Physics of the Solid State最新文献_第6页

Yttrium Doped α-Fe2O3 Nanorods for Enhanced Optoelectronic Properties and Increased Photocurrent Density 掺钇 α-Fe2O3 纳米棒可增强光电特性并提高光电流密度

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-05-13 DOI: 10.1134/S1063783424600407

Lotfi Derbali, Asma Alkabsh, Feriel Bouhjar, Nesrine Zahi

{"title":"Yttrium Doped α-Fe2O3 Nanorods for Enhanced Optoelectronic Properties and Increased Photocurrent Density","authors":"Lotfi Derbali, Asma Alkabsh, Feriel Bouhjar, Nesrine Zahi","doi":"10.1134/S1063783424600407","DOIUrl":"10.1134/S1063783424600407","url":null,"abstract":"Hematite (α-Fe2O3) has received a lot of attention and has potential use in a variety of applications such as energy storage and photovoltaic solar cells despite its short diffusion length and extremely low conductivity. A possible strategy to enhance its structural and optoelectronic properties is element doping. In this work, we report on the successful preparation of α-Fe2O3 nanorods thin film via a simple low-cost hydrothermal process, and the crucial effect of yttrium doping. We analyzed the effects of Y-doping of α-Fe2O3 by varying the amount of yttrium 1, 3, 5, and 8 at %. The optical study revealed that Y-doping reduces the optical band gap, with a shift from 2.11 eV for pure hematite NRs films to 1.94 eV for 5 at % Y-doped NRs. Our study proved that Y-doping obviously reduced the recombination activities in α-Fe2O3 as demonstrated by the photoluminescence study. Amongst all doped α-Fe2O3 NRs films with different Y dopant concentration, the 5 at % exhibited best structural and optoelectronic properties with the highest photocurrent density and incident photon to current efficiency (IPCE). The photocurrent density was increased from 0.25 (undoped) to 1.25 mA/cm2 in the doped NRs with 5 at % Y content at 0.4 V vs. (Ag/AgCl) under illumination, which is 5 times higher than that measured in the pristine α-Fe2O3. The high photo-response of Y-doped NRs in the visible range suggests that the grown NRs thin films are excellent candidates for optoelectronic applications, particularly in solar cells and large light-harvesting devices.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140934952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Elaboration and Characterization of Transparent Electrodes of ZnO Doped Al for Application in Organic Photovoltaic Cells 用于有机光伏电池的氧化锌掺杂铝透明电极的制备与特性分析

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-05-13 DOI: 10.1134/S1063783424600341

T. Ghaitaoui, I. Arbaoui, A. E. Ghaitaoui, Y. Halali, S. Laribi

引用次数: 0

Air Oxidation Disaggregates the Nanodiamond Powder 空气氧化分解纳米金刚石粉末

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-22 DOI: 10.1134/S1063783423600255

Gan Zhiwen, Zhiyin Gan

引用次数: 0

Electronic and Nonlinear Optics Investigation of Bismuthene Nanosheet as a Promising Photocatalyst 铋钌纳米片作为一种前景看好的光催化剂的电子学和非线性光学研究

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-22 DOI: 10.1134/S1063783423600358

Alireza Kokabi, Rasul Mardanian, Shoeib Babaee Touski

引用次数: 0

Structure of Magnesium Doped Yttrium Barium Zirconate as a Novel Compound 掺杂镁的新型锆酸钇钡化合物的结构

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-22 DOI: 10.1134/S1063783423600024

Shahzad Hossain, Md. Masud Parvez, Abdalla M. Abdalla, Mohammed T. Chowdhury, Shafinaz A. Lopa, Iftakhar B. Elius, Cristian D. Savaniu, Juliana H. Zaini, John T. S. Irvine, Abul K. Azad

{"title":"Structure of Magnesium Doped Yttrium Barium Zirconate as a Novel Compound","authors":"Shahzad Hossain, Md. Masud Parvez, Abdalla M. Abdalla, Mohammed T. Chowdhury, Shafinaz A. Lopa, Iftakhar B. Elius, Cristian D. Savaniu, Juliana H. Zaini, John T. S. Irvine, Abul K. Azad","doi":"10.1134/S1063783423600024","DOIUrl":"10.1134/S1063783423600024","url":null,"abstract":"The magnesium doped yttrium barium zirconate, YBa2Zr3 – xMgxO9.5 – δ (0 ≤ x ≤ 0.5) has been prepared by the standard solid-state reaction method and the room temperature X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), particle size analysis (PSA) and thermogravimetric analysis (TGA) have been investigated for phase purity, structural and thermal characterizations. The XRD data of the materials have been indexed with the winXpow software and Rietveld refinements have been done by FullProf suite programarend is found to be double phase of cubic perovskite and a small amount of cubic fluorite. The microstructural parameters such as size, stress, strain, crystal energy are obtained from XRD line broadening data using different models and found that the cubic perovskite phase contributed a large part to the solid solution shows a larger crystallite size of ~212 nm (±13 nm) than its fluorite counterpart which is found to be ~132 nm (±1 nm). The TEM analyses confirm the presence of both phases. The TGA scans in nitrogen environment exhibits stability up to 1000°C. The sizes of the particles from 9 to 13 μm. Scanning electron microscope images reveals that the materials sintered at 1450°C are porous.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140806348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of Magnetic Nanocomposite Photocatalysts Based on Coated Carbon Nanotube for Removing Toxic Dyes 基于涂层碳纳米管的磁性纳米复合光催化剂的制备，用于去除有毒染料

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S1063783423600048

Adil Hussein Abed, Zh. Ebrahiminejad, Said Tehrani-Nasab

{"title":"Fabrication of Magnetic Nanocomposite Photocatalysts Based on Coated Carbon Nanotube for Removing Toxic Dyes","authors":"Adil Hussein Abed, Zh. Ebrahiminejad, Said Tehrani-Nasab","doi":"10.1134/S1063783423600048","DOIUrl":"10.1134/S1063783423600048","url":null,"abstract":"In this article, magnetic nanocomposite photocatalysts based on carbon nanotubes, coated with cobalt ferrite and zinc oxide were prepared using hydrothermal synthesis method. Then, their physical and chemical properties have been investigated using various techniques such as X-ray diffraction, scanning electron microscope, vibrating sample magnetometer and visible-ultraviolet spectroscopic analysis (UV-Vis). In the next step, the photocatalytic activity of the prepared photocatalysts for the removal of toxic dyes under visible light has been investigated. For this purpose, toxic dyes have been removed in the presence of photocatalyst and visible light under specific experimental conditions. It was found that under visible light, longer time is required, but under UV analysis, they degrade within 60 min. Then, using techniques such as UV electron absorption spectroscopy, the extent of dye removal has been measured. The results show that the magnetic nanocomposite photocatalysts based on carbon nanotubes, coated with cobalt ferrite and zinc oxide have high photocatalytic activity for the removal of toxic dyes under visible light. Also, the results show that coating the carbon nanotube with cobalt ferrite has a significant improvement in photocatalytic activity and increasing the amount of cobalt ferrite shows a substantial perfection in the removal of toxic dyes. Also, the magnetic nature of the prepared photocatalysts allows their easy recovery after use.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lattice Thermal Conductivity of Silicon and Germanium Core/Shell and Segmented Nanowires 硅和锗核/壳纳米线及分段纳米线的晶格导热率

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S1063783424600456

C. I. Isacova, N. D. Zincenco, I. B. Boris, D. L. Nika

{"title":"Lattice Thermal Conductivity of Silicon and Germanium Core/Shell and Segmented Nanowires","authors":"C. I. Isacova, N. D. Zincenco, I. B. Boris, D. L. Nika","doi":"10.1134/S1063783424600456","DOIUrl":"10.1134/S1063783424600456","url":null,"abstract":"We investigated the phonon and thermal properties of the silicon- and germanium-nanowires, covered by SixGe1–x, plastic, diamond and SiO2 shells as well as Si-based segmented nanowires, consisting of segments of different sizes and/or materials. Acoustic phonon energies were calculated in the framework of the face-centered cubic cell model of the lattice vibrations, while thermal conductivity was investigated in the framework of Boltzmann transport equation approach within the relaxation time approximation. It was shown, that claddings with higher (lower) sound velocity strongly affect the phonon energy spectra and increase (decrease) the average phonon group velocity in core nanowire. It was demonstrated, that redistribution of the phonon modes in Si/Ge and Si/SiO2 segmented nanowires leads to a localization of the great amount of the phonon modes in nanowire segments, resulting in exclusion of such modes from the heat flow and suppression of the phonon thermal conduction (by a factor of 2–8) in comparison with generic silicon nanowires. Low values of the thermal conductivity of segmented nanowires make them prospective for thermoelectric and thermoinsulating applications.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Piezoelectricity of AlScN Thin Films under High-Pressure Regime 高压条件下 AlScN 薄膜的压电性

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S1063783423600309

Fares Kanouni, Fahima Arab, Saad Amara, Khaled Bouamama, Mohamed Halit

{"title":"The Piezoelectricity of AlScN Thin Films under High-Pressure Regime","authors":"Fares Kanouni, Fahima Arab, Saad Amara, Khaled Bouamama, Mohamed Halit","doi":"10.1134/S1063783423600309","DOIUrl":"10.1134/S1063783423600309","url":null,"abstract":"This study investigated the structural, mechanical, piezoelectric, and electromechanical properties of AlScN thin films using density functional theory (DFT) under varying levels of applied pressure, ranging from 0 to 20 GPa. The primary focus of this research is to explore the feasibility of optimizing AlScN thin films for surface acoustic wave (SAW) applications through pressure-induced modifications. Our findings reveal two significant outcomes. First, we observe a notable increase in the elastic constant C33 as a function of pressure. This increase signifies a substantial enhancement in material stiffness, directly influencing wave propagation and velocity within the thin films. Second, a remarkable 68% improvement in the piezoelectric constant, d33, is identified for Al0.75Sc0.25N at an applied pressure of 20 GPa compared to Al0.75Sc0.25N at 0 GPa. This enhancement has a profound impact on the electromechanical coupling characteristics of the material. These results underscore the potential for tuning the piezoelectric response of AlScN thin films using applied pressure, offering a promising avenue for enhancing the performance of SAW-based AlScN devices.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic Structure, Elastic, and Thermodynamic Properties of AgMO3 (M = Nb, Ta) AgMO3 （M = Nb、Ta）的电子结构、弹性和热力学性质

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S106378342360019X

K. Ganga Prasad

引用次数: 0

Tailoring the Optical Characteristics of ZnO Nanoparticles by Fe/Co Dual-Doping 通过铁/钴双掺杂调整氧化锌纳米粒子的光学特性

IF 0.9 4区物理与天体物理

Physics of the Solid State Pub Date : 2024-04-01 DOI: 10.1134/S1063783423600413

Basmah J. Alotibi, Aicha Loucif, Abdul Majid

{"title":"Tailoring the Optical Characteristics of ZnO Nanoparticles by Fe/Co Dual-Doping","authors":"Basmah J. Alotibi, Aicha Loucif, Abdul Majid","doi":"10.1134/S1063783423600413","DOIUrl":"10.1134/S1063783423600413","url":null,"abstract":"The purpose of this study was to investigate the influence of dual doping with Fe and Co on the microstructural, morphological, and optical properties of ZnO nanoparticles (NPs). Zn0.97–xFe0.03CoxO (x = 0, 0.01, 0.02, and 0.03) NPs were prepared via a solid-state reaction method using high-purity ZnO, Fe, and Co NPs. This study was performed using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), UV-visible spectrophotometry, photoluminescence (PL), and energy-dispersive X‑ray spectroscopy (EDS). XRD analysis revealed that all samples presented a pure hexagonal wurtzite str-ucture without any trace of Fe, Co, or their oxides, indicating that the dopant ions were well-substituted Zn ions. However, some peaks appear in the spectrum of the Zn0.94Fe0.03Co0.03O sample, corresponding to the secondary spinel phases ZnCo2O4 and CoFe2O4. FE-SEM micrographs showed that all samples exhibited sphere-like particles, and their sizes, aggregation degree, and morphology were slightly influenced by the dopant content. The estimated bandgap values decreased from 3.24 eV for undoped ZnO to 3.17 eV for Zn0.95Fe0.03Co0.02O NPs and then slightly increased. Moreover, the refractive index was evaluated from the bandgap energy using Moss, Ravindra Hervé-Vandamme, and Reddy models, and then compared. The PL spectra of all samples revealed strong and sharp emission peaks in the UV region, which increased in intensity as the Co content increased.","PeriodicalId":731,"journal":{"name":"Physics of the Solid State","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140569899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0