Article
Chemistry, Physical
Lianping Chen, Yuanhong Gao, Yibin Chen, Jun Cao
Summary: The influence of europium on the structure and luminescent properties of CaWO4 thin films was investigated, and the sputtering yields of different compounds were studied. The results showed that the compositions of the deposits matched those of the targets, and the lattice constants increased under certain conditions. The preferential growth along a specific crystal plane also increased due to the substitution of Ca2+ with Eu2+. Doping of Eu led to improved photoluminescence performance of the films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Se-Young Cho, Hyunsub Kim, Song-Ho Byeon
Summary: Layered yttrium hydroxide (LYH) was used to synthesize regular-shaped YVO4:Yb3+,Ho3+ particles in aqueous solution at room temperature. Annealing at higher temperatures dramatically enhanced the luminescence intensity of YVO4:Yb3+,Ho3+ particles. The prepared elliptical particles maintained high dispersibility and were utilized for the fabrication of transparent and flexible composite up-converter films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Tatyana B. Bekker, Alexey A. Ryadun, Alexey V. Davydov, Vladimir P. Solntsev, Veronika D. Grigorieva
Summary: Single crystals of undoped and rare-earth-doped Ba-12(BO3)(6)[BO3][LiF4] were grown from high-temperature solutions. The luminescence of these crystals at specific excitation wavelengths shows potential for converting LED emissions into white light.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Coatings & Films
Florian Lourens, Alfred Ludwig
Summary: This method presents a way to uniformly deposit thin films on microparticles by oscillating them, allowing for the coating of different types of particles and the deposition of films with composition gradients on uniform particles.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Tomas Vanek, Vitezslav Jary, Tomas Hubacek, Frantisek Hajek, Karla Kuldova, Zuzana Gedeonova, Vladimir Babin, Zdenek Remes, Maksym Buryi
Summary: A study observed and studied the significant acceleration of the yellow band defect luminescence (YB) in GaN layers with increasing Si and Ge doping concentration. The study explains the acceleration phenomenon of the photoluminescence (PL) decay time curve and the change in morphology with increasing doping concentration using experimental and theoretical models.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Sebastian M. J. Beer, Arbresha Muriqi, Patrick Lindner, Manuela Winter, Detlef Rogalla, Michael Nolan, Andreas Ney, Jorg Debus, Anjana Devi
Summary: Europium sulfide (EuS) thin films grown via chemical vapor deposition (CVD) exhibit high quality, stoichiometry, and tunability, with the advantage of avoiding the use of toxic hydrogen sulfide.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Muhammad Azhar, Ghazi Aman Nowsherwan, Muhammad Aamir Iqbal, Saira Ikram, Azqa Farrukh Butt, Mohsin Khan, Naushad Ahmad, Syed Sajjad Hussain, Muhammad Akram Raza, Jeong Ryeol Choi, Saira Riaz, Shahzad Naseem
Summary: This study investigates the potential use of cadmium sulfide (CdS) as a buffer layer in CdTe solar cells. The optical, photoluminescence, morphological, and electrical properties of CdS films doped with rare-earth metals were analyzed. Results show that the doping of samarium and lanthanum enhances conductivity and modifies the morphology of CdS. Optical and electrical measurements indicate changes in transmission and bandgap, suggesting the potential for improving the efficiency of photovoltaic devices. Photoluminescence spectra analysis reveals emission peaks in the visible region, attributed to electronic transitions. The findings indicate the viability of using doped CdS in photovoltaic systems.
Article
Chemistry, Physical
Yufei Zhang, Kaiyue Wang, Gangyuan Jia, Junlin Li, Hongxing Wang, Yuming Tian
Summary: The optical properties of a silicon-vacancy (Si-V) centre were studied using photoluminescence (PL) with temperature and excitation power dependencies. The intensity decrease, red shift, and broadening of line width with increasing temperature were observed, while the PL intensity of Si-V centre was sub-linear with increasing power. Additionally, the Fermi level shifted below the ground state level of Si-V in the irradiation region due to the introduction of neutral single vacancy (GR1) centre, suppressing the PL signal of the Si-V centre.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Yasser T. Alharbi, Firoz Alam, Khaled Parvez, Mohamed Missous, David J. Lewis
Summary: This paper outlines the synthesis of bournonite using a discrete molecular precursor strategy and characterizes the material through various techniques. The synthesized bournonite powders and thin films were found to exhibit an orthorhombic crystal structure and an optical band gap energy close to the theoretical value. The study provides insights into the potential of bournonite as a candidate material for photovoltaic energy conversion.
INORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Saad Ullah, Peixin Yang, YuQiao Li, Jiaming Wang, Linlin Liu, Rakeel Mahmood, Shi-E. Yang, Tianyu Xia, Haizhong Guo, Yongsheng Chen
Summary: In this study, a two-step vapor deposition approach was used to fabricate CsPbCl3 films, and the influence of different reaction conditions on the structural, morphological, and optical properties of the films was systematically examined. The optimal reaction conditions resulted in improved crystallinity, morphology, and photoluminescence, providing guidance for high-quality CsPbCl3 and other CsPbX3 perovskite films for future optoelectronic applications.
Article
Chemistry, Inorganic & Nuclear
Aida Raauf, Jennifer Leduc, Michael Frank, Daniel Stadler, David Graf, Michael Wilhelm, Matthias Grosch, Sanjay Mathur
Summary: In this study, UO2 thin films were synthesized by CVD using a U(VI) precursor, and it was found that the application of magnetic fields can alter the morphology and crystallographic orientation of grains, reduce grain size, promote polycrystalline growth, and decrease surface oxidation of U(IV) centers. The presence of a magnetic field as an extrinsic parameter in the CVD process has a positive effect on controlling the texture and chemical homogeneity of the grown films.
INORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Kristina Ashurbekova, Karina Ashurbekova, Iva Saric, Evgeny Modin, Mladen Petravic, Ilmutdin Abdulagatov, Aziz Abdulagatov, Mato Knez
Summary: This study presents a simultaneous growth and radical-initiated cross-linking of a hybrid thin film using molecular layer deposition (MLD) in a layer-by-layer manner. The cross-linked film demonstrates a self-limiting MLD growth behavior, as well as improved properties such as higher film density and enhanced stability compared to non-cross-linked films.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Physical
L. Khomenkova, H. Merabet, M. -P. Chauvat, C. Frilay, X. Portier, C. Labbe, P. Marie, J. Cardin, S. Boudin, J. -M. Rueff, F. Gourbilleau
Summary: The effect of Er precursor nature and annealing treatment on the properties of Er2O3 films grown on Si substrates was studied. Annealing resulted in film crystallization and the formation of Er silicate phase. The light emitting properties were determined by native defects and intra-4f shell transition. The intense Er3+ emission in the films grown with O2-plasma-assisted approach was attributed to a lower contribution of oxygen vacancies and pronounced crystallization of Er silicate phase.
SURFACES AND INTERFACES
(2022)
Article
Optics
Yu P. Gnatenko, P. M. Bukivskij, R. Gamernyk, A. P. Bukivskii, M. S. Furyer, M. M. Kolesnyk, D. Kurbatov, A. S. Opanasyuk
Summary: The influence of ytterbium doping on radiative recombination processes in CdTe thin films was investigated for the first time, revealing improved crystalline and optical quality as well as a potential change in conductivity type.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Inorganic & Nuclear
James D. Parish, Michael W. Snook, Andrew L. Johnson
Summary: A family of tin(ii) heteroleptic complexes and homoleptic systems were successfully synthesized and structurally characterized. NMR spectroscopy and single-crystal X-ray diffraction studies were used for comprehensive characterization. Thermal behavior of the complexes was investigated to determine their suitability as ALD precursors for SnO thin films deposition.
DALTON TRANSACTIONS
(2021)
Article
Physics, Applied
Yann Battie, Aotmane En Naciri, Michel Vergnat
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Optics
Georges Beainy, Jennifer Weimmerskirch-Aubatin, Mathieu Stoffel, Michel Vergnat, Herve Rinnert, Philippe Pareige, Etienne Talbot
JOURNAL OF LUMINESCENCE
(2017)
Article
Optics
E. Steveler, H. Rinnert, M. Vergnat
JOURNAL OF LUMINESCENCE
(2017)
Article
Chemistry, Physical
Georges Beainy, Jennifer Weimmersldrch-Aubatin, Mathieu Stoffel, Michel Vergnat, Herve Rinnert, Philippe Pareige, Etienne Talbot
JOURNAL OF PHYSICAL CHEMISTRY C
(2017)
Article
Physics, Applied
Paul Chevalier, Patrick Bouchon, Michael Verdun, Emilie Steveler, Nathalie Bardou, Christophe Dupuis, Fabrice Pardo, Riad Haidar
APPLIED PHYSICS LETTERS
(2018)
Article
Physics, Applied
A. A. Shklyaev, V. A. Volodin, M. Stoffel, H. Rinnert, M. Vergnat
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Optics
I. E. Tyschenko, V. A. Volodin, A. G. Cherkov, M. Stoffel, H. Rinnert, M. Vergnat, V. P. Popov
JOURNAL OF LUMINESCENCE
(2018)
Article
Physics, Condensed Matter
V. A. Volodin, Zhang Rui, G. K. Krivyakin, A. Kh. Antonenko, M. Stoffel, H. Rinnert, M. Vergnat
Article
Optics
S. G. Cherkova, V. A. Volodin, V. A. Skuratov, M. Stoffel, H. Rinnert, M. Vergnat
JOURNAL OF LUMINESCENCE
(2019)
Article
Physics, Applied
V. A. Volodin, G. N. Kamaev, V. A. Gritsenko, A. A. Gismatulin, A. Chin, M. Vergnat
APPLIED PHYSICS LETTERS
(2019)
Article
Computer Science, Information Systems
Vladimir A. Volodin, Pavel Geydt, Gennadiy N. Kamaev, Andrei A. Gismatulin, Grigory K. Krivyakin, Igor P. Prosvirin, Ivan A. Azarov, Zhang Fan, Michel Vergnat
Article
Chemistry, Organic
Chaima Mahmoudi, Ibrahim Bulut, Jiang Jing, Sadiara Fall, Benoit Heinrich, Stephane Mery, Thomas Heiser, Patrick Leveque, Emilie Steveler, Mustapha Majdoub, Nicolas Leclerc
Summary: Two new dumbbell-shaped molecules based on solubilizing and structuring triazatruxene units connected by a central chromophore were synthesized. These molecules exhibited different electronic conjugation pathways, leading to different absorption properties and energy levels, with one showing higher Power Conversion Efficiency (PCE) attributed to internal charge transfer bands.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Fan Zhang, V. A. Volodin, E. A. Baranov, V. O. Konstantinov, V. G. Shchukin, A. O. Zamchiy, M. Vergnat
Summary: Electron beam annealing was used to form amorphous and crystalline germanium clusters in specific films for the first time. Different methods were found to create sufficient amounts of crystalline germanium in GeO[SiO] and GeO[SiO2] films.
Article
Computer Science, Information Systems
Ivan D. Yushkov, Liping Yin, Gennadiy N. Kamaev, Igor P. Prosvirin, Pavel V. Geydt, Michel Vergnat, Vladimir A. Volodin
Summary: Nonstoichiometric GeSixOy glass films and many-layer structures were obtained by high-vacuum electron beam vapor deposition. The deposited samples were studied using various techniques and the resistive switching behavior was observed in the fabricated memristor metal-insulator-semiconductor (MIS) structures. Intermediate resistance states were observed in many-layer structures, which could have potential applications in multi-bit memristors and neural network simulations.
Article
Chemistry, Physical
Cheick Oumar Diarra, Mauro Boero, Emilie Steveler, Thomas Heiser, Evelyne Martin
Summary: P3HT is a polymer used in organic solar cells as a light absorber and an electron donor. The efficiency of the solar cell depends on the diffusion of photogenerated excitons, which can be measured using time-resolved photoluminescence. This study used first-principles molecular dynamics and the restricted open-shell approach to model the singlet excited state of P3HT and found that the resulting diffusion coefficient agrees with experimental measurements.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)