Article
Chemistry, Physical
Cheolho Kim, Jiwon Sul, Jun Hyuk Moon
Summary: This study developed a semiconductor process for fabricating multi-scale porous carbon thin films by carbonization of oxide-coated multi-beam interference lithography photoresist patterns. The resulting hierarchically porous carbon thin film exhibited a high BET surface area and porosity. These porous carbon thin films were used as electrodes for microsupercapacitors and lithium-oxygen batteries, demonstrating high energy density, power density, discharge capacity, and reversible charge/discharge characteristics.
ENERGY STORAGE MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Zhongkai Cheng, Deirdre M. O'Carroll
Summary: Photon recycling is crucial in the study of semiconductor materials, impacting their optoelectronic applications; however, further in-depth theoretical and experimental studies are needed to demonstrate its advantages and importance rigorously.
Article
Chemistry, Physical
Nobutaka Shioya, Ryoi Fujiwara, Kazutaka Tomita, Takafumi Shimoaka, Koji K. Okudaira, Hiroyuki Yoshida, Tomoyuki Koganezawa, Takeshi Hasegawa
Summary: Solution-processable organic semiconductors with bulky substituent groups are promising for large-area electronics, but the substituent groups can affect charge-carrier transport in thin films. Using a solvent-soluble precursor compound with thermally cleavable functional groups can generate the desired material consisting solely of conjugated systems, but the overall process of thin film growth remains unrevealed.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Review
Chemistry, Multidisciplinary
Sucheta Sengupta, Rinki Aggarwal, Yuval Golan
Summary: Among the chemical deposition methods, chemical deposition from aqueous solution (CD) is the oldest and most studied process. It requires an intricate balance of growth parameters to produce high-quality thin films. The presence of complexing agents helps to control the morphology of the thin films.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Engineering, Electrical & Electronic
Li Zhang, Yanqiu Liu, Renhuai Wei, Xiaotian Kong, Ping Li, Jiangying Yu, Kai Huang, Xuebin Zhu
Summary: In this study, epitaxial La0.7Sr0.3MnO3 thin films were successfully prepared by using an ultraviolet laser-assisted annealing technique. The films exhibited a specific epitaxial relationship and showed enhanced properties with increasing laser energy density.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Yuki Ohigashi, Amon Higuchi, Nataly Carolina Rosero-Navarro, Akira Miura, Kiyoharu Tadanaga
Summary: Thin films of Cu3N were successfully obtained by nitridation of CuO precursor films using urea as a nitrogen source. The formation of Cu3N was confirmed at 400 degrees C for 12 hours under nitrogen flow, with FT-IR spectra indicating the reaction between CuO and urea decomposition products.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Fangjuan Geng, Yu-Ning Wu, Daniel Splith, Liangjun Wang, Xiaowan Kang, Xiaojian Chen, Pengsheng Guo, Shanshan Liang, Lei Yang, Michael Lorenz, Marius Grundmann, Jiaqi Zhu, Chang Yang
Summary: By developing an amorphous Cu(S,I) material system, record high hole conductivities of 10(3)-10(4) S cm(-1) have been achieved in p-type amorphous transparent conductors (a-TCs), making them comparable with commercial n-type TCs made of indium tin oxide and 100 times greater than any previously reported p-type a-TCs. The high hole conduction is due to the overlap of large p-orbitals of I- and S2- anions, providing a hole transport pathway insensitive to structural disorder. Additionally, the bandgap of amorphous Cu(S,I) can be modulated from 2.6 to 2.9 eV by increasing the iodine content. These unique properties demonstrate the great potential of the Cu(S,I) system as a promising p-type amorphous transparent electrode material for optoelectronics.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Younghwan Lee, Hyun Woo Jeong, Se Hyun Kim, Kun Yang, Min Hyuk Park
Summary: This article discusses the effects of stress/strain on FF thin films, including the mechanisms, material properties, and device performances. Research in this field is crucial for understanding and optimizing FF thin films and related devices.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Chemistry, Physical
Swapnil D. Deshmukh, Caleb K. Miskin, Apurva A. Pradhan, Kim Kisslinger, Rakesh Agrawal
Summary: In this work, solution-processed Se-Te alloy thin films were successfully fabricated using an amine-thiol solvent system. By controlling the Se/Te ratios, films with different compositions were obtained, showing variation in band gaps. The addition of foreign solvents improved the film quality, and preliminary devices showed promising photovoltaic performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Sangeun Jung, Luke Huelsenbeck, Qikun Hu, Sean Robinson, Gaurav Giri
Summary: The insulating nature of most MOFs can be altered by incorporating a small-molecule organic semiconductor, TCNQ, into the pores of HKUST-1. However, current processes face limitations such as slow crystallization rates and the formation of undesired byproducts. By utilizing the solution shearing technique, HKUST-1 films can be rapidly synthesized over large areas with consistent thickness and no pinholes, leading to a significantly increased electrical conductivity when incorporating TCNQ. The solution-sheared TCNQ@HKUST-1 thin films exhibit a conductivity over 7 orders of magnitude higher than films formed by high-pressure pelletization of TCNQ@HKUST-1, showing potential for large-area electronics applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Engineering, Environmental
Jigui Shi, Xuelian Wu, Xingjin Geng, Lipeng Hu, Fusheng Liu, Weiqin Ao, Chaohua Zhang
Summary: Flexible thermoelectric technology has the potential to convert human body heat into electricity for wearable devices. However, achieving both high flexibility and performance remains a challenge. In this study, an anisotropy engineering strategy using nanostructuring and excess Te addition was proposed to overcome this challenge. Patchwork-like Bi(2)Te(2.7)Se(0.)3 nanorods were prepared using a two-step solution-synthesis method and assembled into flexible thin films. By optimizing the anisotropy and interfacial properties, a high power factor and power density were achieved in the TE devices. This research demonstrates the potential of anisotropy engineering in advancing flexible thermoelectric devices.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Bar Koren, Ofir Friedman, Nitzan Maman, Shmuel Hayun, Vladimir Ezersky, Yuval Golan
Summary: Thin films of CuSe were deposited on GaAs substrate. XRD analysis showed a Klockmannite phase, while electron diffraction in the TEM surprisingly indicated a beta-Cu2-xSe phase, possibly due to selenium loss during specimen preparation causing phase transition. Control of film phase can be achieved by adjusting reactant composition.
Article
Physics, Applied
Samanth Kokkiligadda, Mallikarjuna Reddy Kesama, Sohee Jeon, Jun-Ho Jeong, Sung Ha Park
Summary: In this study, we fabricated two different types of electrodes on flexible drug- and dye-embedded DNA thin films to test their electrical and capacitance properties. By manipulating functional nanomaterials and various types of metal layer electrodes, we can control the physical properties of our samples. Our self-supporting DNA thin films with integrated nanomaterials and durable metal layer electrodes might be employed in future flexible electronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Prithu Bhatnagar, Daryoosh Vashaee
Summary: This study investigates the formation of highly doped poly-Si thin films using spin-on dopants and evaluates different approaches for dopant diffusion, residue removal, and diffusion mask selection. The findings suggest that residue formation depends on the oxide-silicon surface, and a PECVD oxide-Si interface does not require post-dopant diffusion nitric acid treatment for achieving a hydrophobic surface. Comparing direct dispense and proximity diffusion methods confirms enhanced diffusion in the latter case. Additionally, doping first with Boron is found to be more effective than doping first with phosphorus in reducing sheet resistance.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Rachel C. Barbieri, Kai Ding, Umit Ozgur, Indika U. Arachchige
Summary: Ge1-xSnx nanocrystals are direct-gap semiconductors with tunable size and composition, showing enhanced optical properties and conductivity compared to pure Ge nanocrystals. By replacing insulating ligands with molecular metal chalcogenides, solution-processed conductive thin films can be produced, leading to significantly increased electrical conductivity. The alloying of Ge and Sn results in blue-shifted energy gaps and increased conductivity, making these nanocrystals promising for various optoelectronic applications.
CHEMISTRY OF MATERIALS
(2021)
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)