Article
Nanoscience & Nanotechnology
Jakapan Chantana, Yu Kawano, Takahito Nishimura, Abdurashid Mavlonov, Takashi Minemoto
Summary: This study investigates the structure and sample position effects on the performance of flexible, Cd-free, and all-dry process Cu(In,Ga)(S,Se)₂ (CIGSSe) solar cells on stainless steel substrates. The results show that the sample position plays a vital role in improving the cell performance, with a deviation from material targets leading to enhanced photovoltaic efficiency.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Khalid Bashir, Nasir Mehboob, Muhammad Ashraf, Abid Zaman, Fozia Sultana, Abdul Faheem Khan, Asad Ali, Muhammad Mushtaq, Sarir Uddin, Khaled Althubeiti
Summary: Increase in Mg content led to higher transmittance, blue shift of absorption edge, and increased optical band gap in CdMgO films. Refractive index decreased, while electrical resistivity increased with higher Mg content.
Article
Chemistry, Multidisciplinary
Vadim Morari, Veaceslav V. Ursaki, Emil Rusu, Victor V. Zalamai, Pascal Colpo, Ion M. Tiginyanu
Summary: This study explored the morphology, composition, nano-crystalline structure, and optical and vibration properties of Zn1-xMgxO thin films. A device design based on these films as heterostructure photodetectors was proposed and demonstrated in the injection photodiode mode.
Article
Materials Science, Ceramics
Yu-Sen Jiang, Kuei-Wen Huang, Sheng-Han Yi, Chin- Wang, Teng-Jan Chang, Wei-Chung Kao, Chun-Yuan Wang, Yu-Tung Yin, Jay Shieh, Miin-Jang Chen
Summary: The ferroelectric properties of nanoscale ZrO2 thin films can be enhanced by adding an HfO2 seed layer in metal-ferroelectric-semiconductor structures. The ZrO2/HfO2 bilayer structure demonstrates improved crystallization and polarization effects, which make it suitable for ferroelectric memory devices fabricated on Si substrates.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Anoop Kumar Singh, Shiau-Yuan Huang, Po-Wei Chen, Jung-Lung Chiang, Dong-Sing Wuu
Summary: The study investigated the effect of thermal annealing in different ambients on the microstructural and optoelectronic properties of ZnGa2O4 films, finding that ZnGa2O4 films annealed under air ambiance exhibited excellent optoelectronic performance and quasi-single-crystalline structure, suitable for metal-semiconductor-metal photodetectors.
Article
Chemistry, Physical
Anoop Kumar Singh, Po-Wei Chen, Dong-Sing Wuu
Summary: Al-doped ZnGa2O4 films were deposited on sapphire substrates with varying DC power for the Al target, with the 20 W deposition showing the highest crystalline quality and wide-bandgap. X-ray photoemission spectra revealed the bonding of Al in the ZGO network, and the photodetector with the 20 W film exhibited significantly improved performance compared to the 0 W film.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Applied
Yeriaron Kim, Seung Youl Kang, Jiyong Woo, Jeong Hun Kim, Jong-Pil Im, Sung-Min Yoon, Seung Eon Moon
Summary: In this study, Metal-ferroelectric-insulator-semiconductor (MFIS) capacitors were characterized to explore the optimal design schemes for ferroelectric field-effect transistor applications. The findings suggest that the choice of specific film thickness and control of crystalline nature can greatly enhance the performance of the MFIS capacitors, leading to improvements in capacitance coupling ratio, charge injection suppression, and memory retention.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Jian Song, Mingyu Gong, Meng-fu Tsai, Youcao Ma, Houyu Ma, Yue Liu, Ying-hao Chu, Rong Huang, Jun Ouyang, Jian Wang, Tongxiang Fan
Summary: By using atomistic simulation and microscopy characterization, a pseudo-ferroelectric domain with similar morphology to a ferroelectric domain but with the same defect character as a ferroelastic domain-wall, i.e., a semi-coherent (100)(matrix)||(100)(domain) interface, is identified. Pseudo-ferroelectric domain walls play a critical role in the migration kinetics of ferroelastic domains and the piezoelectric responses of ferroelectric thin films during cyclic mechanical/electrical loading.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Abdelaziz Tchenka, Abdelali Agdad, Abderrahman Mellalou, Mounir Chaik, Driss Ait el Haj, Abdelfattah Narjis, Lahcen Nkhaili, ELalami Ibnouelghazi, Elmaati Ech-Chamikh
Summary: This study successfully synthesized indium tin oxide (ITO) thin films using the radio frequency (RF)-sputtering method on glass substrates at room temperature. The structural, optical, electrical, and thermoelectric properties of the prepared films were investigated. The results showed that the films had suitable structure and properties for various applications.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Vikas A. Patel, Basumati H. Patel
Summary: Zn1-xMgxO thin films were successfully deposited by pulse laser deposition technique, and the influence of substrate temperature on the properties of the films was investigated. It was found that the crystallinity of the films improved significantly with increasing substrate temperature, and the energy band gap value of the films was engineered systematically by changing the substrate temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Applied
Nikita Sharma, Lalit Pandey, Nakul Kumar, Nanhe Kumar Gupta, Soumyarup Hait, Vireshwar Mishra, Amar Kumar, Sujeet Chaudhary
Summary: This study presents a detailed investigation of the structural, electrical, and magnetic properties of Co2MnGa thin films. The experimental results show that these films have polycrystalline nature with B2 type structural ordering, magnetic isotropy, and soft ferromagnetic behavior. A remarkably high anomalous Hall conductivity, with nearly 73% intrinsic contribution, is found in the 40 nm thick film. This research provides important insights into the magnetic and transport properties of Co2MnGa thin films of different thicknesses and suggests their promising potential for topospintronic applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Environmental
Ruikai Wang, Haiyan Li, Zhichao Hao, Ting Feng, Yanxin Li, Bohua Dong, Lixin Cao
Summary: The recombination of photogenerated carriers and sluggish surface oxidation kinetics were effectively inhibited in the Zn1-xMgxO-modified CuWO4 photoanode, resulting in enhanced photoelectrochemical water oxidation. The heterojunction transformation between Zn1-xMgxO and CuWO4 and the local surface plasmon resonance (LSPR) of plasma metal (Ag) facilitated the extraction of carriers and promoted the water oxidation reaction. Moreover, the surface states trapped/stored holes and reduced charge transfer resistance, leading to improved charge transfer. The optimized CuWO4/Zn0.7Mg0.3O/Ag photoanode demonstrated significant advancements in photocurrent density, electrochemical impedance, and stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Anna Demchenko, Suvidyakumar Homkar, Corinne Bouillet, Christophe Lefevre, Francois Roulland, Daniele Preziosi, Gilles Versini, Cedric Leuvrey, Philippe Boullay, Xavier Devaux, Nathalie Viart
Summary: Understanding the polarization switching mechanisms in ferroelectric materials is crucial for their use in electronic devices. A study was conducted on thin films of the Ga0.6Fe1.4O3 multiferroic compound, revealing an unconventional switching mechanism via local domain wall motion in this material.
Article
Engineering, Chemical
Waqas Ahmad, Waqas Farooq, Adnan Daud Khan, Shayan Tariq Jan, Michal Jasinski, Zbigniew Leonowicz, Radomir Gono, Jan Petrov
Summary: This study investigates the influence of C2N-based solar cells with Zn1-xMgxO buffer layers using numerical simulations. The results show that increasing the buffer layer Mg concentration reduces device performance, while increasing the absorber layer thickness improves efficiency. However, a doping density above a certain level degrades cell performance. Optimizing the buffer layer thickness and doping density, the C2N/Zn0.8125Mg0.1875O structure achieves the highest power conversion efficiency (PCE) of 19.01%.
Article
Materials Science, Multidisciplinary
K. B. Joel-Igor N'Djore, M. Grafoute, A. Bulou, C. Rousselot
Summary: Tungsten oxide thin films were grown on different substrates using direct current magnetron sputtering. By varying the oxygen flow rate, a series of amorphous WOx films with different stoichiometry and porosity were obtained. The study aimed to determine the optimal electrochromic performances of WOx by studying the correlation between physical properties and electrochromic performances. The films' optical transmittance increased from opaque to transparent with an increase in oxygen flow rate. The films' refractive index decreased and porosity increased with an increase in total pressure induced by oxygen flow rate.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
