Journal of Physics and Chemistry of Solids最新文献

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Tailoring spin-polarized properties of HfFeX (X = Sn, Ge) half-Heusler alloys for spintronic and optoelectronic applications via DFT HfFeX (X = Sn, Ge)半heusler合金在自旋电子和光电子应用中的自旋极化特性
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-07 DOI: 10.1016/j.jpcs.2026.113574
Pratiksha Meena , J B Sudharsan , Nithyanandan Kanagaraj
{"title":"Tailoring spin-polarized properties of HfFeX (X = Sn, Ge) half-Heusler alloys for spintronic and optoelectronic applications via DFT","authors":"Pratiksha Meena ,&nbsp;J B Sudharsan ,&nbsp;Nithyanandan Kanagaraj","doi":"10.1016/j.jpcs.2026.113574","DOIUrl":"10.1016/j.jpcs.2026.113574","url":null,"abstract":"<div><div>In this study, we use first-principles simulations to investigate the electrical, magnetic, mechanical, and thermoelectric properties of the half-Heusler alloys HfFeSn and HfFeGe. The equilibrium lattice constants for HfFeX (X = Sn, Ge) were found to be 6.2148 and 5.9505 Å, respectively, after structural optimization of these compounds. Both materials’ dynamical stability is confirmed by phonon dispersion analysis, and their mechanical stability is indicated by the obtained elastic constants. We used both the GGA and TB-mBJ exchange–correlation functionals to study the electronic structure. At the Fermi level, the density of states exhibits full spin polarization. Additionally, the presence of a finite band gap in the spin-down channel, which indicates semiconducting nature, and metallic behavior in the spin-up channel, confirms the half-metallic behavior. In their most stable configuration, the half-Heusler compounds display ferromagnetic ordering, with the vanadium atoms primarily responsible for this magnetism. Furthermore, an evaluation of the thermoelectric performance produced remarkable figure of merit values of 0.45 for HfFeSn and 0.50 for HfFeGe at 1000 K. These findings imply that the materials under investigation have a great deal of promise for use in spintronic and thermoelectric technologies.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113574"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191444","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}
引用次数: 0
Doping-driven structural and electronic modulation in Tripentaphene Nanocarbon allotrope 掺杂驱动三五苯纳米碳同素异形体的结构和电子调制
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-02 DOI: 10.1016/j.jpcs.2026.113563
Sidney M.G. dos Santos , Vitor J.R. Coutinho , Janaína C. Silva , Paloma V. Silva , Eduardo C. Girão , Ramon S. Ferreira
{"title":"Doping-driven structural and electronic modulation in Tripentaphene Nanocarbon allotrope","authors":"Sidney M.G. dos Santos ,&nbsp;Vitor J.R. Coutinho ,&nbsp;Janaína C. Silva ,&nbsp;Paloma V. Silva ,&nbsp;Eduardo C. Girão ,&nbsp;Ramon S. Ferreira","doi":"10.1016/j.jpcs.2026.113563","DOIUrl":"10.1016/j.jpcs.2026.113563","url":null,"abstract":"<div><div>Tripentaphenes (TPHs) are two-dimensional carbon allotropes composed of periodically arranged acepentalene units. Using density functional theory, we examine boron- and nitrogen-doped TPHs, revealing that substitutional doping slightly modifies lattice parameters—boron expanding and nitrogen contracting—while preserving energetic stability. Electronic behavior depends on structural configuration: <span><math><mi>α</mi></math></span>- and <span><math><mi>σ</mi></math></span>-TPHs remain metallic or semimetallic, whereas <span><math><mi>β</mi></math></span>-TPHs exhibit tunable semiconducting gaps. Effective mass analysis for gapped systems shows pronounced anisotropy, with <span><math><mi>β</mi></math></span>-/<span><math><mi>σ</mi></math></span>-co-doped systems displaying large off-diagonal tensor elements, indicating direction-dependent transport and mobility. Raman spectra of semiconducting <span><math><mi>β</mi></math></span>-TPHs reveal dopant-specific fingerprints: boron doping induces red-shifted <span><math><mi>G</mi></math></span>-like modes, nitrogen introduces dopant-induced symmetry-breaking breathing-like vibrations analogous to the <span><math><mi>D</mi></math></span> band, and co-doping generates complex mixed modes, including high-frequency modes. These results highlight <span><math><mi>β</mi></math></span>-TPHs as promising anisotropic semiconductors for 2D electronics and optoelectronics, with metallic <span><math><mi>α</mi></math></span>- and <span><math><mi>σ</mi></math></span>-phases serving as potential contact layers.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113563"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116398","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}
引用次数: 0
Boosting the performance of irregular Si particles for lithium storage by simultaneously integrating with Sn and carbon 通过与锡和碳同时集成,提高不规则硅颗粒的锂存储性能
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.jpcs.2026.113592
Chao Li , Yiming Yu , Jiaqin Huang , Guanglan Zhuo , Jizhang Chen , Qinghua Tian
{"title":"Boosting the performance of irregular Si particles for lithium storage by simultaneously integrating with Sn and carbon","authors":"Chao Li ,&nbsp;Yiming Yu ,&nbsp;Jiaqin Huang ,&nbsp;Guanglan Zhuo ,&nbsp;Jizhang Chen ,&nbsp;Qinghua Tian","doi":"10.1016/j.jpcs.2026.113592","DOIUrl":"10.1016/j.jpcs.2026.113592","url":null,"abstract":"<div><div>Silicon (Si) materials are gaining prominence as promising anodes for high-energy lithium-ion batteries (LIBs). However, the grievous volume fluctuation and poor electronic conductivity of Si during the cycling process prevent the practical application of Si anodes in LIBs. Herein, the ultrasmall SnO<sub>2</sub>/Sn nanoparticles (∼3.72 nm) and carbon coating are simultaneously integrated onto the surfaces of the irregular Si particles by a facile hydrothermal and subsequent annealing method to form Si@SnO<sub>2</sub>/Sn@C composite. The findings authenticate that Si@SnO<sub>2</sub>/Sn@C has improved lithium storage capacity and enhanced cycling durability compared to unmodified Si, Si@SnO<sub>2</sub>/Sn and Si@C. This underscores the critical role of the simultaneous integration of SnO<sub>2</sub>/Sn nanoparticles and carbon coating in improving electrochemical performances of Si particles. The combination of Sn, carbon coating and <em>in-situ</em> formed Li<sub><em>x</em></sub>Sn not only upgrades the electronic conductivity and ionic transport ability, but also mitigates the volume expansion and forms a LiF-rich solid electrolyte interphase (SEI) during the cycling. Consequently, the Si@SnO<sub>2</sub>/Sn@C exhibits excellent performance with reversible 1182.5 and 981.3 mAh g<sup>−1</sup> after 700 cycles at 400 and 1000 mA g<sup>−1</sup>, and reversible 614.2 and 401.5 mAh g<sup>−1</sup> after 1800 cycles at 1000 and 5000 mA g<sup>−1</sup>, respectively. These findings may provide useful references for exploiting advanced Si anode materials.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113592"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191865","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}
引用次数: 0
DFT study of hydrogen production from formic acid decomposition on PdM/graphene (M=Ni, Cd, Ag, Co, Cr, Mn, Fe): Kinetics and mechanism PdM/石墨烯(M=Ni, Cd, Ag, Co, Cr, Mn, Fe)上甲酸分解制氢的DFT研究:动力学和机理
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-04 DOI: 10.1016/j.jpcs.2026.113577
Azar Gharib, Ali Arab
{"title":"DFT study of hydrogen production from formic acid decomposition on PdM/graphene (M=Ni, Cd, Ag, Co, Cr, Mn, Fe): Kinetics and mechanism","authors":"Azar Gharib,&nbsp;Ali Arab","doi":"10.1016/j.jpcs.2026.113577","DOIUrl":"10.1016/j.jpcs.2026.113577","url":null,"abstract":"<div><div>This study investigates the structural, electronic, and catalytic properties of PdM (M = Ni, Cd, Ag, Co, Cr, Mn, Fe) bimetallic-doped graphene nanosheets (G-PdM) for formic acid (FA) decomposition via <em>DFT</em> calculations in both gas and aqueous phases. Binding energy analysis reveals that G-PdMn exhibits the strongest metal-graphene interaction (−14.20 eV in solution), while G-PdCd shows the weakest (−1.45 eV in gas phase). Mechanistic studies of FA decomposition for hydrogen production via the carboxyl pathway reveal that C–H bond activation is the rate-limiting step, with G-PdFe exhibiting the highest catalytic activity in the gas phase (k<sub>1</sub> = 3.82 × 10<sup>7</sup> s <sup>−1</sup>, Δ<em>G</em><sup>‡</sup> = 29.74 kJ/mol). In contrast, G-PdAg shows severe solvent inhibition (<em>k</em><sub>1</sub> = 9.30 × 10<sup>−70</sup> s<sup>−1</sup> in solution). Thermodynamic and kinetic analyses demonstrate that solvent has a significant influence on reaction barriers, with aqueous-phase entropic penalties (e.g., Δ<em>S</em><sup>‡</sup> = 1229.70 J/mol K for G-PdNi) altering catalytic performance. These findings highlight G-PdFe, G-PdMn, and G-PdNi as optimal candidates for hydrogen production, offering insights for designing efficient graphene-based catalysts.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113577"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116400","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}
引用次数: 0
Enhancement of phase change memory properties of GeTe films through GeS 2 incorporation 加入ge2增强GeTe薄膜的相变记忆性能
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-01-27 DOI: 10.1016/j.jpcs.2026.113559
Abdul Whab, Shahin Parveen, Nidhi Bhatt, Pumlianmunga
{"title":"Enhancement of phase change memory properties of GeTe films through GeS 2 incorporation","authors":"Abdul Whab,&nbsp;Shahin Parveen,&nbsp;Nidhi Bhatt,&nbsp;Pumlianmunga","doi":"10.1016/j.jpcs.2026.113559","DOIUrl":"10.1016/j.jpcs.2026.113559","url":null,"abstract":"<div><div>Phase change memory (PCM) materials are a promising candidate for non-volatile memory and neuromorphic applications due to their switching properties between amorphous and crystalline states. In the present investigation, we have studied <span><math><mi>(GeTe)</mi></math></span> <sub>1-x</sub> (<span><math><mi>GeS</mi></math></span> <sub>2</sub>)<sub>x</sub>(x <span><math><mo>=</mo></math></span> 0, 0.07, 0.14, 0.21) films. A single-step transition is observed in the resistance versus temperature measurement. After the incorporation of <span><math><mi>GeS</mi></math></span> <sub>2</sub>, the crystallization temperature increased from 179 °C to 319 °C (x <span><math><mo>=</mo></math></span> 0.21), the ten-year data retention temperature and the activation energy were raised from 102 °C to 3213 °C, and 2.48 eV to 3.08 eV(x <span><math><mo>=</mo></math></span> 0.21), respectively. The threshold current (<span><math><mi>I</mi></math></span> <sub>th</sub>) was reduced from 0.94 mA to 0.44 mA, which will reduce power consumption. All of the films crystallized with a rhombohedral structure. X-ray photoelectron spectroscopy (XPS) confirms the presence of Ge-S bonds, which localizes the charge carrier and increases the optical band gap (<span><math><mi>E</mi></math></span> <sub>g</sub>) from 0.62 eV(GeTe) to 0.84 eV (x <span><math><mo>=</mo></math></span> 0.21). For data storage and high temperature PCM applications, <span><math><mi>(GeTe)</mi></math></span> <sub>1-x</sub> (<span><math><mi>GeS</mi></math></span> <sub>2</sub>)<sub>x</sub>(x <span><math><mo>=</mo></math></span> 0, 0.07, 0.14, 0.21) is a promising candidate due to its high thermal stability, widening band gap, high resistance contrast, and improved data retention temperature.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113559"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116401","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}
引用次数: 0
Achieving high power-conversion efficiency of MASnI3/CuGaSe2 lead-free perovskite solar cells 实现高功率转换效率的MASnI3/CuGaSe2无铅钙钛矿太阳能电池
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.jpcs.2026.113573
Nourelhouda Mekhaznia , Beddiaf Zaidi , Ahmet Sait Alali , Ali Barkhordari
{"title":"Achieving high power-conversion efficiency of MASnI3/CuGaSe2 lead-free perovskite solar cells","authors":"Nourelhouda Mekhaznia ,&nbsp;Beddiaf Zaidi ,&nbsp;Ahmet Sait Alali ,&nbsp;Ali Barkhordari","doi":"10.1016/j.jpcs.2026.113573","DOIUrl":"10.1016/j.jpcs.2026.113573","url":null,"abstract":"<div><div>Lead-free perovskite combined with chalcogenide thin films such as CIGS compounds present viable alternatives for sustainable photovoltaic fabrication. This study investigates and optimizes a dual-absorber solar cell based on the FTO/TiO<sub>2</sub>/MASnI<sub>3</sub>/CGS/Ag structure using SCAPS-1D simulations. The perovskite band gap was tuned by adjusting the halide composition to determine the optimal value for maximizing power conversion efficiency, followed by systematic optimization of absorber thickness, acceptor density, defect density, series/shunt resistances, and operating temperature. The optimized device achieved an efficiency of 32.26%, open-circuit voltage (V<sub>OC</sub>) of 1.13 V, short-circuit current density (J<sub>SC</sub>) of 34.90 mA/cm<sup>2</sup> and fill factor (FF) of 81.55%. These findings validate the potential of integrating lead-free perovskites with CGS to advance sustainable photovoltaic technologies.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113573"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191445","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}
引用次数: 0
Realizing favorable synergism towards efficient oxygen evolution reaction with CuO nanoparticles anchored defect engineered graphene 与CuO纳米颗粒锚定缺陷工程石墨烯实现有利的协同作用,促进高效析氧反应
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.jpcs.2026.113578
Kabir Hussain Badagoppam Haroon , Hemanth Kumar Beere , Suman Kalyan Sahoo , Hemavathi Nj , Susanta Kumar Bhunia , Debasis Ghosh
{"title":"Realizing favorable synergism towards efficient oxygen evolution reaction with CuO nanoparticles anchored defect engineered graphene","authors":"Kabir Hussain Badagoppam Haroon ,&nbsp;Hemanth Kumar Beere ,&nbsp;Suman Kalyan Sahoo ,&nbsp;Hemavathi Nj ,&nbsp;Susanta Kumar Bhunia ,&nbsp;Debasis Ghosh","doi":"10.1016/j.jpcs.2026.113578","DOIUrl":"10.1016/j.jpcs.2026.113578","url":null,"abstract":"<div><div>Herein, we demonstrate a P-doped defective reduced graphene oxide (PDrGO), uniformly decorated with CuO nanocrystals (CuO/PDrGO-A) as a high performance noble metal free electrocatalyst for OER in alkaline condition. The composite was synthesized via task specific defect engineering of reduced graphene oxide and doping it with phosphorous (PDrGO), and decorating it with CuO nanocrystals via a reflux method followed by annealing. The formation of the composites (CuO/PDrGO-A) was confirmed via different structural (XRD, XPS, Raman) and morphological characterization (FESEM) techniques. The OER performance was studied in 1 M KOH, which exhibited a considerably low overpotential of CuO/PDrGO-A exhibited a notably low overpotential of 351 mV (100% iR corrected, and 377 mV overpotential for without iR correction) at 10 mA cm<sup>−2</sup>, a low Tafel slope of 38 mV dec<sup>−1</sup>, and enhanced charge transfer kinetics. The catalyst also showed excellent durability with a minimal current decay of 11.5% over a long term chronoamperometric operation over 48 h. The performance was significantly higher than many other previously reported Cu based composites electrocatalyst, revealing a favorable synergism between the PDrGO and CuO towards pushing the performance limits of the existing Cu based OER electrocatalysts.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113578"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191443","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}
引用次数: 0
Radiation response of Er3+-doped SrF2 translucent ceramics Er3+掺杂SrF2半透明陶瓷的辐射响应
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-01-30 DOI: 10.1016/j.jpcs.2026.113567
Naoki Kawano , Takumi Kato , Luiz G. Jacobsohn , Daisuke Nakauchi , Kai Okazaki , Kensei Ichiba , Toshiaki Kunikata , Akihiro Nishikawa , Keiichiro Miyazaki , Takayuki Yanagida
{"title":"Radiation response of Er3+-doped SrF2 translucent ceramics","authors":"Naoki Kawano ,&nbsp;Takumi Kato ,&nbsp;Luiz G. Jacobsohn ,&nbsp;Daisuke Nakauchi ,&nbsp;Kai Okazaki ,&nbsp;Kensei Ichiba ,&nbsp;Toshiaki Kunikata ,&nbsp;Akihiro Nishikawa ,&nbsp;Keiichiro Miyazaki ,&nbsp;Takayuki Yanagida","doi":"10.1016/j.jpcs.2026.113567","DOIUrl":"10.1016/j.jpcs.2026.113567","url":null,"abstract":"<div><div>SrF<sub>2</sub> translucent ceramics with ErF<sub>3</sub> molar concentrations of 0.1 % (0.1 %ErF<sub>3</sub>–SrF<sub>2</sub>), 0.5 % (0.5 %ErF<sub>3</sub>–SrF<sub>2</sub>), and 1.0 % (1.0 %ErF<sub>3</sub>–SrF<sub>2</sub>) were fabricated for ionizing radiation measurements with particular emphasis on the near infrared emission. Photoluminescence and scintillation due to the electronic transitions between 4f energy levels in Er<sup>3+</sup> appeared in the visible and near-infrared spectral range. A weak broadband scintillation peak at around 312 nm was also observed under X-ray excitation. The highest quantum yield in photoluminescence was observed from the 1.0 %ErF<sub>3</sub>–SrF<sub>2</sub>. The minimum detectable dose rate under X-ray irradiation was evaluated with a InGaAs photodiode for near-infrared scintillators with 1.0 %ErF<sub>3</sub>–SrF<sub>2</sub> showing the most intense near-infrared scintillation dose rate of 0.5 mGy/h. Thermoluminescence glow curves were also obtained by recording the thermoluminescence signal in the visible wavelength range. Thermoluminescence intensity decreased with increasing the ErF<sub>3</sub> doping level, and the lowest measurable dose for 0.1 %ErF<sub>3</sub>–SrF<sub>2</sub> was 0.1 mGy.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113567"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116399","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}
引用次数: 0
Exploring the effects of oxygen replacement by sulfur in SrTiO3: A comprehensive DFT investigation 硫代氧对SrTiO3中氧的影响:一种全面的DFT研究
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-03 DOI: 10.1016/j.jpcs.2026.113575
Łukasz Szeleszczuk , Katarzyna Mądra-Gackowska , Marcin Gackowski
{"title":"Exploring the effects of oxygen replacement by sulfur in SrTiO3: A comprehensive DFT investigation","authors":"Łukasz Szeleszczuk ,&nbsp;Katarzyna Mądra-Gackowska ,&nbsp;Marcin Gackowski","doi":"10.1016/j.jpcs.2026.113575","DOIUrl":"10.1016/j.jpcs.2026.113575","url":null,"abstract":"<div><div>This paper is based on the first-principles density functional (DFT) to investigate systematically the structure, mechanical, electronic, optical and thermal behavior of SrTiO<sub>3-<em>x</em></sub>S<sub><em>x</em></sub>. The structural optimizations of all the compounds indicated that they were dynamically and mechanically stable. Sulfur substitution at the oxygen site was modeled using a supercell approach. Substituting oxygen with sulfur causes lattice expansion, which weakens the bonding interactions and consequently leads to a reduction in both the elastic moduli and Debye temperature. HSE06 functional calculations demonstrated a positive change in value of the band gap as SrTiO<sub>3</sub>, SrTiO<sub>2</sub>S, SrTiOS<sub>2</sub> and SrTiS<sub>3</sub> were utilized with the following successive decrease of band gap of 2.737 eV, 1.584 eV, 0.784 eV, and 0.288 eV respectively. The band gap of SrTiO<sub>2</sub>S (1.584 eV) closely matches the Shockley–Queisser limit, highlighting its strong potential for efficient photovoltaic applications. Optical analysis revealed an increase in dielectric constant, refractive index and absorption at the visible light with increase in the amount of sulfur content. The quasi-harmonic Debye model predicts the thermal properties, revealing that sulfur substitution leads to an increase in both the Grüneisen parameter and the thermal expansion coefficient, accompanied by a significant decrease in the melting temperature. The lattice thermal conductivity (<em>K</em><sub><em>Ph</em></sub>) drops sharply from 62.03 W/mK for SrTiO<sub>3</sub> to 5.53 W/mK SrTiS<sub>3</sub>. The minimum thermal conductivity values of S-rich compounds are low and it means that they can be used as thermal barrier coating materials. Overall, sulfur incorporation effectively tunes the mechanical stiffness, electronic band gap, and thermal transport properties, rendering SrTiO<sub>2</sub>S and SrTiS<sub>3</sub> promising candidates for efficient optoelectronic and high-temperature energy device applications.</div></div>","PeriodicalId":16811,"journal":{"name":"Journal of Physics and Chemistry of Solids","volume":"213 ","pages":"Article 113575"},"PeriodicalIF":4.9,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146116402","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}
引用次数: 0
Pressure-driven modulation of the photocatalytic properties of BaGaO3: A first-principles investigation 压力驱动调制BaGaO3光催化性能:第一性原理研究
IF 4.9 3区 材料科学
Journal of Physics and Chemistry of Solids Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.jpcs.2026.113593
Muhammad Rizwan , Farhana Ahmad , Syed Shahbaz Ali , Abu Bakr Amin , YangWei Wang , Hamza Naeem
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