Article
Chemistry, Multidisciplinary
Bin Sun, Amin Morteza Najarian, Laxmi Kishore Sagar, Margherita Biondi, Min-Jae Choi, Xiyan Li, Larissa Levina, Se-Woong Baek, Chao Zheng, Seungjin Lee, Ahmad R. Kirmani, Randy Sabatini, Jehad Abed, Mengxia Liu, Maral Vafaie, Peicheng Li, Lee J. Richter, Oleksandr Voznyy, Mahshid Chekini, Zheng-Hong Lu, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: Colloidal quantum dots (CQDs) have tunable bandgap and solution processing, making them promising materials for infrared (IR) light detection. However, the time response of CQD IR photodiodes is currently inferior to that of Si and InGaAs. The high permittivity of II-VI CQDs leads to slow charge extraction, while III-Vs offer low permittivity and potential for high-speed operation. By managing the surface using amphoteric ligand coordination, the performance of InAs CQD solids is improved, achieving fast response time and high external quantum efficiency.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Sheikh Z. Ahmed, Yaohua Tan, Jiyuan Zheng, Joe C. Campbell, Avik W. Ghosh
Summary: This paper investigates the origin of small band gaps in III-V digital alloy avalanche photodiodes and provides a method for controlling the size of the valence band mini-gap to achieve high-gain avalanche photodiodes.
Article
Chemistry, Physical
Maciej J. Winiarski
Summary: This study investigated the electronic structures of ternary alloys of group III and rare earth nitrides, revealing that the introduction of rare earth ions can affect the band gap width. The findings suggest potential applications of these materials, encouraging further experimental investigations.
Article
Energy & Fuels
S. Catalan-Gomez, E. Martinez Castellano, M. Schwarz, M. Montes Bajo, L. Dorado Vargas, A. Gonzalo, A. Redondo-Cubero, A. Gallego Carro, A. Hierro, J. M. Ulloa
Summary: This study investigates the use of core-shell gallium nanoparticles as functional light scatterers on solar cells. By optimizing the nanoparticle size, the short-circuit current of the solar cells is significantly improved. The underlying physical mechanism is studied through optical measurements and simulations, and a method to reduce the plasmonic effect of the nanoparticles is demonstrated.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2024)
Article
Physics, Applied
Mithun Bhowmick, Haowen Xi, Bruno Ullrich
Summary: This article introduces a model that accurately fits the absorption saturation parameter linked to the effective electron density of states, allowing for the comparison of experimentally found absorption limits and their variations in compound semiconductors with theoretical expectations. This is crucial for certain optoelectronic device applications.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Fan Cui, Yunyan Zhang, H. Aruni Fonseka, Premrudee Promdet, Ali Imran Channa, Mingqing Wang, Xueming Xia, Sanjayan Sathasivam, Hezhuang Liu, Ivan P. Parkin, Hui Yang, Ting Li, Kwang-Leong Choy, Jiang Wu, Christopher Blackman, Ana M. Sanchez, Huiyun Liu
Summary: The use of a thin layer of TiO2 deposited by atomic layer deposition can provide robust protection to III-V semiconductor nanowires, enhancing both their stability and performance in water-splitting applications. The protected nanowires showed improved photoluminescence intensity retention, higher photocurrent density, and a record-long highly stable performance compared to unprotected counterparts, demonstrating the effectiveness of the TiO2 layer as a protective coating.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Energy & Fuels
Jiaying Chen, Youtian Mo, Chaoying Guo, Jiansen Guo, Bingshe Xu, Xi Deng, Quan Xue, Guoqiang Li
Summary: The combination of III-V compound semiconductor materials and organic semiconductor materials is a potential pathway to solve the problems of conventional doped p-n junction solar cells. This review presents the recent progress of organic-inorganic hybrid solar cells based on polymers and III-V semiconductors, including materials, devices, growth processes, patterning and etching processes, advanced device structure designs, and optimization pathways for efficiency enhancement. The future development of such hybrid cells is also discussed.
Article
Optics
Xian Xiao, Mehmet Berkay On, Thomas Van Vaerenbergh, Di Liang, Raymond G. Beausoleil, S. J. Ben Yoo
Summary: This paper introduces a large-scale, energy-efficient, high-throughput, and compact tensorized optical neural network (TONN) using tensor-train decomposition architecture. The TONN reduces the number of devices and cascaded stages while maintaining high training accuracy. Utilizing the III-V-on-silicon MOSCAP platform, the proposed TONN outperforms digital electronics ANN hardware and silicon photonic and phase-change material technologies in terms of footprint-energy efficiency.
Article
Chemistry, Physical
Chioma Vivian Ezeh, Kingsley O. Egbo, Jamaal-Deen Musah, Kin Man Yu
Summary: Gallium oxide (Ga2O3) has attracted significant interest for its wide bandgap and unique properties. Researchers have successfully modified the electronic bands of Ga2O3 through alloying with NiO to achieve p-type conducting Ga2O3-NiO thin films. The films exhibited different structural properties and optical behaviors depending on the Ni content. The p-type alloy films with a high concentration of Ni vacancies showed a wide tunability of bandgap and sub-gap absorption.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Jingshu Zhou, Tao Xiong, Zhengfeng Guo, Kaiyao Xin, Xiaoyu Wang, Honggang Gu, Yue-Yang Liu, Liyuan Liu, Juehan Yang, Zhongming Wei
Summary: Low-dimensional semiconductor materials with in-plane anisotropy, such as GaS, GaSe, and In2Se3, have shown impressive performances in microelectronics, optoelectronics, and ferroelectronics. Gallium telluride (GaTe), a typical III-group chalcogenide 2-D semiconductor with in-plane anisotropy, can form a spontaneous van der Waals heterostructure consisting of GaTe and its oxides. This heterostructure exhibits improved properties and shows polarization-sensitive behaviors, making it a promising candidate for polarization-sensitive photodetection in a broadband spectrum.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Review
Engineering, Electrical & Electronic
Nhat-Khuong Nguyen, Thanh Nguyen, Tuan-Khoa Nguyen, Sharda Yadav, Toan Dinh, Mostafa Kamal Masud, Pradip Singha, Thanh Nho Do, Matthew J. Barton, Hang Thu Ta, Navid Kashaninejad, Chin Hong Ooi, Nam-Trung Nguyen, Hoang-Phuong Phan
Summary: Wearable and implantable bioelectronics have made remarkable progress, but organic materials have limitations. Wide-band-gap materials are emerging as promising candidates for flexible electronics due to their excellent electrical and mechanical properties.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Muhammad Yusrul Hanna, Muhammad Aziz Majidi, Ahmad R. T. Nugraha
Summary: In this study, we evaluated the performance of thermoradiative (TR) cells using III-V group semiconductors and aimed to identify the most efficient TR cell material among GaAs, GaSb, InAs, and InP. The efficiency of TR cells, which convert thermal radiation into electricity, is affected by factors such as bandgap, temperature difference, and absorption spectrum. To create an accurate model, we considered sub-bandgap and heat losses and employed density-functional theory to determine the energy gap and optical properties of each material. Our findings indicate that the absorptivity of the material can decrease the efficiency of TR cells, especially when considering sub-bandgap and heat losses. However, the effect of absorptivity on TR cell efficiency varies among different materials. GaSb exhibited the highest power density, while InP demonstrated the lowest. GaAs and InP showed relatively high efficiency without sub-bandgap and heat losses. InAs had lower efficiency when not considering losses but displayed higher resistance to sub-bandgap and heat losses compared to other materials, making it the best TR cell material among the III-V group of semiconductors.
Article
Materials Science, Multidisciplinary
Aleksandr Perevedentsev, Hadhemi Mejri, Luis A. Ruiz-Preciado, Tomasz Marszalek, Uli Lemmer, Paul W. M. Blom, Gerardo Hernandez-Sosa
Summary: This report introduces polarized organic photodetectors based on directionally oriented blends of poly(3-hexylthiophene) and benchmark polymer or nonfullerene acceptors. A novel postprocessing scheme is advanced to ameliorate high dark-currents. The resulting polarized photodetectors exhibit broad enhancement in performance and show potential in photoelasticity analysis.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Qianyu Hou, Haifan You, Qing Cai, Hui Guo, Pengfei Shao, Danfeng Pan, Le Yu, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng
Summary: The research team designed and fabricated narrow-band UV-B AlGaN p-i-n photodiodes by optimizing the Al composition and thickness of the AlGaN layers. Introducing a polarization electric field enhanced the external quantum efficiency, resulting in a low dark current density and high photocurrent responsivity for the enhanced narrow-band photodiodes.
IEEE PHOTONICS JOURNAL
(2021)
Article
Materials Science, Ceramics
Soheil Mobtakeri, Yunus Akaltun, Ali Ozer, Merhan Kilic, Ebru Senadim Tuzemen, Emre Gur
Summary: The study investigated the effects of deposition pressure and growth power on the properties of Ga2O3 thin films deposited on sapphire and n-Si substrates. SEM images revealed a transition from 2D growth mode to 3D columnar growth mode with increasing deposition pressure. Annealing resulted in larger grain formation and similar transmittance values for thin films grown at different pressures. Additionally, a red shift in absorption edges and a decrease in band gap values were observed with increasing growth pressure.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Seung Min Lee, Yoonseo Jang, Jongho Jung, Jung Hwan Yum, Eric S. Larsen, Christopher W. Bielawski, Weijie Wang, Jae-Hyun Ryou, Hyun-Seop Kim, Ho-Young Cha, Jungwoo Oh
APPLIED SURFACE SCIENCE
(2019)
Article
Energy & Fuels
Sara Pouladi, Monika Rathi, Devendra Khatiwada, Mojtaba Asadirad, Seung Kyu Oh, Pavel Dutta, Yao Yao, Ying Gao, Sicong Sun, Yongkuan Li, Shahab Shervin, Keon-Hwa Lee, Venkat Selvamanickam, Jae-Hyun Ryou
PROGRESS IN PHOTOVOLTAICS
(2019)
Article
Engineering, Electrical & Electronic
Zhongjie Ren, Yi Lu, Hsin-Hung Yao, Haiding Sun, Che-Hao Liao, Jiangnan Dai, Changqing Chen, Jae-Hyun Ryou, Jianchang Yan, Junxi Wang, Jinmin Li, Xiaohang Li
IEEE PHOTONICS JOURNAL
(2019)
Article
Chemistry, Multidisciplinary
Jie Chen, Haoran Liu, Weijie Wang, Noor Nabulsi, Wenbo Zhao, Ja Yeon Kim, Min-Ki Kwon, Jae-Hyun Ryou
ADVANCED FUNCTIONAL MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Yongkuan Li, Sicong Sun, Ying Gao, Yao Yao, Eduard Galstyan, Pratap Rudra, Monika Rathi, Pavel Dutta, Sara Pouladi, Jae Hyun Ryou, Venkat Selvamanickam
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2019)
Article
Physics, Applied
Weijie Wang, Seung Min Lee, Sara Pouladi, Jie Chen, Shahab Shervin, Seonno Yoon, Jung Hwan Yum, Eric S. Larsen, Christopher W. Bielawski, Bikramjit Chatterjee, Sukwon Choi, Jungwoo Oh, Jae-Hyun Ryou
APPLIED PHYSICS LETTERS
(2019)
Article
Chemistry, Multidisciplinary
Won Hee Kim, Young Jae Jang, Ja-Yeon Kim, Myungsoo Han, MinJae Kang, Kiyong Yang, Jae-Hyun Ryou, Min-Ki Kwon
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Multidisciplinary
Nam-In Kim, Jie Chen, Weijie Wang, Mina Moradnia, Sara Pouladi, Min-Ki Kwon, Ja-Yeon Kim, Xiaohang Li, Jae-Hyun Ryou
Summary: This study developed a highly sensitive, noninvasive skin-attachable eye movement sensor that can accurately detect subtle eye movements, detect abnormal eye movements, and provide a continuous eye movement monitoring solution.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Physics, Applied
Wen Gu, Yi Lu, Rongyu Lin, Wenzhe Guo, Zihui Zhang, Jae-Hyun Ryou, Jianchang Yan, Junxi Wang, Jinmin Li, Xiaohang Li
Summary: The study shows that the undoped BAlN EBL can replace the conventional AlGaN EBL in LEDs, effectively addressing p-doping issues and demonstrating superior performance in electron blocking and hole injection.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Mina Moradnia, Sara Pouladi, Jie Chen, Nam-In Kim, Onosetale Aigbe, Jae-Hyun Ryou
Summary: HybCVD technique using chloride and hydride precursors is introduced to obtain ScAlN thin films, addressing the challenges in film quality and manufacturability. Numerical analysis of precursor thermodynamics and vapor-solid reactions evaluate the precursors' suitability and alloy composition control.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Chemistry, Multidisciplinary
Nam-In Kim, Miad Yarali, Mina Moradnia, Muhammad Aqib, Che-Hao Liao, Feras AlQatari, Mingtao Nong, Xiaohang Li, Jae-Hyun Ryou
Summary: To address the challenges posed by extreme environments in energy, transportation, aerospace, and defense applications, a piezoelectric sensor based on single-crystalline AlN transducers is developed. The sensor shows high sensitivities and output voltages up to 900 degrees C. Comparison with other materials highlights the importance of single crystallinity in piezoelectric devices for high-temperature operation. The use of AlN demonstrates its potential as a new solution for sensing in extreme environments.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mina Moradnia, Sara Pouladi, Muhammad Aqib, Jae-Hyun Ryou
Summary: This study investigates the growth conditions of Group-IIIb-transition-metal-alloyed wurtzite Group-IIIa-nitride (IIIb-IIIa-N) thin films. The theoretical thermodynamic analysis reveals the relationship between the relative amount of input precursors and the solid composition in different growth conditions. The findings provide guidance for improving the piezoelectric properties of lead-free piezoelectric materials.
Editorial Material
Engineering, Electrical & Electronic
Jae-Hyun Ryou, Sukwon Choi
Summary: High-electron-mobility transistors with diamond coating effectively dissipate heat in high-power electronics applications.
NATURE ELECTRONICS
(2022)
Article
Chemistry, Physical
Devendra Khatiwada, Monika Rathi, Pavel Dutta, Sicong Sun, Carlos Favela, Yao Yao, Yongkuan Li, Sara Pouladi, Jae-Hyun Ryou, Venkat Selvamanickam
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
P. Dutta, M. Rathi, D. Khatiwada, S. Sun, Y. Yao, B. Yu, S. Reed, M. Kacharia, J. Martinez, A. P. Litvinchuk, Z. Pasala, S. Pouladi, B. Eslami, J. -H. Ryou, H. Ghasemi, P. Ahrenkiel, S. Hubbard, V. Selvamanickam
ENERGY & ENVIRONMENTAL SCIENCE
(2019)
