Article
Engineering, Electrical & Electronic
Bidyut Barman, Sanjay Kumar Swami, Viresh Dutta
Summary: Sputter deposition of multilayer ZAZ and AAA TCO coatings was achieved using a magnetron sputtering system, showing improved electrical properties compared to commercial ITO film. High-temperature annealing demonstrated stable optical and electrical properties of the fabricated TCO layers up to 200℃.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
Chukwudi E. Iheomamere, Corey L. Arnold, Jason Summers, Richard F. Reidy, Andrey A. Voevodin, Nigel D. Shepherd
Summary: RF magnetron sputtering of h-BN onto unheated substrates produced a-BOxNy films, with surface roughness improving and pinholes eliminated as deposition pressure increased. The a-BOxNy/ZnO interface transition from accumulation to inversion required about 2 V.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Coatings & Films
Tomasz Wojcik, Vincent Ott, Sedat Oezbilen, Harald Leiste, Sven Ulrich, Paul Heinz Mayrhofer, Helmut Riedl, Michael Stueber
Summary: Transition metal diboride-based thin films have attracted strong interest in both fundamental and applied research. This study investigated the constitution and microstructure of multilayer thin films composed of TiBx and NiAl, and found that the nature of the interfaces has an impact on dislocation density and the ability to form dislocations in these multilayer structures.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Chemistry, Physical
Zeping Li, Xiong Yu, Yunhao Zhu, Sisi Liu, Xiaoyan Wen, Haifei Lu, Cong Wang, Xiao Li, Ming-Yu Li, Yingping Yang
Summary: In this study, ZnO quantum dot (QD) / magnetron sputtered ZnO homojunction photodetectors with excellent performance were fabricated by systematically varying the thickness ratios between two ZnO layers. The balanced ratio resulted in extra adsorption-desorption sites from the ZnO QDs and accelerated carrier transportation from the highly crystallized magnetron sputtered ZnO layers. As a result, the fabricated ZnO homojunction photodetector showed significantly increased responsivity and external quantum efficiency, paving the way for ultra-sensitive UV photodetection.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Zhaoxin Wang, Shunbo Wang, Jiru Wang, Yihan Niu, Xiangyu Zong, Cong Li, Shaodong Jiang, Hongwei Zhao
Summary: The influence of structural properties and layer structure on the mechanical properties of ITO/Ag/ITO multilayer thin films was systematically investigated in comparison with single-layer ITO thin film. The results showed that multilayer composite films can improve surface morphology, reduce residual stress, and enhance wear resistance, indicating the potential for tailored mechanical properties.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Subhashis Samanta, Brijmohan Paramanik, Debajyoti Das
Summary: This manuscript presents a study on the structural characteristics, impedance spectroscopy, ac-conductivity, and dielectric loss of F-doped ZnO films grown by RF-magnetron sputtering at different temperatures. The results show that the electrical impedance spectroscopy can distinguish the contributions of grain and grain-boundary on the electronic properties. The ac-conductivity follows Jonscher power law, indicating hopping of charge carriers under ac electric field. The temperature-dependent dc-conductivity exhibits Arrhenius behavior. The dielectric loss is influenced by the doping level, with the low temperature grown samples showing higher conduction loss.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Giji Skaria, Avra Kundu, Kalpathy B. Sundaram
Summary: Copper indium oxide (CuInOx) thin films were deposited using RF magnetron sputtering technique at various substrate temperatures up to 400 degrees C, achieving a p-type thin film with increased conductivity and high transparency. XPS studies confirmed the controlled migration of indium oxide phases during sputtering, leading to superior conductivity and transparency with increasing substrate temperatures. The fabricated p-CuInOx/n-Si heterojunction had a knee voltage of 0.85 V, and initial solar cell parameters were reported after investigating the photovoltaic behavior of the device.
Article
Materials Science, Multidisciplinary
Shihui Yu, Baomin Tang, Chao Wu, Lingxia Li
Summary: This work presents the fabrication of an ultraflexible transparent conductive hybrid film by embedding silver nanowires into a thin UV-curable resin film. The hybrid film exhibits excellent electrical conductivity and transparency, even after undergoing bending and ultrasonication. It also demonstrates environmental endurance, maintaining its performance under high temperature and humidity conditions. The successful implementation of the hybrid film as a transparent film heater is demonstrated, showing efficient Joule heating.
Article
Engineering, Electrical & Electronic
Chunhu Zhao, Junfeng Liu, Yixin Guo, Yanlin Pan, Xiaobo Hu, Guoen Weng, Jiahua Tao, Jinchun Jiang, Shaoqiang Chen, Pingxiong Yang, Junhao Chu
Summary: The study optimized aluminum doped ZnO thin films using RF magnetron sputtering, achieving high-quality optical and electrical properties. The optimized films demonstrated excellent optical and electrical characteristics at low resistivity, making them suitable as front contact layers in solar cell applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Haihong Niu, Cunlong Fang, Xiantao Wei, Huan Wang, Lei Wan, Yuan Li, Xiaoli Mao, Jinzhang Xu, Ru Zhou
Summary: This work utilized magnetron sputtering to deposit ZnO ETL for PSCs with improved device performance and efficiency, achieving a PCE of 13.04%. A bilayer ZnO/SnO2 ETL was designed to enhance electron extraction efficiency, resulting in an increased PCE of 15.82% with reduced hysteresis.
DALTON TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Ashwin Kumar Saikumar, Sreeram Sundaresh, Shraddha Dhanraj Nehate, Kalpathy B. Sundaram
Summary: In this study, thin films of CuGa2O4 were deposited for the first time using RF magnetron-sputtering technique and post-deposition annealed at varying temperatures. Structural and morphological studies revealed an increase in grain size and decrease in optical transmission with increasing annealing temperature. The optical bandgap value also showed an increasing trend with annealing temperature.
Article
Materials Science, Coatings & Films
Ngetich Gilbert Kipkirui, Tzu-Tang Lin, Rotich Sammy Kiplangat, Jyh-Wei Lee, Shih-Hsun Chen
Summary: High entropy alloy (HEA) thin-film coatings have excellent physical, mechanical, and electrochemical properties, making them popular in surface engineering applications. The deposition process, particularly the energy of the impacting species, plays a crucial role in the density and microstructure of the coatings. RF magnetron sputtering and HiPIMS techniques were used in this study to deposit Al0.5CoCrFeNi2Ti0.5 HEA thin-film coatings, resulting in improved surface morphology and corrosion resistance. The study demonstrates that these techniques offer better control over the properties of the thin-film coatings, enhancing their potential use in extreme environments.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
A. A. Serdobintsev, V. V. Galushka, L. D. Volkovoynova, I. O. Kozhevnikov, E. S. Prikhozhdenko, D. I. Artyukhov, N. V. Gorshkov, A. M. Pavlov, A. V. Starodubov
Summary: This study reports on the effects of aluminum and silicon segregation in mu m-thick magnetron co-deposited Si-Al films. It was found that an increase in aluminum content leads to the segregation of a separate crystalline phase, accompanied by the emergence of the c-Si phase. Silicon crystallization process is controlled by the redistribution of components in the film, which can be attributed to aluminum-induced crystallization process. The redistribution of aluminum and silicon phases in the amorphous matrix can be utilized to customize the electrophysical properties of the resulting coatings for applications in mm-band RF devices.
Article
Chemistry, Physical
Malkeshkumar Patel, Ji Heun Seo, Sangho Kim, Thanh Tai Nguyen, Manjeet Kumar, Juhyung Yun, Joondong Kim
Summary: This study introduces a photovoltaic-powered transparent heater system using silver nanowire networks to generate heat via the Joule effect. The ZnO coating not only enhances stability but also maintains the optical transparency of the heater.
JOURNAL OF POWER SOURCES
(2021)
Article
Materials Science, Multidisciplinary
Madjeda Mohamedi, Fatiha Challali, Tahar Touam, Maria Konstantakopoulou, Valerie Bockelee, Djelloul Mendil, Salim Ouhenia, Djamel Djouadi, Azeddine Chelouche
Summary: AZO/Ag/AZO multilayer structures were grown on glass and quartz substrates with varying Ag layer thicknesses. The microstructural, morphological, and optoelectronic properties of the structures were analyzed. The results showed that the crystallinity, crystallite size, and surface roughness were influenced by the Ag layer thickness and substrate type. The optical measurements revealed that the transmission properties of the multilayer structures depended on the Ag thickness, while the optical bandgap increased with Ag thickness. The electrical properties of the structures improved with increasing Ag thickness, and the glass substrate demonstrated better performance with a figure of merit of 1.34 x 10(-3) & omega;(-1) achieved at 10 nm Ag thickness.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Nanoscience & Nanotechnology
Donovan Thomas, Harold O. Lee, Kevin C. Santiago, Marvin Pelzer, Ayodeji Kuti, Erin Jenrette, Messaoud Bahoura
JOURNAL OF NANOMATERIALS
(2020)
Article
Multidisciplinary Sciences
Makhes K. Behera, Leslie C. Williams, Sangram K. Pradhan, Messaoud Bahoura
SCIENTIFIC REPORTS
(2020)
Article
Multidisciplinary Sciences
Gilbert Kogo, Bo Xiao, Samuel Danquah, Harold Lee, Julien Niyogushima, Kelsea Yarbrough, Aaditya Candadai, Amy Marconnet, Sangram K. Pradhan, Messaoud Bahoura
SCIENTIFIC REPORTS
(2020)
Article
Materials Science, Multidisciplinary
Jacob Strimaitis, Taliya Gunawansa, Sangram Pradhan, Messaoud Bahoura
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2020)
Article
Multidisciplinary Sciences
Bo Xiao, Gugu N. Rutherford, Amrit P. Sharma, Sangram K. Pradhan, Carl E. Bonner, Messaoud J. Bahoura
SCIENTIFIC REPORTS
(2020)
Article
Nanoscience & Nanotechnology
Makhes K. Behera, Leslie C. Williams, Sangram K. Pradhan, Messaoud Bahoura
Article
Multidisciplinary Sciences
Amrit P. Sharma, Makhes K. Behera, Dhiren K. Pradhan, Sangram K. Pradhan, Carl E. Bonner, Messaoud Bahoura
Summary: Heterostructures prepared with ferroelectric materials can convert waste heat into electrical energy with high pyroelectric properties and energy conversion density. By measuring temperature-dependent ferroelectric hysteresis loops, our research suggests that these structures may be potential candidates to harvest electrical energy from low-grade waste heat.
SCIENTIFIC REPORTS
(2021)
Article
Nanoscience & Nanotechnology
Jasmine Beckford, Makhes K. Behera, Kelsea Yarbrough, Brandon Obasogie, Sangram K. Pradhan, Messaoud Bahoura
Summary: GZO thin films with high transmittance and electrical conductivity are suitable for thin-film transparent heaters. They exhibit over 85% transmittance in the visible range and low resistivity. Joule heating effect can raise the temperature to over 120 degrees Celsius with an applied voltage of around 12V.
Article
Chemistry, Inorganic & Nuclear
Donovan Thomas, Harold O. Lee, Kevin C. Santiago, Marvin Pelzer, Ayodeji Kuti, LaRico J. Treadwell, Messaoud Bahoura
Summary: In this study, europium-doped CdSe quantum dots were successfully synthesized using a one-pot microwave synthesis method. By varying microwave irradiation temperatures, hold times, and dopant concentration, the optical properties of CdSe quantum dots were tuned. UV-Vis spectroscopy and photoluminescence data show that structural incorporation of europium affects the optical properties of CdSe QDs.
DALTON TRANSACTIONS
(2021)
Article
Physics, Applied
Mamadou T. Mbaye, Sangram K. Pradhan, Messaoud Bahoura
Summary: Recent advancements in computing technologies, coupled with the need to make sense of large amounts of data, have reignited interest in data-driven materials design and discovery. By applying machine learning and other data-driven modeling tools, researchers can accelerate the process of material discovery and analyze material features to accurately predict outputs. Through evaluation of model accuracy and performance metrics, important material descriptors can be identified for future materials research.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Kelsea A. Yarbrough, Makhes K. Behera, Jasmine Beckford, Sangram K. Pradhan, Messaoud Bahoura
Summary: A study was conducted on various high kappa dielectrics, including HfO2, ZrO2, and Al2O3 thin films, as potential replacements for traditional SiO2. These films were grown using atomic layer deposition at two different temperatures (150 and 250°C) on p-type silicon substrates, resulting in large smooth surfaces. Metal oxide semiconductor capacitor (MOSCAP) structures were fabricated by depositing a top metal electrode on the high kappa layer. The study also examined the electrical characteristics of a metal oxide semiconductor field-effect transistor device with Al-doped ZnO as the channel material.
Article
Nanoscience & Nanotechnology
Jasmine Beckford, Makhes K. Behera, Kelsea Yarbrough, Sangram K. Pradhan, Messaoud Bahoura
Summary: This work presents the deposition and characterization of thin-film transparent heaters (TFTHs) made of gallium-doped zinc oxide (GZO). GZO thin films were deposited on glass substrates using pulsed laser deposition technique with varying oxygen partial pressures. The results showed that the GZO-based TFTHs exhibited low electrical resistance, high optical transparency, and consistent joule heating effects at a low input voltage of 10V, reaching temperatures up to 76?. This research provides insights for the future use of GZO as a transparent conducting oxide material in various cost-effective applications.
Article
Electrochemistry
Samuel Adjepong Danquah, Jacob Strimaitis, Clifford F. Denize, Sangram K. Pradhan, Messaoud Bahoura
Summary: Garnet solid-state electrolyte has shown potential in improving ion conductivity, but suffers from interface resistance. By preparing a composite material, the interfacial resistance can be reduced, enhancing ion conduction and achieving outstanding electrochemical stability.
Article
Materials Science, Multidisciplinary
Thomas Debesay, Sam-Shajing Sun, Messaoud Bahoura
Summary: The study investigates the impact of dual doping on the electrical properties of regio-regular poly(3-hexylthiophene-2,5-diyl) (P3HT) and how it enhances the output performance of organic field effect transistors (OFETs). The findings show that doping improves surface morphology, increases light absorbance spectrum, and enhances electrical conductivity, which can be instrumental in advancing future organic semiconductors research.
AIMS MATERIALS SCIENCE
(2021)
Proceedings Paper
Engineering, Manufacturing
Chintan P. Chavda, Ashok Srivastava, Sangram K. Pradhan, Messaoud Bahoura
NANO-, BIO-, INFO-TECH SENSORS, AND 3D SYSTEMS IV
(2020)
