Pub Date : 2024-10-22DOI: 10.1016/j.solidstatesciences.2024.107728
Nagendra Singh Chauhan , Qiang Zhang
Entropy engineering is a promising strategy for high-performance thermoelectrics, as it enhances material stability, reduces thermal conductivity, and optimizes electronic transport by manipulating configurational entropy. This perspective highlights the design principles and recent advancements in the development of entropy-stabilized Heusler alloys (ESHAs) for thermoelectric applications. The extensive compositional space available in ESHAs provides exciting opportunities to explore entropy stabilized multicomponent alloying, potentially leading to the discovery of new compositions with enhanced thermoelectric properties. However, challenges persist in optimizing these compositions, understanding the composition – structure – properties relationships, and scaling up production. Addressing these challenges remains critical for advancing the practical application of ESHAs in thermoelectrics.
{"title":"Entropy stabilized Heusler alloys for thermoelectric applications","authors":"Nagendra Singh Chauhan , Qiang Zhang","doi":"10.1016/j.solidstatesciences.2024.107728","DOIUrl":"10.1016/j.solidstatesciences.2024.107728","url":null,"abstract":"<div><div>Entropy engineering is a promising strategy for high-performance thermoelectrics, as it enhances material stability, reduces thermal conductivity, and optimizes electronic transport by manipulating configurational entropy. This perspective highlights the design principles and recent advancements in the development of entropy-stabilized Heusler alloys (ESHAs) for thermoelectric applications. The extensive compositional space available in ESHAs provides exciting opportunities to explore entropy stabilized multicomponent alloying, potentially leading to the discovery of new compositions with enhanced thermoelectric properties. However, challenges persist in optimizing these compositions, understanding the composition – structure – properties relationships, and scaling up production. Addressing these challenges remains critical for advancing the practical application of ESHAs in thermoelectrics.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"158 ","pages":"Article 107728"},"PeriodicalIF":3.4,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560546","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}
Pub Date : 2024-10-18DOI: 10.1016/j.solidstatesciences.2024.107724
Tejas , A. Princy , S Masilla Moses Kennedy , M.I. Sayyed , Taha A. Hanafy , Sudha D. Kamath
We synthesized Sm³⁺-doped SrB₂O₄ phosphors through a solid-state reaction method, varying the Sm³⁺ doping concentrations. Structural and morphological characteristics of material were investigated using Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD) and scanning electron microscopy (SEM). Optical transitions were analyzed by recording the diffuse reflectance spectroscopy, while photoluminescent (PL) spectra were used to evaluate luminescence properties. The PL spectra revealed a strong orange emission at 598 nm under 402 nm excitation. The optimal Sm³⁺ doping concentration was determined to be 0.02 mol, beyond which concentration quenching occurred. This quenching is attributed to exchange-type interactions, which facilitate non-radiative energy relaxation. The CIE color chromaticity coordinates of all the synthesized phosphors fell within the orange region of the chromaticity diagram. Temperature dependent photoluminescence revealed lower activation energy and phonon energy. Thermal quenching temperature was calculated which is inline with commercially available LEDs. All of these results indicate the candidature of SrB2O4 phosphor doped with Sm3+ ions for solid state lighting and optical thermal sensing applications.
{"title":"Structural, optical, and thermal traits of Sm³⁺-doped SrB₂O₄ phosphors for solid-state lighting applications","authors":"Tejas , A. Princy , S Masilla Moses Kennedy , M.I. Sayyed , Taha A. Hanafy , Sudha D. Kamath","doi":"10.1016/j.solidstatesciences.2024.107724","DOIUrl":"10.1016/j.solidstatesciences.2024.107724","url":null,"abstract":"<div><div>We synthesized Sm³⁺-doped SrB₂O₄ phosphors through a solid-state reaction method, varying the Sm³⁺ doping concentrations. Structural and morphological characteristics of material were investigated using Fourier-transform infrared spectroscopy (FTIR), X-Ray Diffraction (XRD) and scanning electron microscopy (SEM). Optical transitions were analyzed by recording the diffuse reflectance spectroscopy, while photoluminescent (PL) spectra were used to evaluate luminescence properties. The PL spectra revealed a strong orange emission at 598 nm under 402 nm excitation. The optimal Sm³⁺ doping concentration was determined to be 0.02 mol, beyond which concentration quenching occurred. This quenching is attributed to exchange-type interactions, which facilitate non-radiative energy relaxation. The CIE color chromaticity coordinates of all the synthesized phosphors fell within the orange region of the chromaticity diagram. Temperature dependent photoluminescence revealed lower activation energy and phonon energy. Thermal quenching temperature was calculated which is inline with commercially available LEDs. All of these results indicate the candidature of SrB<sub>2</sub>O<sub>4</sub> phosphor doped with Sm<sup>3+</sup> ions for solid state lighting and optical thermal sensing applications.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107724"},"PeriodicalIF":3.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527508","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}
Pub Date : 2024-10-18DOI: 10.1016/j.solidstatesciences.2024.107726
Jiufu Chen , Binghao Wang , Jianzhang Li, Junbo Zhong
Surface treatment can effectively modulate the surface properties of a photocatalyst to hasten the separation and transfer of photoinduced charges, ultimately achieving high photocatalytic performance. Herein, surface treatment of anatase-phase TiO2 prepared by a hydrothermal method was performed under H2/N2 mixed atmosphere. The experimental results demonstrate that roasting TiO2 in a H2/N2 atmosphere can effectively reduce partial Ti4+ to Ti3+, thereby facilitating the production of tunable oxygen vacancies (OVs) by disrupting Ti-O-Ti bonds. OVs can construct defective energy levels to bring about a decrease in the bandgap of TiO2 and an extension of light absorption range. Moreover, OVs remarkedly improve the separation of photoinduced charges of TiO2 and accelerate the photocatalytic reaction as active sites. The photocatalytic experimental results demonstrate that TiO2 exhibits the highest performance when roasting TiO2 in a H2/N2 atmosphere for 2 h, and the photocatalytic degradation rate constant of rhodamine B (RhB) and tetracycline (TC) on this sample under simulated solar light irradiation is 2.24 and 1.11 times higher than that on the reference TiO2, respectively. These findings provide valuable insights for designing highly efficient photocatalysts for effective water pollution treatment.
{"title":"Enhanced photocatalytic performance of TiO2 with tunable oxygen vacancies induced by H2/N2 mixture treatment","authors":"Jiufu Chen , Binghao Wang , Jianzhang Li, Junbo Zhong","doi":"10.1016/j.solidstatesciences.2024.107726","DOIUrl":"10.1016/j.solidstatesciences.2024.107726","url":null,"abstract":"<div><div>Surface treatment can effectively modulate the surface properties of a photocatalyst to hasten the separation and transfer of photoinduced charges, ultimately achieving high photocatalytic performance. Herein, surface treatment of anatase-phase TiO<sub>2</sub> prepared by a hydrothermal method was performed under H<sub>2</sub>/N<sub>2</sub> mixed atmosphere. The experimental results demonstrate that roasting TiO<sub>2</sub> in a H<sub>2</sub>/N<sub>2</sub> atmosphere can effectively reduce partial Ti<sup>4+</sup> to Ti<sup>3+</sup>, thereby facilitating the production of tunable oxygen vacancies (OVs) by disrupting Ti-O-Ti bonds. OVs can construct defective energy levels to bring about a decrease in the bandgap of TiO<sub>2</sub> and an extension of light absorption range. Moreover, OVs remarkedly improve the separation of photoinduced charges of TiO<sub>2</sub> and accelerate the photocatalytic reaction as active sites. The photocatalytic experimental results demonstrate that TiO<sub>2</sub> exhibits the highest performance when roasting TiO<sub>2</sub> in a H<sub>2</sub>/N<sub>2</sub> atmosphere for 2 h, and the photocatalytic degradation rate constant of rhodamine B (RhB) and tetracycline (TC) on this sample under simulated solar light irradiation is 2.24 and 1.11 times higher than that on the reference TiO<sub>2</sub>, respectively. These findings provide valuable insights for designing highly efficient photocatalysts for effective water pollution treatment.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107726"},"PeriodicalIF":3.4,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527507","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}
Pub Date : 2024-10-17DOI: 10.1016/j.solidstatesciences.2024.107722
Oksana Zaremba, Mariia-Suzanna Teplinska, Pavlo Demchenko, Vasyl Kordan, Roman Gladyshevskii
The phase diagram of the BaO(BaCO3)–Lu2O3–CuO system was built at 900 °C. It comprises of 8 single-phase, 15 two-phase, and 8 three-phase regions. The boundary oxide systems Lu2O3–CuO and BaO–CuO contain the phases Lu2Cu2O5 (structure type Ho2Cu2O5, Pearson symbol oP36, space group Pna21, a = 10.702(1), b = 3.412(1), c = 12.360(1) Å, RB = 0.076) and Ba44Cu45O90 (own structure type, cI400, Im-3m, a = 18.294(3) Å, RB = 0.114), whereas in the Lu2O3–BaO(BaCO3) system the oxide-carbonate Ba3Lu2[CO3]O5 (Ba3Yb2[CO3]O5, tP26, P4/mmm, a = 4.322(1), c = 11.862(2) Å, RB = 0.107) was identified under the conditions of the experiment. Two quaternary oxides were observed. The structure of BaLu2CuO5 was confirmed (BaY2CuO5, oP36, Pnma), whereas the structure of the phase with approximate composition Ba3LuCu2O6.5 still needs to be established. The electrochemical properties of BaLu2CuO5 as cathode material in Li-ion batteries were investigated. The existence of a (in part) substitutional solid solution BaLu2CuO5:Li was confirmed by the decrease of the unit-cell volume (−0.11 %). No traces of the formation of a phase with YBCO-type structure were detected at 900 °C.
{"title":"More about the BaO(BaCO3)–Lu2O3–CuO system","authors":"Oksana Zaremba, Mariia-Suzanna Teplinska, Pavlo Demchenko, Vasyl Kordan, Roman Gladyshevskii","doi":"10.1016/j.solidstatesciences.2024.107722","DOIUrl":"10.1016/j.solidstatesciences.2024.107722","url":null,"abstract":"<div><div>The phase diagram of the BaO(BaCO<sub>3</sub>)–Lu<sub>2</sub>O<sub>3</sub>–CuO system was built at 900 °C. It comprises of 8 single-phase, 15 two-phase, and 8 three-phase regions. The boundary oxide systems Lu<sub>2</sub>O<sub>3</sub>–CuO and BaO–CuO contain the phases Lu<sub>2</sub>Cu<sub>2</sub>O<sub>5</sub> (structure type Ho<sub>2</sub>Cu<sub>2</sub>O<sub>5</sub>, Pearson symbol <em>oP</em>36, space group <em>Pna</em>2<sub>1</sub>, <em>a</em> = 10.702(1), <em>b</em> = 3.412(1), <em>c</em> = 12.360(1) Å, <em>R</em><sub>B</sub> = 0.076) and Ba<sub>44</sub>Cu<sub>45</sub>O<sub>90</sub> (own structure type, <em>cI</em>400, <em>Im</em>-3<em>m</em>, <em>a</em> = 18.294(3) Å, <em>R</em><sub>B</sub> = 0.114), whereas in the Lu<sub>2</sub>O<sub>3</sub>–BaO(BaCO<sub>3</sub>) system the oxide-carbonate Ba<sub>3</sub>Lu<sub>2</sub>[CO<sub>3</sub>]O<sub>5</sub> (Ba<sub>3</sub>Yb<sub>2</sub>[CO<sub>3</sub>]O<sub>5</sub>, <em>tP</em>26, <em>P</em>4/<em>mmm</em>, <em>a</em> = 4.322(1), <em>c</em> = 11.862(2) Å, <em>R</em><sub>B</sub> = 0.107) was identified under the conditions of the experiment. Two quaternary oxides were observed. The structure of BaLu<sub>2</sub>CuO<sub>5</sub> was confirmed (BaY<sub>2</sub>CuO<sub>5</sub>, <em>oP</em>36, <em>Pnma</em>), whereas the structure of the phase with approximate composition Ba<sub>3</sub>LuCu<sub>2</sub>O<sub>6.5</sub> still needs to be established. The electrochemical properties of BaLu<sub>2</sub>CuO<sub>5</sub> as cathode material in Li-ion batteries were investigated. The existence of a (in part) substitutional solid solution BaLu<sub>2</sub>CuO<sub>5</sub>:Li was confirmed by the decrease of the unit-cell volume (−0.11 %). No traces of the formation of a phase with YBCO-type structure were detected at 900 °C.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107722"},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527772","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}
Pub Date : 2024-10-17DOI: 10.1016/j.solidstatesciences.2024.107725
Victoria G. Grossman , Maxim S. Molokeev , Bair G. Bazarov
The traditional solid-state synthesizing method was employed to prepare Tl5-xKxLuZr(MoO4)6 (x = 0; 0.1; 0.2; 1; 2) ceramics. Structural characterization was performed through the Rietveld method on the X-ray powder diffraction data. The unit cell parameters are defined for Tl5-xKxLuZr(MoO4)6 (x = 0; 0.1; 0.2; 1; 2). Impedance spectra were measured at temperatures ranging from 300 to 800 K, covering a frequency range of 1 Hz to 1 MHz. The results show that the electrical conductivity decreases with an incrementing in the x value in the range of x = 0.1–2.0. Tl4.9K0.1LuZr(MoO4)6 has the best ionic conductivity of this series of molybdates (1.31 × 10−3 S cm−1), and Tl5LuZr(MoO4)6 has the lowest conductivity (5.51 × 10−4 S cm−1). Activation energy was found out to decrease from 1.32 eV for Tl5LuZr(MoO4)6 to 0.92 eV for Tl4.9K0.1LuZr(MoO4)6.
采用传统固态合成法制备了 Tl5-xKxLuZr(MoO4)6 (x = 0; 0.1; 0.2; 1; 2) 陶瓷。通过对 X 射线粉末衍射数据的里特维尔德法进行了结构表征。确定了 Tl5-xKxLuZr(MoO4)6 (x = 0; 0.1; 0.2; 1; 2) 的单胞参数。在 300 至 800 K 的温度范围内测量了阻抗谱，频率范围为 1 Hz 至 1 MHz。结果表明，在 x = 0.1-2.0 的范围内，电导率随着 x 值的增加而降低。在这一系列钼酸盐中，Tl4.9K0.1LuZr(MoO4)6 的离子导电率最好（1.31 × 10-3 S cm-1），而 Tl5LuZr(MoO4)6 的导电率最低（5.51 × 10-4 S cm-1）。活化能从 Tl5LuZr(MoO4)6 的 1.32 eV 下降到 Tl4.9K0.1LuZr(MoO4)6 的 0.92 eV。
{"title":"Synthesis and investigation of the structure, thermal and electrical properties of new Tl5-xKxLuZr(MoO4)6 (x = 0; 0.1; 0.2; 1; 2) molybdates","authors":"Victoria G. Grossman , Maxim S. Molokeev , Bair G. Bazarov","doi":"10.1016/j.solidstatesciences.2024.107725","DOIUrl":"10.1016/j.solidstatesciences.2024.107725","url":null,"abstract":"<div><div>The traditional solid-state synthesizing method was employed to prepare Tl<sub>5-<em>x</em></sub>K<sub><em>x</em></sub>LuZr(MoO<sub>4</sub>)<sub>6</sub> (<em>x</em> = 0; 0.1; 0.2; 1; 2) ceramics. Structural characterization was performed through the Rietveld method on the X-ray powder diffraction data. The unit cell parameters are defined for Tl<sub>5-<em>x</em></sub>K<sub><em>x</em></sub>LuZr(MoO<sub>4</sub>)<sub>6</sub> (<em>x</em> = 0; 0.1; 0.2; 1; 2). Impedance spectra were measured at temperatures ranging from 300 to 800 K, covering a frequency range of 1 Hz to 1 MHz. The results show that the electrical conductivity decreases with an incrementing in the <em>x</em> value in the range of <em>x</em> = 0.1–2.0. Tl<sub>4.9</sub>K<sub>0.1</sub>LuZr(MoO<sub>4</sub>)<sub>6</sub> has the best ionic conductivity of this series of molybdates (1.31 × 10<sup>−3</sup> S cm<sup>−1</sup><sub>)</sub>, and Tl<sub>5</sub>LuZr(MoO<sub>4</sub>)<sub>6</sub> has the lowest conductivity (5.51 × 10<sup>−4</sup> S cm<sup>−1</sup><sub>)</sub>. Activation energy was found out to decrease from 1.32 eV for Tl<sub>5</sub>LuZr(MoO<sub>4</sub>)<sub>6</sub> to 0.92 eV for Tl<sub>4.9</sub>K<sub>0.1</sub>LuZr(MoO<sub>4</sub>)<sub>6.</sub></div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107725"},"PeriodicalIF":3.4,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527505","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}
Pub Date : 2024-10-16DOI: 10.1016/j.solidstatesciences.2024.107723
Burak Ay , Rina Takano , Takayuki Ishida
Four novel mononuclear lanthanide complexes, [Ln(TPymT)(NO3)3(H2O)2] (Ln: Eu3+ (1), Gd3+ (2), Tb3+ (3) and Dy3+ (4)), have been solvothermally synthesized using multidentate 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (TPymT). Compounds 1–3 have been characterized by means of elemental analysis, FT-IR, and single-crystal/powder X-ray diffraction analysis. Compound 4 was structurally characterized. The Ln3+ ion in 1–4 is ten-coordinated, where TPymT serves as an N3 donor in an isostructural series. The alternating-current magnetic studies showed frequency dependence below ca. 10 K for 3, as an indication of a single-ion magnet. The activation energy for the magnetization reorientation was estimated as Ueff/kB = 95(9) K after applying a dc bias field 2000 Oe for 3. The photoluminescent studies clarified that 1 and 3 behaved as red and green light emitters with quantum yields as high as 17 and 39 %, respectively. The TD-DFT calculation supports the energy level scheme of ground and excited states of TPymT together with the reference compound 4′-phenyl-2,2’:6′,2″-terpyridine. The present work suggests a broad chance and motivation to apply TPymT to the field of 4f coordination chemistry.
{"title":"First TPymT-Ln complexes (TPymT = 2,4,6-Tris(2-pyrimidyl)-1,3,5-triazine; Ln = Eu, Gd, Tb, Dy): Solvothermal synthesis, structure, magnetic and photoluminescent properties","authors":"Burak Ay , Rina Takano , Takayuki Ishida","doi":"10.1016/j.solidstatesciences.2024.107723","DOIUrl":"10.1016/j.solidstatesciences.2024.107723","url":null,"abstract":"<div><div>Four novel mononuclear lanthanide complexes, [Ln(<strong>TPymT</strong>)(NO<sub>3</sub>)<sub>3</sub>(H<sub>2</sub>O)<sub>2</sub>] (Ln: Eu<sup>3+</sup> (<strong>1</strong>), Gd<sup>3+</sup> (<strong>2</strong>), Tb<sup>3+</sup> (<strong>3</strong>) and Dy<sup>3+</sup> (<strong>4</strong>)), have been solvothermally synthesized using multidentate 2,4,6-tris(2-pyrimidyl)-1,3,5-triazine (<strong>TPymT</strong>). Compounds <strong>1</strong>–<strong>3</strong> have been characterized by means of elemental analysis, FT-IR, and single-crystal/powder X-ray diffraction analysis. Compound <strong>4</strong> was structurally characterized. The Ln<sup>3+</sup> ion in <strong>1</strong>–<strong>4</strong> is ten-coordinated, where <strong>TPymT</strong> serves as an N<sub>3</sub> donor in an isostructural series. The alternating-current magnetic studies showed frequency dependence below ca. 10 K for <strong>3</strong>, as an indication of a single-ion magnet. The activation energy for the magnetization reorientation was estimated as <em>U</em><sub>eff</sub>/<em>k</em><sub>B</sub> = 95(9) K after applying a dc bias field 2000 Oe for <strong>3</strong>. The photoluminescent studies clarified that <strong>1</strong> and <strong>3</strong> behaved as red and green light emitters with quantum yields as high as 17 and 39 %, respectively. The TD-DFT calculation supports the energy level scheme of ground and excited states of <strong>TPymT</strong> together with the reference compound 4′-phenyl-2,2’:6′,2″-terpyridine. The present work suggests a broad chance and motivation to apply <strong>TPymT</strong> to the field of 4f coordination chemistry.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107723"},"PeriodicalIF":3.4,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142527506","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}
Pub Date : 2024-10-10DOI: 10.1016/j.solidstatesciences.2024.107721
Klinton Brito K , Shobana Priyanka D , Srinivasan M , Sudharsan J B , Fujiwara K , Ramasamy P
In this article, we comprehensively reviewed the thermoelectric proper-ties of skutterudites-based materials. We discussed the various synthesis methods like non-chemical and chemical methods for the synthesis of the skutterudites materials for thermoelectric applications. In particular, this review articles also consolidates the information on how the filler plays a crucial role in improving the thermoelectric performance of the skutterudites materials. In addition, this review also concentrates on diverse fabrication methods employed in the production of skutterudites to optimize their thermoelectric performance. It also elucidates the efficiency of devices based on skutterudite materials and discusses the applications of thermoelectric devices.
{"title":"Skutterudites as sustainable thermoelectric material- A critical review","authors":"Klinton Brito K , Shobana Priyanka D , Srinivasan M , Sudharsan J B , Fujiwara K , Ramasamy P","doi":"10.1016/j.solidstatesciences.2024.107721","DOIUrl":"10.1016/j.solidstatesciences.2024.107721","url":null,"abstract":"<div><div>In this article, we comprehensively reviewed the thermoelectric proper-ties of skutterudites-based materials. We discussed the various synthesis methods like non-chemical and chemical methods for the synthesis of the skutterudites materials for thermoelectric applications. In particular, this review articles also consolidates the information on how the filler plays a crucial role in improving the thermoelectric performance of the skutterudites materials. In addition, this review also concentrates on diverse fabrication methods employed in the production of skutterudites to optimize their thermoelectric performance. It also elucidates the efficiency of devices based on skutterudite materials and discusses the applications of thermoelectric devices.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107721"},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432013","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}
Pub Date : 2024-10-10DOI: 10.1016/j.solidstatesciences.2024.107720
Jerzy Goraus , Wojciech Gumulak , Jacek Czerniewski , Marcin Fijałkowski , Jerzy Kubacki , Ondrej Zivotsky
Ti2MnAl was believed to be Spin Gapless Semiconducting (SGS) material, but this state can be achieved only in an inverted variant of Heusler structure. This specific structure is not realized under normal conditions, however, earlier reports suggest that substituting Al by In or Sn should make it possible. This was the motivation for studying the structural and physical properties of Ti2MnAl0.5In0.5 alloy in this paper. We also studied isoelectronic Ti2Fe0.5Cr0.5Al material, as it is well known that properties of Heusler compounds strongly depend on the valence electron count. We report a combined experimental and theoretical study, where we synthesized substituted variants and measured their diffraction patterns. Additionally we performed ab initio calculations using several methods to study the stability of the resulting compounds. We also examined the impact of disorder within Coherent Potential Approximation. Experimental XPS (X-ray Photoemission Spectroscopy) spectra, magnetic susceptibility and electrical resistivity are also discussed.
人们认为 Ti2MnAl 是无自旋间隙半导体（SGS）材料，但这种状态只有在 Heusler 结构的倒置变体中才能实现。这种特殊结构在正常条件下无法实现，然而，早先的报告表明，用 In 或 Sn 替代 Al 应该可以实现。这就是本文研究 Ti2MnAl0.5In0.5 合金的结构和物理性质的动机。我们还研究了等电子的 Ti2Fe0.5Cr0.5Al 材料，因为众所周知，Heusler 化合物的性质与价电子数密切相关。我们报告了一项实验和理论相结合的研究，我们合成了取代变体，并测量了它们的衍射图样。此外，我们还使用多种方法进行了 ab initio 计算，以研究由此产生的化合物的稳定性。我们还研究了相干势近似法中无序的影响。此外，我们还讨论了实验 XPS（X 射线光发射光谱）光谱、磁感应强度和电阻率。
{"title":"Structure and physical properties of modified Ti2MnAl compound – Ti2Fe0.5Cr0.5Al and Ti2MnAl0.5In0.5 case","authors":"Jerzy Goraus , Wojciech Gumulak , Jacek Czerniewski , Marcin Fijałkowski , Jerzy Kubacki , Ondrej Zivotsky","doi":"10.1016/j.solidstatesciences.2024.107720","DOIUrl":"10.1016/j.solidstatesciences.2024.107720","url":null,"abstract":"<div><div>Ti<sub>2</sub>MnAl was believed to be Spin Gapless Semiconducting (SGS) material, but this state can be achieved only in an inverted variant of Heusler structure. This specific structure is not realized under normal conditions, however, earlier reports suggest that substituting Al by In or Sn should make it possible. This was the motivation for studying the structural and physical properties of Ti<sub>2</sub>MnAl<sub>0.5</sub>In<sub>0.5</sub> alloy in this paper. We also studied isoelectronic Ti<sub>2</sub>Fe<sub>0.5</sub>Cr<sub>0.5</sub>Al material, as it is well known that properties of Heusler compounds strongly depend on the valence electron count. We report a combined experimental and theoretical study, where we synthesized substituted variants and measured their diffraction patterns. Additionally we performed ab initio calculations using several methods to study the stability of the resulting compounds. We also examined the impact of disorder within Coherent Potential Approximation. Experimental XPS (X-ray Photoemission Spectroscopy) spectra, magnetic susceptibility and electrical resistivity are also discussed.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107720"},"PeriodicalIF":3.4,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432012","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}
Solid-state ionic method has attracted more and more attention due to its simple operation and controllable preparation, but its growth mechanism is still uncertain. In this work, Ag nanowire (Ag NW) arrays prepared by solid-state ionics method at 5 μA impressed currents using fast ionic conductor RbAg4I5 films and different metal electrodes were reported. The conduction mode of Ag+ in RbAg4I5 films, the growth mechanism of Ag NW arrays prepared by solid-state ionics method and the effect of microscopic morphology on surface-enhance Raman scattering (SERS) performance were investigated. The results show that Ag nanoparticles (Ag NPs) with diameters from 40 nm to 70 nm were attached to the surface of Ag NW arrays with diameters of 80–150 nm prepared with different metal electrodes, which lead to Ag NW arrays have high surface roughness. The conduction velocity and stability of Ag+ in RbAg4I5 films are closely related to the morphology of Ag NW arrays. The irregular electrode interface and apical growth advantage resulted in the fractal dimension of Ag NW arrays prepared with Ag electrodes is 1.69 due to macroscopic dendritic structure. Ag NW arrays have excellent SERS performance due to the many Ag NPs attached to the surface of the closely aligned Ag NWs, the limit of detection (LOD) for Basic Fuchsin (BF) and Crystal Violet (CV) detected by Ag NW arrays SERS substrates prepared with Ag electrodes are as low as 10−11and 10−14mol/L, respectively. This paper provides a reference for the preparation method of metal nanostructures, Ag NW arrays have good potential for application in the field of trace analysis.
固态离子法因其操作简单、制备过程可控而受到越来越多的关注，但其生长机理仍不确定。本研究采用固态离子法，利用快速离子导体 RbAg4I5 薄膜和不同的金属电极，在 5 μA 冲击电流下制备了 Ag 纳米线（Ag NW）阵列。研究了 Ag+ 在 RbAg4I5 薄膜中的传导模式、固态离子法制备的 Ag NW 阵列的生长机制以及微观形貌对表面增强拉曼散射（SERS）性能的影响。结果表明，不同金属电极制备的直径为 80-150 nm 的 Ag NW 阵列表面附着有直径为 40 nm 至 70 nm 的 Ag NPs，导致 Ag NW 阵列具有较高的表面粗糙度。RbAg4I5 薄膜中 Ag+ 的传导速度和稳定性与 Ag NW 阵列的形态密切相关。由于不规则的电极界面和顶端生长优势，使用银电极制备的 Ag NW 阵列具有宏观树枝状结构，分形维数为 1.69。由于紧密排列的 Ag NW 表面附着了许多 Ag NPs，因此 Ag NW 阵列具有优异的 SERS 性能，用 Ag NW 阵列制备的 SERS 基底检测到的碱性品红（BF）和水晶紫（CV）的检测限（LOD）分别低至 10-11mol/L 和 10-14mol/L。本文为金属纳米结构的制备方法提供了参考，Ag NW 阵列在痕量分析领域具有良好的应用潜力。
{"title":"Growth mechanism and SERS effect of Ag nanowire arrays prepared by solid-state ionics method","authors":"Dapeng Xu, Yarui Liu, Song Zhang, Zixiong Wang, Wei Yang, Qiaoqin Guo, Jian Chen","doi":"10.1016/j.solidstatesciences.2024.107718","DOIUrl":"10.1016/j.solidstatesciences.2024.107718","url":null,"abstract":"<div><div>Solid-state ionic method has attracted more and more attention due to its simple operation and controllable preparation, but its growth mechanism is still uncertain. In this work, Ag nanowire (Ag NW) arrays prepared by solid-state ionics method at 5 μA impressed currents using fast ionic conductor RbAg<sub>4</sub>I<sub>5</sub> films and different metal electrodes were reported. The conduction mode of Ag<sup>+</sup> in RbAg<sub>4</sub>I<sub>5</sub> films, the growth mechanism of Ag NW arrays prepared by solid-state ionics method and the effect of microscopic morphology on surface-enhance Raman scattering (SERS) performance were investigated. The results show that Ag nanoparticles (Ag NPs) with diameters from 40 nm to 70 nm were attached to the surface of Ag NW arrays with diameters of 80–150 nm prepared with different metal electrodes, which lead to Ag NW arrays have high surface roughness. The conduction velocity and stability of Ag<sup>+</sup> in RbAg<sub>4</sub>I<sub>5</sub> films are closely related to the morphology of Ag NW arrays. The irregular electrode interface and apical growth advantage resulted in the fractal dimension of Ag NW arrays prepared with Ag electrodes is 1.69 due to macroscopic dendritic structure. Ag NW arrays have excellent SERS performance due to the many Ag NPs attached to the surface of the closely aligned Ag NWs, the limit of detection (LOD) for Basic Fuchsin (BF) and Crystal Violet (CV) detected by Ag NW arrays SERS substrates prepared with Ag electrodes are as low as 10<sup>−11</sup>and 10<sup>−14</sup>mol/L, respectively. This paper provides a reference for the preparation method of metal nanostructures, Ag NW arrays have good potential for application in the field of trace analysis.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107718"},"PeriodicalIF":3.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424666","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}
Pub Date : 2024-10-09DOI: 10.1016/j.solidstatesciences.2024.107719
Glen R. Hebberd, Budhika G. Mendis, Leon Bowen, Stewart J. Clark, Emma E. McCabe
Oxychalcogenides containing transition metal or p block cations have potential for thermoelectric, photocatalytic and magnetic applications but the synthetic pathways to these quaternary phases are not fully understood. This presents a challenge to the design and preparation of new functional materials. Our combined experimental and computational study of La2O2MQ2 (M = +2 cation; Q = sulfide, selenide anion) systems explores the thermodynamic constraints on synthesis and highlights the subtle balance in stabilities of phases formed via competing reaction pathways.
含有过渡金属或 p 块阳离子的氧化钙苷具有热电、光催化和磁性应用的潜力，但这些四元相的合成途径还不完全清楚。这对设计和制备新型功能材料提出了挑战。我们对 La2O2MQ2（M = +2 阳离子；Q = 硫化物、硒化阴离子）系统进行了实验和计算相结合的研究，探索了合成的热力学限制，并强调了通过相互竞争的反应途径形成的相在稳定性方面的微妙平衡。
{"title":"La2O2MQ2 phases: Stability and synthetic challenges","authors":"Glen R. Hebberd, Budhika G. Mendis, Leon Bowen, Stewart J. Clark, Emma E. McCabe","doi":"10.1016/j.solidstatesciences.2024.107719","DOIUrl":"10.1016/j.solidstatesciences.2024.107719","url":null,"abstract":"<div><div>Oxychalcogenides containing transition metal or p block cations have potential for thermoelectric, photocatalytic and magnetic applications but the synthetic pathways to these quaternary phases are not fully understood. This presents a challenge to the design and preparation of new functional materials. Our combined experimental and computational study of La<sub>2</sub>O<sub>2</sub><em>MQ</em><sub>2</sub> (<em>M</em> = +2 cation; <em>Q</em> = sulfide, selenide anion) systems explores the thermodynamic constraints on synthesis and highlights the subtle balance in stabilities of phases formed via competing reaction pathways.</div></div>","PeriodicalId":432,"journal":{"name":"Solid State Sciences","volume":"157 ","pages":"Article 107719"},"PeriodicalIF":3.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445695","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}
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