Crystal Research and Technology最新文献_第2页

Issue Information: Crystal Research and Technology 1'2025

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-01-08 DOI: 10.1002/crat.202570001

引用次数: 0

Research Progress on Stability of FAPbI3 Perovskite Solar Cells

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2025-01-08 DOI: 10.1002/crat.202400228

Wenxin Deng, Jianwei Wei, Zengwei Ma, Wenlin Feng

{"title":"Research Progress on Stability of FAPbI3 Perovskite Solar Cells","authors":"Wenxin Deng, Jianwei Wei, Zengwei Ma, Wenlin Feng","doi":"10.1002/crat.202400228","DOIUrl":"https://doi.org/10.1002/crat.202400228","url":null,"abstract":"The formamidinium lead iodide (FAPbI3) perovskite has emerged as a promising material for high-efficiency photovoltaic applications. Although a power conversion efficiency of more than 26% has been achieved, stability issues have hindered its commercial application. In this study, the stability of FAPbI3 under adverse conditions such as humidity, oxygen, ultraviolet light, and temperature fluctuations is systematically reviewed. The known effective strategies for improving stability are discussed. Current studies have shown that technologies such as doping, halide alloying, additive manufacturing engineering, and interface modification have been identified as effective in mitigating phase transitions of FAPbI3 and enhancing environmental durability. Encapsulation technology further improves moisture and heat resistance. Compared with other stabilization strategies, doping and alloying can address the adverse effects of narrowing of the absorption edge. Interface engineering has an essential understanding of the stability mechanism, which will greatly improve the stability problem in the practical application of FAPbI3. This paper also looks forward to the future research directions and development trends.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A DFT Based Screening of the Electronic, Structural, Transport, Thermodynamic, and Optical Features of Potassium-based K2InAsCl6 Double Perovskites for Renewable Energies 基于 DFT 的用于可再生能源的钾基 K2InAsCl6 双包晶石的电子、结构、传输、热力学和光学特征筛选

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-31 DOI: 10.1002/crat.202400184

Quratul Ain, Junaid Munir, Hudabia Murtaza, Abdullah S. Aldwayyan, Hamid M. Ghaithan, Abdullah Ahmed Ali Ahmed, Saif M. H. Qaid

{"title":"A DFT Based Screening of the Electronic, Structural, Transport, Thermodynamic, and Optical Features of Potassium-based K2InAsCl6 Double Perovskites for Renewable Energies","authors":"Quratul Ain, Junaid Munir, Hudabia Murtaza, Abdullah S. Aldwayyan, Hamid M. Ghaithan, Abdullah Ahmed Ali Ahmed, Saif M. H. Qaid","doi":"10.1002/crat.202400184","DOIUrl":"https://doi.org/10.1002/crat.202400184","url":null,"abstract":"Nowadays, double perovskite materials are playing an exceptional role in the field of optoelectronics, spintronics, and photovoltaics as they exhibit outstanding characteristics. In the present work, a comprehensive examination of the mechanical, electrical, optical, thermal, and structural characteristics of the K2InAsCl6 double perovskite complex is conducted by using the density functional theory via Wien2k software. The K2InAsCl6 exhibits structural, thermodynamic, and mechanical stability which is evaluated through several parameters. The K2InAsCl6 possess a direct band gap of 0.5 eV which is also endorsed by the total density of states (DOS). The K2InAsCl6 exhibits ductile character and longitudinal waves are found to be predominate over transverse waves. Furthermore, the optical analysis indicates that the material's intricate electrical configuration is suitable for significant optical activity across the visible spectrum. The versatility of K2InAsCl6 is well-proven by its robust thermal and mechanical properties. It exhibits excellent ZT value (0.92) at room temperature which confirms its potential for green energy applications.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Molecular Simulations of Stereocomplex Crystallization in Grafted Diblock Copolymers 接枝二嵌段共聚物中立体复合物结晶的分子模拟

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-31 DOI: 10.1002/crat.202400187

Junjie Ma, Yupeng Chen, Jianyu Chen, Yongqiang Ming, Yijing Nie

引用次数: 0

Dielectric and Thermal Behavior of Al-Doped Cobalt Titanate Nanoparticles

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-31 DOI: 10.1002/crat.202400183

K. Bharathi, K. Chandra Babu Naidu, D. Baba Basha, Madunuri Chandrasekhar, L. Siva Sankara Reddy

{"title":"Dielectric and Thermal Behavior of Al-Doped Cobalt Titanate Nanoparticles","authors":"K. Bharathi, K. Chandra Babu Naidu, D. Baba Basha, Madunuri Chandrasekhar, L. Siva Sankara Reddy","doi":"10.1002/crat.202400183","DOIUrl":"https://doi.org/10.1002/crat.202400183","url":null,"abstract":"The AlxCo1-xTiO3+δ (x = 0.2, 0.4, 0.6 & 0.8) (ACTO) nanoparticles are synthesized via hydrothermal method at low operating temperature of 423 K/8 h. The diiffraction patterns confirm the tetragonal phases of ACTO along with the secondary phases (*Co3O4). The morphology shows the homogeneous distribution of nanoparticles. In addition, for x = 0.2–0.4, a = b & c values are found to be decreasing from 0.3776 to 0.3771 nm & 0.8887–0.8878 nm, respectively, while for x = 0.6–0.8, the same values are found to be decreasing from 0.3780 to 0.3778 nm & 0.8881–0.8879 nm, respectively. The M–H curves provide the pure paramagnetic nature for x = 0.6 & 0.8 while the weak ferromagnetic nature for x = 0.2 & 0.4. At 8 MHz, the ɛ′ value of x = 0.2 (high cobalt content) shows the stabilized ɛ′ of ≈32.5 and the ɛ″ values of ACTO are changing from ≈1.6–10.6. Therefore, the x = 0.2 shows the high ɛ′ & ɛ″ suitable for high frequency dielectric absorber applications. The exponent “n” values determined using power law fit are noted to be increasing from 0.512 to 0.852 for x = 0.2–0.6 while the same is decreased to 0.664 for x = 0.8. All the “n” values are less than one and shows that the polaron hopping is slower than site relaxation. The mass loss, decomposition of various ingredient species, and other transition temperatures are evaluated by thermal study.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 3","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143612423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Crystallization of α and β Polymorphs of Para Aminobenzoic Acid from Mixed Solvents by Slow Evaporation Method 用缓慢蒸发法从混合溶剂中结晶对氨基苯甲酸的 α 和 β 多晶体

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-31 DOI: 10.1002/crat.202400216

Ansu Mathew, Madhumitha Madhesh, Srinivasan Karuppannan

{"title":"Crystallization of α and β Polymorphs of Para Aminobenzoic Acid from Mixed Solvents by Slow Evaporation Method","authors":"Ansu Mathew, Madhumitha Madhesh, Srinivasan Karuppannan","doi":"10.1002/crat.202400216","DOIUrl":"https://doi.org/10.1002/crat.202400216","url":null,"abstract":"Para aminobenzoic acid (p-ABA), a well-known pharmaceutical material with a challenging polymorphic nature, is chosen for study in this paper. The material has four reported polymorphs, containing two solution forms (α and β), a vapor form, and a high-pressure form. The solution-grown forms α and β are experimentally grown using mixed solvents of water and isopropyl alcohol with nine different mixing compositions at temperatures of 298, 303, and 308 K. The solubility of the commercially available p-ABA is calculated gravimetrically, and the polymorphic crystals are grown using the slow solvent evaporation method for all the mixing ratios at different temperatures. A ternary diagram constructed on the solubility of p-ABA in mixed solvents gives an insight into the nucleation nature of two polymorphs. To understand the nature of nucleation and growth of two forms of p-ABA, an in situ microscopic study is carried out, and the grown crystals are characterized using powder X-ray diffraction analysis and differential scanning calorimetry. This also confirmed that the grown crystals are two solutions grown polymorphs of para aminobenzoic acid, both belonging to monoclinic systems with P21/n space group.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Bulk Growth, Thermal, and Polarized Spectral Characters of Nd3+-Doped Ca3(BO3)2 Single Crystals

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-31 DOI: 10.1002/crat.202400230

Pingzhang Yu, Hongwei Qi, Yanqing Liu, Fapeng Yu, Zhengping Wang, Yangyang Dang

{"title":"Bulk Growth, Thermal, and Polarized Spectral Characters of Nd3+-Doped Ca3(BO3)2 Single Crystals","authors":"Pingzhang Yu, Hongwei Qi, Yanqing Liu, Fapeng Yu, Zhengping Wang, Yangyang Dang","doi":"10.1002/crat.202400230","DOIUrl":"https://doi.org/10.1002/crat.202400230","url":null,"abstract":"The growth, ion concentrations, powder X-ray diffraction, thermal properties, and optical spectroscopy of Nd3⁺-doped Ca₃(BO₃)₂ single crystals are investigated. The Nd3+-doped Ca₃(BO₃)₂ single crystals with 1.97 at.% Nd3⁺ are successfully grown using the Czochralski (Cz) technique. To address the chemical valence imbalance between Nd3⁺ and Ca2⁺ in the Ca₃(BO₃)₂ crystals, the Na⁺ ions are introduced. The concentrations of Nd3⁺ and Na⁺ ions in the as-grown crystals are measured using inductively coupled plasma atomic emission spectroscopy (ICP-AES), yielding concentrations of 1.97 at% (N0 = 1.55 × 1020 cm−3), 1.94 at% (N0 = 1.52 × 1020 cm−3), respectively. The thermal behavior of the Nd3⁺-doped Ca3(BO3)2 crystals, including thermal expansion coefficients, specific heat, and thermogravimetric and differential thermal analysis (TG-DTA), is systematically investigated. At room temperature, the polarized absorption spectra, polarized fluorescence spectra, and fluorescence decay lifetimes are measured. Spectral parameters, including polarized absorption and stimulated emission cross-sections, intensity parameters, transition probabilities, radiative lifetime, and branching ratios are determined using the Judd-Ofelt (J-O) theory. The results indicate that Nd3+-doped Ca3(BO3)2 crystals are promising materials for near-infrared lasers, offering advantages such as rapid growth, large size, high specific heat, strong emission, and environmental stability.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143362920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of Voltage on Two-Step Micro-Arc Oxide Film of Mg-13Gd-4Y-2Zn-0.5Zr Alloy

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-25 DOI: 10.1002/crat.202400214

Dalong Li, Wei Chen, ChangWei Li, Xin Jing, Kun Sun, Jiaqing Fan, Huagui Huang

{"title":"Effect of Voltage on Two-Step Micro-Arc Oxide Film of Mg-13Gd-4Y-2Zn-0.5Zr Alloy","authors":"Dalong Li, Wei Chen, ChangWei Li, Xin Jing, Kun Sun, Jiaqing Fan, Huagui Huang","doi":"10.1002/crat.202400214","DOIUrl":"https://doi.org/10.1002/crat.202400214","url":null,"abstract":"Rare earth alloying is one of the effective ways to improve the performance of magnesium alloys, but strong galvanic corrosion occurs when rare earth magnesium alloys meet corrosive substances. To improve the corrosion resistance of rare earth magnesium alloys, this article takes Mg-13Gd-4Y-2Zn-0.5Zr rare earth magnesium alloy as the research object. First, a one-step micro arc oxidation process is used to obtain the film layer. The experiment shows that when the chemical composition and concentration of the electrolyte are constant, changing the voltage parameter of the one-step micro arc oxidation alone cannot prepare a thick, dense, and corrosion-resistant micro arc oxidation film layer, which cannot meet the practical application needs of rare earth magnesium alloys. Then, the one-step micro arc oxidation film layer is used as the substrate sample. By changing the voltage parameters, the sample is subjected to a second micro arc oxidation treatment to prepare a two-step micro arc oxidation film layer. In the study, it is found that the two-step microarc oxidation process increased the thickness of the film layer, which has good densification and corrosion resistance at a voltage of 452.5 V, improving the corrosion resistance of the film layer.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 2","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143363018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Growth and Inelastic Light Scattering Studies on Sr2Nb2O7 Single Crystal

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-09 DOI: 10.1002/crat.202400010

M. Suganya, P. Vijayakumar, V. Sivasubramanian, K. Ganesan, R.M. Sarguna, Amirdha Sher Gill, S. Ganesamoorthy

{"title":"Growth and Inelastic Light Scattering Studies on Sr2Nb2O7 Single Crystal","authors":"M. Suganya, P. Vijayakumar, V. Sivasubramanian, K. Ganesan, R.M. Sarguna, Amirdha Sher Gill, S. Ganesamoorthy","doi":"10.1002/crat.202400010","DOIUrl":"https://doi.org/10.1002/crat.202400010","url":null,"abstract":"A crack-free and high structural quality Sr2Nb2O7 single crystals are grown by the optical float zone method using optimized growth parameters. The Laue pattern confirms the single crystalline nature of the grown crystal. Temperature-dependent Raman and Brillouin light scattering studies reveal a significant shift in phonon modes across normal to incommensurate phase transition (Tn-in) which occurs ≈488 K. In the temperature range from 900 down to 500 K, two optical phonon modes ≈63 (B1 mode) and 54 cm−1 (A1 mode) are observed. The frequency of A1 mode strongly decreases with an increase in temperature above the Tn-in while the frequency of this mode almost remains constant below the Tn-in. In contrast, the frequency of B1 phonon mode is found to increase with temperature in the range of 500–900 K but it does not display a significant shift below the phase transition temperature. In addition, in the in-commensurate phase (T< 488 K), a new optical phonon mode (M1) at ≈35 cm−1 also begins to appear and exhibits strong stiffening behavior with an increase in temperature in the range of 300–488 K. Moreover, the anomalous behavior of the acoustic phonon across Tn-in are further probed using Brilliouin scattering. Longitudinal acoustic phonon mode at 41 GHz exhibits a strong change in slope near Tn-in. In addition, the transverse acoustic modes at 28.6 and 22.4 GHz also exhibit strong anomalies with minimum frequency near Tn-in. The inelastic light scattering studies provide valuable information on the phase transition.","PeriodicalId":48935,"journal":{"name":"Crystal Research and Technology","volume":"60 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143113347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Issue Information: Crystal Research and Technology 12'2024 发行信息：晶体研究与技术12'2024

IF 1.5 4区材料科学

Crystal Research and Technology Pub Date : 2024-12-08 DOI: 10.1002/crat.202470045

引用次数: 0