Pub Date : 2024-10-11DOI: 10.1016/j.optmat.2024.116252
S.N. Nazrin , Azuraida Amat , Shams A.M. Issa , Hesham M.H. Zakaly , Saraswathy Shamini Gunasekaran , Halimah Badioze Zaman , M.H.M. Zaid , M.H.M. Tahir , Ibrahim A. Shaaban , Ishu Sharma
Using the formula [(TeO2)70(B2O3)30], this study examines the impact of Gd2O3 on the elasticity and radiation shielding characteristics of zinc borotellurite glass. Glass samples containing 1–5% mol% Gd2O3 were created by employing the melt quench technique. XRD verified that they are amorphous in nature, and the existence of TeO3, TeO4, BO3, and BO4 vibrational groups was revealed by infrared spectra. The structural alterations were shown by the range of longitudinal and shear ultrasonic velocities, which were 3908–4076 m/s and 2222–2277 m/s, respectively. The glass's rigidity was improved by the large rise in elastic moduli, such as bulk (45 GPa), longitudinal (80 GPa), shear (25 GPa), and Young's moduli (60 GPa), with a higher Gd2O3 content. Higher concentrations of Gd2O3 resulted in a rise in the mass attenuation coefficient (μρ), as measured by WinXcom, which enhanced gamma-ray shielding. The half-value layer (HVL) and mean free path (MFP) at 0.662 MeV decreased with increasing Gd2O3 in a consistent manner. The maximum density and optimum gamma-ray shielding performance were found in the glass containing 5 mol% Gd2O3. These results show Gd2O3 for applications needing greater rigidity and better radiation protection by demonstrating how it affects the elastic and radiation-shielding efficiency of the glass network.
{"title":"Elastic and radiation shielding properties of zinc borotellurite glass systems: The impact of gadolinium oxide","authors":"S.N. Nazrin , Azuraida Amat , Shams A.M. Issa , Hesham M.H. Zakaly , Saraswathy Shamini Gunasekaran , Halimah Badioze Zaman , M.H.M. Zaid , M.H.M. Tahir , Ibrahim A. Shaaban , Ishu Sharma","doi":"10.1016/j.optmat.2024.116252","DOIUrl":"10.1016/j.optmat.2024.116252","url":null,"abstract":"<div><div>Using the formula [(TeO<sub>2</sub>)<sub>70</sub>(B<sub>2</sub>O<sub>3</sub>)<sub>30</sub>], this study examines the impact of Gd<sub>2</sub>O<sub>3</sub> on the elasticity and radiation shielding characteristics of zinc borotellurite glass. Glass samples containing 1–5% mol% Gd<sub>2</sub>O<sub>3</sub> were created by employing the melt quench technique. XRD verified that they are amorphous in nature, and the existence of TeO<sub>3</sub>, TeO<sub>4</sub>, BO<sub>3</sub>, and BO<sub>4</sub> vibrational groups was revealed by infrared spectra. The structural alterations were shown by the range of longitudinal and shear ultrasonic velocities, which were 3908–4076 m/s and 2222–2277 m/s, respectively. The glass's rigidity was improved by the large rise in elastic moduli, such as bulk (45 GPa), longitudinal (80 GPa), shear (25 GPa), and Young's moduli (60 GPa), with a higher Gd<sub>2</sub>O<sub>3</sub> content. Higher concentrations of Gd<sub>2</sub>O<sub>3</sub> resulted in a rise in the mass attenuation coefficient (μ<sub>ρ</sub>), as measured by WinXcom, which enhanced gamma-ray shielding. The half-value layer (HVL) and mean free path (MFP) at 0.662 MeV decreased with increasing Gd<sub>2</sub>O<sub>3</sub> in a consistent manner. The maximum density and optimum gamma-ray shielding performance were found in the glass containing 5 mol% Gd<sub>2</sub>O<sub>3</sub>. These results show Gd<sub>2</sub>O<sub>3</sub> for applications needing greater rigidity and better radiation protection by demonstrating how it affects the elastic and radiation-shielding efficiency of the glass network.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116252"},"PeriodicalIF":3.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-11DOI: 10.1016/j.optmat.2024.116257
Juxia Tong, Zhiwei Luo, Xinzhu Liu, Haozhang Liang, Anxian Lu
Tm3+ single-doped and Tm3+-Tb3+ co-doped SiO2–B2O3–Na2O–ZnO–MoO3-Gd2O3 glasses were successfully prepared by the melt-quenching process. X-ray diffraction and transmittance measurements were used to determine that the optimal heat treatment regime consisted of crystallization at 620 °C for 5 h and transparent glass-ceramics containing the NaGd(MoO4)2 single phase were obtained. The characterization results by SEM confirmed that the size of the crystals precipitated in the glass matrix was on the nanometer level. The effects of different contents of Tm2O3 on the luminescent properties of glass-ceramics in this system were explored. The results showed that the emission peak at 453 nm (1D2→3F4) had the highest intensity when Tm2O3 was doped with 0.5 mol% under the wavelength at 359 nm excitation. In addition, with the gradual increase of Tb2O3 contents, the luminescence colour of the Tm2O3–Tb2O3 co-doped glass-ceramics gradually shifted from blue to green. This indicates its potential application in blue-green light display technologies and various other areas. The experimental results of the water resistance stability of the samples show that the co-doped glass-ceramic still has good luminescence stability after being immersed in water, which provides further favourable support for its application.
{"title":"Optical properties and energy transfer of Tm3+ single-doped and Tm3+-Tb3+ co-doped transparent glass-ceramics containing NaGd(MoO4)2 single phase","authors":"Juxia Tong, Zhiwei Luo, Xinzhu Liu, Haozhang Liang, Anxian Lu","doi":"10.1016/j.optmat.2024.116257","DOIUrl":"10.1016/j.optmat.2024.116257","url":null,"abstract":"<div><div>Tm<sup>3+</sup> single-doped and Tm<sup>3+</sup>-Tb<sup>3+</sup> co-doped SiO<sub>2</sub>–B<sub>2</sub>O<sub>3</sub>–Na<sub>2</sub>O–ZnO–MoO<sub>3</sub>-Gd<sub>2</sub>O<sub>3</sub> glasses were successfully prepared by the melt-quenching process. X-ray diffraction and transmittance measurements were used to determine that the optimal heat treatment regime consisted of crystallization at 620 °C for 5 h and transparent glass-ceramics containing the NaGd(MoO<sub>4</sub>)<sub>2</sub> single phase were obtained. The characterization results by SEM confirmed that the size of the crystals precipitated in the glass matrix was on the nanometer level. The effects of different contents of Tm2O3 on the luminescent properties of glass-ceramics in this system were explored. The results showed that the emission peak at 453 nm (<sup>1</sup>D<sub>2</sub>→<sup>3</sup>F<sub>4</sub>) had the highest intensity when Tm<sub>2</sub>O<sub>3</sub> was doped with 0.5 mol% under the wavelength at 359 nm excitation. In addition, with the gradual increase of Tb<sub>2</sub>O<sub>3</sub> contents, the luminescence colour of the Tm<sub>2</sub>O<sub>3</sub>–Tb<sub>2</sub>O<sub>3</sub> co-doped glass-ceramics gradually shifted from blue to green. This indicates its potential application in blue-green light display technologies and various other areas. The experimental results of the water resistance stability of the samples show that the co-doped glass-ceramic still has good luminescence stability after being immersed in water, which provides further favourable support for its application.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116257"},"PeriodicalIF":3.8,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116237
Davide Baiocco , Ignacio Lopez-Quintas , Javier R. Vázquez de Aldana , Mauro Tonelli , Alessandro Tredicucci
In this Letter we report the near infrared operation of a femtosecond-laser-written diode-pumped Pr:LiLuF4 waveguide laser. By employing a circular depressed-cladding waveguide with propagation losses as low as 0.19 dB/cm, we demonstrated lasing at 914 nm, with a maximum output power of 140 mW and a slope efficiency of 24%. Moreover, we demonstrated the possibility of lasing in a waveguide device at 894 nm, 922 nm and 933 nm. To the authors knowledge, this is the first demonstration of a Pr-based waveguide laser operating in this spectral region.
{"title":"Near infrared diode-pumped lasing of femtosecond-laser-written Pr:LiLuF4 waveguide","authors":"Davide Baiocco , Ignacio Lopez-Quintas , Javier R. Vázquez de Aldana , Mauro Tonelli , Alessandro Tredicucci","doi":"10.1016/j.optmat.2024.116237","DOIUrl":"10.1016/j.optmat.2024.116237","url":null,"abstract":"<div><div>In this Letter we report the near infrared operation of a femtosecond-laser-written diode-pumped Pr:LiLuF<sub>4</sub> waveguide laser. By employing a circular depressed-cladding waveguide with propagation losses as low as 0.19<!--> <!-->dB/cm, we demonstrated lasing at 914 nm, with a maximum output power of 140<!--> <!-->mW and a slope efficiency of 24%. Moreover, we demonstrated the possibility of lasing in a waveguide device at 894 nm, 922 nm and 933 nm. To the authors knowledge, this is the first demonstration of a Pr-based waveguide laser operating in this spectral region.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116237"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116253
Kaushal Sarswat , Shiv Kumar Pal , Z.Y. Khattari , A. Dahshan , Neeraj Mehta
The current study examines the impact of metal additives on the shielding characteristics of Se76Te20Sn2M2 (where M = Ge, In, Sb, and Pb). These glasses are useful as shielding materials against high-energy radiation, such as X-rays and ϒ-rays, because these glasses have better values of shielding parameters compared to other potential candidates in the race for nuclear safety applications. To this end, we have calculated various radiation-related protection parameters using an online application called Phy-X/PSD. Using this program, we have estimated a complete list of radiation shielding parameters. The impact of the fourth element M (M = Ge, In, Sb, and Pb) on these parameters is also discussed.
The maximum mass attenuation coefficient (MAC) was recorded at a photon energy of 15 keV for the incorporation of lead. Half-value layer (HVL) values peaked at 6 MeV and it attained its maximum value for germanium. The highest and lowest values of the linear attenuation coefficients (LAC) were obtained for Se76Te20Sn2Pb2 and Se76Te20Sn2Ge2 alloys respectively. Notably, the Se76Te20Sn2Pb2 alloy exhibited the highest values of effective atomic number (Zeff), electron density (Neff), atomic cross-section (ACS), and electronic cross-section (ECS), indicating superior shielding performance. Conversely, energy absorption buildup factors (EABF) and exposure buildup factors (EBF) were highest for Se76Te20Sn2Ge2 alloy. Neutron attenuation was most effective in the Se76Te20Sn2In2 and Se76Te20Sn2Pb2 compositions. Overall, the incorporation of lead in the parent glass demonstrated superior shielding capability compared to the other compositions studied.
{"title":"A comprehensive study of radiation shielding parameters of chalcogens-rich quaternary alloys for nuclear waste management","authors":"Kaushal Sarswat , Shiv Kumar Pal , Z.Y. Khattari , A. Dahshan , Neeraj Mehta","doi":"10.1016/j.optmat.2024.116253","DOIUrl":"10.1016/j.optmat.2024.116253","url":null,"abstract":"<div><div>The current study examines the impact of metal additives on the shielding characteristics of Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>M<sub>2</sub> (where M = Ge, In, Sb, and Pb). These glasses are useful as shielding materials against high-energy radiation, such as X-rays and ϒ-rays, because these glasses have better values of shielding parameters compared to other potential candidates in the race for nuclear safety applications. To this end, we have calculated various radiation-related protection parameters using an online application called Phy-X/PSD. Using this program, we have estimated a complete list of radiation shielding parameters. The impact of the fourth element M (M = Ge, In, Sb, and Pb) on these parameters is also discussed.</div><div>The maximum mass attenuation coefficient (MAC) was recorded at a photon energy of 15 keV for the incorporation of lead. Half-value layer (HVL) values peaked at 6 MeV and it attained its maximum value for germanium. The highest and lowest values of the linear attenuation coefficients (LAC) were obtained for Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>Pb<sub>2</sub> and Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>Ge<sub>2</sub> alloys respectively. Notably, the Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>Pb<sub>2</sub> alloy exhibited the highest values of effective atomic number (<em>Z</em><sub><em>eff</em></sub>), electron density (<em>N</em><sub><em>eff</em></sub>), atomic cross-section (ACS), and electronic cross-section (ECS), indicating superior shielding performance. Conversely, energy absorption buildup factors (EABF) and exposure buildup factors (EBF) were highest for Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>Ge<sub>2</sub> alloy. Neutron attenuation was most effective in the Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>In<sub>2</sub> and Se<sub>76</sub>Te<sub>20</sub>Sn<sub>2</sub>Pb<sub>2</sub> compositions. Overall, the incorporation of lead in the parent glass demonstrated superior shielding capability compared to the other compositions studied.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116253"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142437915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116255
Naimat Ullah , Ahmed Shuja , Syed Mujtaba Shah , Rotaba Ansir , Khalid A. Alrashidi , Saikh Mohammad , Mohd Zahid Ansari , Imran Murtaza
The pursuit of sustainable energy solutions has spurred innovation in photovoltaic technology, with dye-sensitized solar cells (DSSCs) emerging as promising contenders. This study presents a novel approach leveraging holmium-doped TiO2/SnO2 nanocomposites sensitized with organic dyes, Arsenazo-III, carminic acid, and dithizone, blended with poly (3-hexylthiophene) (P3HT). Through meticulous characterization and analysis, key parameters including short-circuit current density (Jsc), open-circuit voltage (Voc), fill factor (FF), and overall percent efficiency (%) were scrutinized to evaluate photovoltaic performance comprehensively. Absorption spectra analysis facilitated the calculation of band gaps, revealing a significant reduction from 3.10 eV in pure Titania (TiO2) nanoparticles to 2.72 eV upon doping with Holmium and coupling with SnO2. Notably, Arsenazo-III dye-sensitized holmium-doped TiO2/SnO2 nanocomposites exhibited highest power conversion efficiency, achieving a promising efficiency of 2.10 %, which marked a significant improvement over the reference device (0.82 %). This improvement is attributed to the synergistic effects of holmium dopant incorporation and SnO2 interaction, enhancing light responsiveness. The findings not only validate the efficacy of nanohybrid assemblies but also contribute valuable insights to solar cell technology advancement.
{"title":"Enhancing dye-sensitized solar cells efficiency through organic dyes-sensitized holmium-doped TiO2/SnO2 nanocomposites blended with P3HT","authors":"Naimat Ullah , Ahmed Shuja , Syed Mujtaba Shah , Rotaba Ansir , Khalid A. Alrashidi , Saikh Mohammad , Mohd Zahid Ansari , Imran Murtaza","doi":"10.1016/j.optmat.2024.116255","DOIUrl":"10.1016/j.optmat.2024.116255","url":null,"abstract":"<div><div>The pursuit of sustainable energy solutions has spurred innovation in photovoltaic technology, with dye-sensitized solar cells (DSSCs) emerging as promising contenders. This study presents a novel approach leveraging holmium-doped TiO<sub>2</sub>/SnO<sub>2</sub> nanocomposites sensitized with organic dyes, Arsenazo-III, carminic acid, and dithizone, blended with poly (3-hexylthiophene) (P3HT). Through meticulous characterization and analysis, key parameters including short-circuit current density (Jsc), open-circuit voltage (Voc), fill factor (FF), and overall percent efficiency (%) were scrutinized to evaluate photovoltaic performance comprehensively. Absorption spectra analysis facilitated the calculation of band gaps, revealing a significant reduction from 3.10 eV in pure Titania (TiO<sub>2</sub>) nanoparticles to 2.72 eV upon doping with Holmium and coupling with SnO<sub>2</sub>. Notably, Arsenazo-III dye-sensitized holmium-doped TiO<sub>2</sub>/SnO<sub>2</sub> nanocomposites exhibited highest power conversion efficiency, achieving a promising efficiency of 2.10 %, which marked a significant improvement over the reference device (0.82 %). This improvement is attributed to the synergistic effects of holmium dopant incorporation and SnO<sub>2</sub> interaction, enhancing light responsiveness. The findings not only validate the efficacy of nanohybrid assemblies but also contribute valuable insights to solar cell technology advancement.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116255"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116251
Li Zhang , Junyu Li , Zeren He, Huanyang Chen, Yousheng Zou
Since polarized light can carry additional information to enhance target and environment identification, detection of polarized light has been widely used in complex environments and conditions. Generally, anisotropic arrayed gratings or structures are required to capture polarized signals, and these additional structures inevitably increase the size of the device and limit its application. Given this, using spontaneously grown anisotropic structures to enhance polarization identification has become an important direction to achieve miniaturized polarization detection. Organic-inorganic halide perovskites have been widely used in optoelectronic devices due to their excellent extinction coefficient and photogenerated carrier transport properties. Meanwhile, due to its simple solution preparation process, micro-region morphology modulation of perovskites can be realized using template-confined growth. In this work, ordered surface channels are constructed on MAPbBr3 single-crystal thins film by template-confined growth. PDMS templates are utilized to transfer the CD- and DVD-ROM grating pattern and act as the templates to confine the single-crystal growth. By optimizing the imprinting parameters, channel arrays with spacing of 1450 nm and 760 nm are constructed on the surface of single crystals. Further, polarized photodetectors based on MAPbBr3 single-crystal thin films are constructed with a high on/off ratio of 450 and a specific detectivity of 5 × 109 Jones. The patterned detectors with intervals of 1450 nm and 760 nm exhibit enhanced polarization sensitivities of 1.72 and 1.83, respectively.
{"title":"Oriented surface arrays on perovskite single-crystal thin films for enhanced polarization sensing","authors":"Li Zhang , Junyu Li , Zeren He, Huanyang Chen, Yousheng Zou","doi":"10.1016/j.optmat.2024.116251","DOIUrl":"10.1016/j.optmat.2024.116251","url":null,"abstract":"<div><div>Since polarized light can carry additional information to enhance target and environment identification, detection of polarized light has been widely used in complex environments and conditions. Generally, anisotropic arrayed gratings or structures are required to capture polarized signals, and these additional structures inevitably increase the size of the device and limit its application. Given this, using spontaneously grown anisotropic structures to enhance polarization identification has become an important direction to achieve miniaturized polarization detection. Organic-inorganic halide perovskites have been widely used in optoelectronic devices due to their excellent extinction coefficient and photogenerated carrier transport properties. Meanwhile, due to its simple solution preparation process, micro-region morphology modulation of perovskites can be realized using template-confined growth. In this work, ordered surface channels are constructed on MAPbBr<sub>3</sub> single-crystal thins film by template-confined growth. PDMS templates are utilized to transfer the CD- and DVD-ROM grating pattern and act as the templates to confine the single-crystal growth. By optimizing the imprinting parameters, channel arrays with spacing of 1450 nm and 760 nm are constructed on the surface of single crystals. Further, polarized photodetectors based on MAPbBr<sub>3</sub> single-crystal thin films are constructed with a high on/off ratio of 450 and a specific detectivity of 5 × 10<sup>9</sup> Jones. The patterned detectors with intervals of 1450 nm and 760 nm exhibit enhanced polarization sensitivities of 1.72 and 1.83, respectively.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116251"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116250
Deenbandhu Sharma, S.K. Sharma
All-inorganic halide perovskites CsPbX3 (X = Cl, Br, I) have shown encouraging potential for optoelectronic devices. In this work, the synthesis of CsPbCl3 perovskites is reported by a simple approach using three different solvents namely dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and a mixture of dimethyl sulfoxide and dimethylformamide. The structural, optical and electrical properties of CsPbCl3 perovskites are compared to identify the optimal solvent for the synthesis process. The DMSO-based CsPbCl3 perovskite exhibits an optical bandgap value of 2.96 eV along with high photoluminescence intensity, high charge carrier mobility (29.8 cm2/V-s), and low resistivity (8.06 x 107 Ω-cm) compared to the other two CsPbCl3 perovskites. These results indicate that DMSO solvent plays an important role in achieving desired optical and electrical properties of CsPbCl3 perovskites suitable for optoelectronic devices.
{"title":"Optimizing the properties of CsPbCl3 perovskites using a solvent-based synthesis approach","authors":"Deenbandhu Sharma, S.K. Sharma","doi":"10.1016/j.optmat.2024.116250","DOIUrl":"10.1016/j.optmat.2024.116250","url":null,"abstract":"<div><div>All-inorganic halide perovskites CsPbX<sub>3</sub> (X = Cl, Br, I) have shown encouraging potential for optoelectronic devices. In this work, the synthesis of CsPbCl<sub>3</sub> perovskites is reported by a simple approach using three different solvents namely dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and a mixture of dimethyl sulfoxide and dimethylformamide. The structural, optical and electrical properties of CsPbCl<sub>3</sub> perovskites are compared to identify the optimal solvent for the synthesis process. The DMSO-based CsPbCl<sub>3</sub> perovskite exhibits an optical bandgap value of 2.96 eV along with high photoluminescence intensity, high charge carrier mobility (29.8 cm<sup>2</sup>/V-s), and low resistivity (8.06 x 10<sup>7</sup> Ω-cm) compared to the other two CsPbCl<sub>3</sub> perovskites. These results indicate that DMSO solvent plays an important role in achieving desired optical and electrical properties of CsPbCl<sub>3</sub> perovskites suitable for optoelectronic devices.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116250"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116254
A. El Hassani , A. Alsaad , L. Amiri , Y. El Hassouani , S. Dlimi , A. Narjis , L. Limouny
Cadmium sulphide thin films were successfully synthesized by the flash evaporation method under vacuum, then annealed at various temperatures. X-Ray Diffraction patterns showed the formation of the hexagonal wurtzite phase. Structural properties of this most stable phase remain approximately the same at all investigated temperatures. Scanning Electronic Microscopy showed the formation of granular films. The Energy Dispersive X-ray spectra revealed the possible formation of stoichiometric compounds. The obtained UV–Vis spectra revealed that the prepared films exhibit a moderate direct band gap with high transmittance in the visible range. Detailed interpretation of the structural, optical, and optoelectronic findings revealed that annealed CdS thin films hold promising potential for the fabrication of the next generation of the modern optoelectronic devices. Cadmium sulphide thin films were successfully synthesized by the flash evaporation method under vacuum, then annealed at various temperatures. X-Ray Diffraction patterns showed the formation of the hexagonal wurtzite phase for all temperatures with almost the same structural properties. UV–vis spectra revealed that the prepared films exhibit a moderate direct band gap with high transmittance in the visible range, which reinforces the usefulness of these films for photovoltaic and photocatalytique applications. Scanning Electronic Microscopy shows the formation of granular films, while the Energy Dispersive X-ray spectra revealed the possible formation of stoichiometric compounds.
在真空条件下采用闪蒸法成功合成了硫化镉薄膜，然后在不同温度下进行了退火处理。X 射线衍射图样显示形成了六方沃特兹相。这种最稳定相的结构特性在所有研究温度下都大致相同。扫描电子显微镜显示形成了颗粒状薄膜。能量色散 X 射线光谱显示可能形成了共价化合物。获得的紫外可见光谱显示，制备的薄膜具有适度的直接带隙，在可见光范围内具有较高的透射率。对结构、光学和光电研究结果的详细解读表明，退火的 CdS 薄膜具有制造下一代现代光电设备的巨大潜力。研究人员在真空条件下采用闪蒸法成功合成了硫化镉薄膜，并在不同温度下进行了退火处理。X 射线衍射图样显示，在所有温度下都形成了结构特性几乎相同的六方闪锌矿相。紫外-可见光谱显示，所制备的薄膜具有适度的直接带隙，在可见光范围内具有较高的透射率，这增强了这些薄膜在光伏和光触媒应用方面的实用性。扫描电子显微镜显示形成了颗粒状薄膜，而能量色散 X 射线光谱显示可能形成了共价化合物。
{"title":"Study of structural, morphological and optical properties of flash evaporated cadmium sulphide thin films","authors":"A. El Hassani , A. Alsaad , L. Amiri , Y. El Hassouani , S. Dlimi , A. Narjis , L. Limouny","doi":"10.1016/j.optmat.2024.116254","DOIUrl":"10.1016/j.optmat.2024.116254","url":null,"abstract":"<div><div>Cadmium sulphide thin films were successfully synthesized by the flash evaporation method under vacuum, then annealed at various temperatures. X-Ray Diffraction patterns showed the formation of the hexagonal wurtzite phase. Structural properties of this most stable phase remain approximately the same at all investigated temperatures. Scanning Electronic Microscopy showed the formation of granular films. The Energy Dispersive X-ray spectra revealed the possible formation of stoichiometric compounds. The obtained UV–Vis spectra revealed that the prepared films exhibit a moderate direct band gap with high transmittance in the visible range. Detailed interpretation of the structural, optical, and optoelectronic findings revealed that annealed CdS thin films hold promising potential for the fabrication of the next generation of the modern optoelectronic devices. Cadmium sulphide thin films were successfully synthesized by the flash evaporation method under vacuum, then annealed at various temperatures. X-Ray Diffraction patterns showed the formation of the hexagonal wurtzite phase for all temperatures with almost the same structural properties. UV–vis spectra revealed that the prepared films exhibit a moderate direct band gap with high transmittance in the visible range, which reinforces the usefulness of these films for photovoltaic and photocatalytique applications. Scanning Electronic Microscopy shows the formation of granular films, while the Energy Dispersive X-ray spectra revealed the possible formation of stoichiometric compounds.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116254"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study focuses on laser-induced oxidation of TC4 alloy surfaces and achieves precise color control on TC4 surfaces at room temperature using laser post-processing. The current research lacks an in-depth understanding of the mechanism responsible for color changes due to the number of processing cycles. This study aims to improve the quality of coloration through secondary processing and establish a color control mechanism based on accumulated energy density. Statistical analyses revealed notable reductions in ΔE, ΔC∗, and Δh∗, indicating enhanced color uniformity. Surface morphology and reflectance data further confirmed these findings, demonstrating the effectiveness of secondary processing in achieving consistent and uniform coloration.
{"title":"Investigations on color quality improvement through laser-induced surface oxidation for coloration","authors":"Yuhang An , Yaoyao Qi , ZhanDa Zhu , Chang Chang , Lei Xiong , Xiao Chen , Guling Zhang , Wenyan Gao","doi":"10.1016/j.optmat.2024.116249","DOIUrl":"10.1016/j.optmat.2024.116249","url":null,"abstract":"<div><div>This study focuses on laser-induced oxidation of TC4 alloy surfaces and achieves precise color control on TC4 surfaces at room temperature using laser post-processing. The current research lacks an in-depth understanding of the mechanism responsible for color changes due to the number of processing cycles. This study aims to improve the quality of coloration through secondary processing and establish a color control mechanism based on accumulated energy density. Statistical analyses revealed notable reductions in ΔE, ΔC∗, and Δh∗, indicating enhanced color uniformity. Surface morphology and reflectance data further confirmed these findings, demonstrating the effectiveness of secondary processing in achieving consistent and uniform coloration.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116249"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-10DOI: 10.1016/j.optmat.2024.116243
M.S. Nithyapriya , Muthu Mariappan Sivalingam , M. Navaneethan , J. Archana
The work function (WF) of the counter electrode (CE) predominantly determines the device performance of dye sensitized solar cells (DSSCs) as it controls the electron transfer rate for dye regeneration. Hence in this work, tin disulphide/reduced graphene oxide (SnS2/rGO) composites were synthesized with different wt.% of rGO (3, 5, 7, 10 %) and investigated their performance in DSSCs applications. At the outset, the formation of pristine SnS2 and SnS2/rGO composites were confirmed through X-ray diffraction and Raman spectral analysis. The morphological imaging revealed the micro flower-like structure of SnS2 with cross-sectional width of 5 0.2 μm, and petal thickness ranges from 30.7 nm to 46.4 nm. The binding energy spectra confirms the 4+ oxidation state of Sn in both SnS2 and 7 wt% SnS2/rGO, suggesting that the rGO does not alter the chemical states of SnS2. Further, the peak-to-peak separation values obtained from Cylic-Voltammetry analysis were found to be 0.37 and 0.57 V for S7 and Pt CE respectively, indicating the rapid electrolyte reduction of 7 wt% SnS2/rGO. Finally, a photo conversion efficiency (PCE) of 7.3 % has been achieved with 7 wt% SnS2/rGO CE which is greater than that of the PCE with Pt CE (6.5 %) and also higher than that of pristine SnS2 with 4.7 %. The improved PCE is attributed to the reduced WF of the 7 wt% SnS2/rGO composite as measured from the Kelvin probe force microscopy analysis, enabling the rapid redox reaction towards triiodide reduction.
{"title":"Flower-like SnS2/rGO composites with efficient iodide-triiodide redox performance for counter electrodes in Pt-free dye-sensitized solar cells","authors":"M.S. Nithyapriya , Muthu Mariappan Sivalingam , M. Navaneethan , J. Archana","doi":"10.1016/j.optmat.2024.116243","DOIUrl":"10.1016/j.optmat.2024.116243","url":null,"abstract":"<div><div>The work function (WF) of the counter electrode (CE) predominantly determines the device performance of dye sensitized solar cells (DSSCs) as it controls the electron transfer rate for dye regeneration. Hence in this work, tin disulphide/reduced graphene oxide (SnS<sub>2</sub>/rGO) composites were synthesized with different wt.% of rGO (3, 5, 7, 10 %) and investigated their performance in DSSCs applications. At the outset, the formation of pristine SnS<sub>2</sub> and SnS<sub>2</sub>/rGO composites were confirmed through X-ray diffraction and Raman spectral analysis. The morphological imaging revealed the micro flower-like structure of SnS<sub>2</sub> with cross-sectional width of 5 <span><math><mrow><mo>±</mo></mrow></math></span> 0.2 μm, and petal thickness ranges from 30.7 nm to 46.4 nm. The binding energy spectra confirms the 4+ oxidation state of Sn in both SnS<sub>2</sub> and 7 wt% SnS<sub>2</sub>/rGO, suggesting that the rGO does not alter the chemical states of SnS<sub>2</sub>. Further, the peak-to-peak separation values obtained from Cylic-Voltammetry analysis were found to be 0.37 and 0.57 V for S7 and Pt CE respectively, indicating the rapid electrolyte reduction of 7 wt% SnS<sub>2</sub>/rGO. Finally, a photo conversion efficiency (PCE) of 7.3 % has been achieved with 7 wt% SnS<sub>2</sub>/rGO CE which is greater than that of the PCE with Pt CE (6.5 %) and also higher than that of pristine SnS<sub>2</sub> with 4.7 %. The improved PCE is attributed to the reduced WF of the 7 wt% SnS<sub>2</sub>/rGO composite as measured from the Kelvin probe force microscopy analysis, enabling the rapid redox reaction towards triiodide reduction.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116243"},"PeriodicalIF":3.8,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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