: Eu2+ phosphor exhibits an obvious double-peak emission in the yellow-green spectral range and has excellent luminescence properties, suggesting its potential application in white LEDs. In this study, a series of Sr2LiAlO4-1.5xNx: Eu2+ (x = 0–0.7) phosphors were successfully synthesized by introducing N3− ions to replace O2− ions. The luminescence intensity was significantly enhanced by increasing the N3− concentration. Upon reaching a concentration of 0.7, the intensity of the yellow emission exceeded that of the green emission, indicating a shift in emission color from green to yellow. The emission peak of the Sr2LiAlO2.95N0.7: Eu2+ phosphor is at 568 nm, which exhibited broader yellow light emission. Finally, Sr2LiAlO2.95N0.7: Eu2+ was fabricated with a CaAlSiN3: Eu2+ red phosphor on 450 nm blue LED chips. The fabricated white LEDs was observed to be white light with a high CRI of 92.1 and an adjustable color temperature (4938-6665k), showing its potential application in white LEDs.
{"title":"Luminescence enhancement and color regulation of Sr2LiAlO4-1.5xNx: Eu2+ phosphor for high color rendering index white LED applications","authors":"Wei Zhu ,&nbsp;Jialing Zhou ,&nbsp;Feifei Huang ,&nbsp;Renguang Ye ,&nbsp;Youjie Hua ,&nbsp;Shiqing Xu","doi":"10.1016/j.jssc.2025.125303","DOIUrl":"10.1016/j.jssc.2025.125303","url":null,"abstract":"<div><div>The color rendering index (CRI) of white light-emitting diodes (LEDs) is very important for lighting quality. Currently, high-CRI white LEDs are typically fabricated by combining multiple-color phosphors. Therefore, the realization of multipeak-emission phosphors in a single phosphor is valuable. The Sr<sub>2</sub>LiAlO<sub>4</sub>: Eu<sup>2+</sup> phosphor exhibits an obvious double-peak emission in the yellow-green spectral range and has excellent luminescence properties, suggesting its potential application in white LEDs. In this study, a series of Sr<sub>2</sub>LiAlO<sub>4-1.5<em>x</em></sub>N<sub><em>x</em></sub>: Eu<sup>2+</sup> (<em>x</em> = 0–0.7) phosphors were successfully synthesized by introducing N<sup>3−</sup> ions to replace O<sup>2−</sup> ions. The luminescence intensity was significantly enhanced by increasing the N<sup>3−</sup> concentration. Upon reaching a concentration of 0.7, the intensity of the yellow emission exceeded that of the green emission, indicating a shift in emission color from green to yellow. The emission peak of the Sr<sub>2</sub>LiAlO<sub>2.95</sub>N<sub>0.7</sub>: Eu<sup>2+</sup> phosphor is at 568 nm, which exhibited broader yellow light emission. Finally, Sr<sub>2</sub>LiAlO<sub>2.95</sub>N<sub>0.7</sub>: Eu<sup>2+</sup> was fabricated with a CaAlSiN<sub>3</sub>: Eu<sup>2+</sup> red phosphor on 450 nm blue LED chips. The fabricated white LEDs was observed to be white light with a high CRI of 92.1 and an adjustable color temperature (4938-6665k), showing its potential application in white LEDs.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125303"},"PeriodicalIF":3.2,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143576875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The structural, spectroscopic and electrical behavior of rare earth doped neodymium chromites
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-04 DOI: 10.1016/j.jssc.2025.125280
Shibani Lakshman, Soumya G. Nair
Perovskite lanthanum-substituted neodymium chromites (Nd1xLaxCrO3, x=0,0.04,0.08) synthesized using the solid-state route technique are described in this study in terms of their structural, optical, and electrical properties. The Rietveld refinement of X-ray diffraction (XRD) data validated the samples’ phase purity and crystal structure. To examine the diffuse reflectance spectra and elucidate the effect of lanthanum doping on their band gaps, the Tauc plot of the Kubelka–Munk function was employed. The notable optical behavior, such as indirect to direct band gap transition and band gap modification through doping, renders these materials essential for a wide range of optoelectronic applications. Neodymium chromite, pure and doped, exhibited temperature- and frequency-dependent dielectric properties in their broad dielectric spectroscopy, making them suitable for various electrochemical and electrical applications. A significant dielectric constant value, observed at room temperature, suggests the material is a ferroelectric relaxor. This study investigates the AC conductivity behavior of pure and doped materials as potential candidates for advanced electrochemical applications. Our results indicate that the temperature- and frequency-dependent conductivity significantly changes after doping, suggesting that certain applications require tailored conductivity characteristics. To optimize the performance of neodymium chromites, it is crucial to understand the activation energy, which is examined using the Arrhenius plot. The impact of dopants on the conductivity, grain–grain boundary effects, and the relaxation processes in NdCrO3 was also elucidated by analyzing the impedance spectra. Our studies on the pure and doped forms provide a comprehensive understanding of the electrical behavior of NdCrO3, which is essential for enhancing its performance in electronic and electrochemical applications.
{"title":"The structural, spectroscopic and electrical behavior of rare earth doped neodymium chromites","authors":"Shibani Lakshman,&nbsp;Soumya G. Nair","doi":"10.1016/j.jssc.2025.125280","DOIUrl":"10.1016/j.jssc.2025.125280","url":null,"abstract":"<div><div>Perovskite lanthanum-substituted neodymium chromites (Nd<span><math><msub><mrow></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub></math></span>La<span><math><msub><mrow></mrow><mrow><mi>x</mi></mrow></msub></math></span>CrO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, <span><math><mrow><mi>x</mi><mo>=</mo><mn>0</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>04</mn><mo>,</mo><mn>0</mn><mo>.</mo><mn>08</mn></mrow></math></span>) synthesized using the solid-state route technique are described in this study in terms of their structural, optical, and electrical properties. The Rietveld refinement of X-ray diffraction (XRD) data validated the samples’ phase purity and crystal structure. To examine the diffuse reflectance spectra and elucidate the effect of lanthanum doping on their band gaps, the Tauc plot of the Kubelka–Munk function was employed. The notable optical behavior, such as indirect to direct band gap transition and band gap modification through doping, renders these materials essential for a wide range of optoelectronic applications. Neodymium chromite, pure and doped, exhibited temperature- and frequency-dependent dielectric properties in their broad dielectric spectroscopy, making them suitable for various electrochemical and electrical applications. A significant dielectric constant value, observed at room temperature, suggests the material is a ferroelectric relaxor. This study investigates the AC conductivity behavior of pure and doped materials as potential candidates for advanced electrochemical applications. Our results indicate that the temperature- and frequency-dependent conductivity significantly changes after doping, suggesting that certain applications require tailored conductivity characteristics. To optimize the performance of neodymium chromites, it is crucial to understand the activation energy, which is examined using the Arrhenius plot. The impact of dopants on the conductivity, grain–grain boundary effects, and the relaxation processes in NdCrO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> was also elucidated by analyzing the impedance spectra. Our studies on the pure and doped forms provide a comprehensive understanding of the electrical behavior of NdCrO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span>, which is essential for enhancing its performance in electronic and electrochemical applications.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125280"},"PeriodicalIF":3.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Low-temperature preparation of high electrical conductivity amorphous compact Zn-doped TiO2 thin films via vacuum ultraviolet for high efficient solar cells
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-04 DOI: 10.1016/j.jssc.2025.125302
Jiao Men, Zhuo Dong, Yushan Li, Xiaoying Xie, Chenxi Zhang, Yanhong Qiao, Jingbo Zhang
Vacuum ultraviolet (VUV) with a wavelength of 172 nm was employed to prepare amorphous Zn-doped TiO2 (ZTO) thin films using titanium tetraisopropoxide as a precursor to form TiO2 and zinc(II) dibutyldithiocarbamate as a Zn doping source. During the VUV irradiation on the precursor films, the incorporation of zinc and the departure of nitrogen and sulfur enhance the conductivity and electron mobility of the thin films. The prepared ZTO thin films were used as the electron transport layer to fabricate mesoporous perovskite solar cells (PSCs). The optimal doping molar ratio of zinc was determined to be 2 % according to the photoelectric performance of PSCs based on the ZTO thin films. The improved interfacial contact between the ZTO electron transport layer and the electrode substrate reduces the interfacial charge transfer resistance. The synergistic effect of ZTO electron transport layer enhances the power conversion efficiency (PCE) of PSCs from 18.28 % to 21.21 %. In addition, the ZTO thin film was used as the compact layer in quantum dot-sensitized solar cells, significantly improving their performance. Therefore, the VUV irradiation technique is a general method to prepare the doping metal oxide thin films for fabricating high efficiency solar cells with the compact thin film structure.
{"title":"Low-temperature preparation of high electrical conductivity amorphous compact Zn-doped TiO2 thin films via vacuum ultraviolet for high efficient solar cells","authors":"Jiao Men,&nbsp;Zhuo Dong,&nbsp;Yushan Li,&nbsp;Xiaoying Xie,&nbsp;Chenxi Zhang,&nbsp;Yanhong Qiao,&nbsp;Jingbo Zhang","doi":"10.1016/j.jssc.2025.125302","DOIUrl":"10.1016/j.jssc.2025.125302","url":null,"abstract":"<div><div>Vacuum ultraviolet (VUV) with a wavelength of 172 nm was employed to prepare amorphous Zn-doped TiO<sub>2</sub> (ZTO) thin films using titanium tetraisopropoxide as a precursor to form TiO<sub>2</sub> and zinc(II) dibutyldithiocarbamate as a Zn doping source. During the VUV irradiation on the precursor films, the incorporation of zinc and the departure of nitrogen and sulfur enhance the conductivity and electron mobility of the thin films. The prepared ZTO thin films were used as the electron transport layer to fabricate mesoporous perovskite solar cells (PSCs). The optimal doping molar ratio of zinc was determined to be 2 % according to the photoelectric performance of PSCs based on the ZTO thin films. The improved interfacial contact between the ZTO electron transport layer and the electrode substrate reduces the interfacial charge transfer resistance. The synergistic effect of ZTO electron transport layer enhances the power conversion efficiency (PCE) of PSCs from 18.28 % to 21.21 %. In addition, the ZTO thin film was used as the compact layer in quantum dot-sensitized solar cells, significantly improving their performance. Therefore, the VUV irradiation technique is a general method to prepare the doping metal oxide thin films for fabricating high efficiency solar cells with the compact thin film structure.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125302"},"PeriodicalIF":3.2,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143548983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amorphous/Crystalline NiFeS@Ni0.85Se supported on nickel foam as bifunctional electrocatalysts for efficient water splitting
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-03-03 DOI: 10.1016/j.jssc.2025.125301
Hongzhi Wang, Xiangcheng Shen, Weiguo Zhang, Suwei Yao
The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni0.85Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni0.85Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm−2 for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm−2 for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm−2 at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm−2 and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.
{"title":"Amorphous/Crystalline NiFeS@Ni0.85Se supported on nickel foam as bifunctional electrocatalysts for efficient water splitting","authors":"Hongzhi Wang,&nbsp;Xiangcheng Shen,&nbsp;Weiguo Zhang,&nbsp;Suwei Yao","doi":"10.1016/j.jssc.2025.125301","DOIUrl":"10.1016/j.jssc.2025.125301","url":null,"abstract":"<div><div>The synthesis of low-cost transition metal bifunctional electrocatalysts that can replace noble metals is crucial for realizing high efficiency hydrogen production from industrial water splitting. Herein, a novel binder-free amorphous/crystalline NiFeS@Ni<sub>0.85</sub>Se bifunctional electrocatalyst material has been fabricated on nickel foam (NF) via a straightforward two-step electrodeposition method. The electrode features a unique structure in which NiFeS nanosheets of uniform size grow on Ni<sub>0.85</sub>Se microspheres, thus providing more active sites. It exhibits a minimal overpotential of 63 mV at 10 mA cm<sup>−2</sup> for hydrogen evolution reaction (HER) and 311 mV at 100 mA cm<sup>−2</sup> for oxygen evolution reaction (OER). Impressively, when assembled into an electrolytic cell, the electrocatalyst can reach 10 mA cm<sup>−2</sup> at just 1.51 V and remains stable for 220 h. Additionally, at 1.68 V, the catalyst reaches 50 mA cm<sup>−2</sup> and maintains stable operation for 140 h, demonstrating outstanding water splitting potential. This paper presents a composite material that combines the crystalline and amorphous states, allowing them to complement each other and jointly promote catalytic performance.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125301"},"PeriodicalIF":3.2,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase evolution and lattice dynamics in Ag2WO4 from 15 K to 530 K: Insights from powder X-ray diffraction and Raman spectroscopy
IF 3.2 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Pub Date : 2025-02-28 DOI: 10.1016/j.jssc.2025.125298
D.A.B. Barbosa , A.S. de Menezes , C. Luz-Lima , T.M.B.F. Oliveira , C.C. Santos , J.V.B. Moura
Silver tungstate (Ag2WO4) is a multifunctional and polymorphic material, recognized for its metastable phases and a wide range of applications due to its highly desirable properties. The synthesis of its phases, along with the resulting structure and morphology, is highly sensitive to the synthesis method, processing conditions, and the presence of surfactants, allowing the surface properties to be optimized. Ag2WO4 polymorphism involves three distinct crystalline phases: alpha (orthorhombic), beta (hexagonal), and gamma (cubic), each exhibiting different micrometric-scale morphologies. Additionally, the beta and gamma phases are metastable and transform into the alpha phase with increasing temperature. In this investigation, we synthesized γ-Ag2WO4 crystals using a precipitation method at low temperatures. The resulting precipitate was washed with acetone and dried at 50 °C. We characterized the physical properties using Powder X-Ray Diffraction and Raman Spectroscopy across varying temperature ranges. The synthesized samples exhibited a dominant cubic phase with a minor beta phase (∼5 %) at room temperature. Powder X-Ray Diffraction and Raman Spectroscopy revealed three Ag2WO4 phases (alpha, beta, gamma) between 15 K and 530 K, with phase transitions occurring at 360 K, 420 K, and 480 K. The gamma phase predominated up to 340 K, while the alpha phase became dominant above 400 K, as the beta and gamma phases gradually disappeared, especially above 470 K. The γ→α phase transition can be classified as reconstructive.
{"title":"Phase evolution and lattice dynamics in Ag2WO4 from 15 K to 530 K: Insights from powder X-ray diffraction and Raman spectroscopy","authors":"D.A.B. Barbosa ,&nbsp;A.S. de Menezes ,&nbsp;C. Luz-Lima ,&nbsp;T.M.B.F. Oliveira ,&nbsp;C.C. Santos ,&nbsp;J.V.B. Moura","doi":"10.1016/j.jssc.2025.125298","DOIUrl":"10.1016/j.jssc.2025.125298","url":null,"abstract":"<div><div>Silver tungstate (Ag<sub>2</sub>WO<sub>4</sub>) is a multifunctional and polymorphic material, recognized for its metastable phases and a wide range of applications due to its highly desirable properties. The synthesis of its phases, along with the resulting structure and morphology, is highly sensitive to the synthesis method, processing conditions, and the presence of surfactants, allowing the surface properties to be optimized. Ag<sub>2</sub>WO<sub>4</sub> polymorphism involves three distinct crystalline phases: alpha (orthorhombic), beta (hexagonal), and gamma (cubic), each exhibiting different micrometric-scale morphologies. Additionally, the beta and gamma phases are metastable and transform into the alpha phase with increasing temperature. In this investigation, we synthesized γ-Ag<sub>2</sub>WO<sub>4</sub> crystals using a precipitation method at low temperatures. The resulting precipitate was washed with acetone and dried at 50 °C. We characterized the physical properties using Powder X-Ray Diffraction and Raman Spectroscopy across varying temperature ranges. The synthesized samples exhibited a dominant cubic phase with a minor beta phase (∼5 %) at room temperature. Powder X-Ray Diffraction and Raman Spectroscopy revealed three Ag<sub>2</sub>WO<sub>4</sub> phases (alpha, beta, gamma) between 15 K and 530 K, with phase transitions occurring at 360 K, 420 K, and 480 K. The gamma phase predominated up to 340 K, while the alpha phase became dominant above 400 K, as the beta and gamma phases gradually disappeared, especially above 470 K. The γ→α phase transition can be classified as reconstructive.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"347 ","pages":"Article 125298"},"PeriodicalIF":3.2,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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Journal of Solid State Chemistry
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