2016 - 2019 Construction of process and design basis for the realization of a new ultra-low loss nitride heterostructure transistors
2013 - 2018 GaN/Siベース半導体の確立とその社会実装
2014 - 2017 次世代省エネパワーデバイス用大口径高耐圧・低欠陥 GaN エピタキシャルウエハの開発
2015 - 2016 多元窒化物半導体ヘテロ構造を用いた超低損失パワーデバイスに関する研究
2015 - 2016 省エネ用縦型GaN/Siパワーデバイスに関する基盤技術開発
2013 - 2014 半導体ハイブリッドMOS電極構造を用いた超高感度FET型ガスセンサの開発
2012 - 2014 ハイブリッドナノカーボン太陽電池の創成
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Papers (112):
Yoshinobu Kometani, Tomoyuki Kawaide, Ssakura Tanaka, Takashi Egawa, Makoto Miyoshi. AlN/AlGaN heterojunction field-effect transistors with a high-AlN-mole-fraction Al0.72Ga0.28N channel grown on a single-crystal AlN substrate by metalorganic chemical vapor deposition. Japanese Journal of Applied Physics. 2024
Nan Hu, Takahiro Fujisawa, Akira Mase, Tomoki Kojima, Takashi Egawa, Makoto Miyoshi. Improved performance of InGaN/GaN multiple-quantum-wells photovoltaic devices on free-standing GaN substrates with TMAH treatment. Solar Energy Materials and Solar Cells. 2024. 275. 15. 113025-1-113025-7
Kouki Noda, Yuto Murakami, Hayata Toyoda, Kana Shibata, Youna Tsukada, Daichi Imai, Tetsuya Takeuchi, Makoto Miyoshi, Takao Miyajima. Characterizations of the sub-bandgap optical absorption in an undoped-GaN and a 90-nm-thick Al1-xInxN thin film on a sapphire substrate grown by MOCVD. Physica Status Solidi B: Basic Solid State Physics. 2024. 2400029-1-2400029-7
Tomoyuki Kawaide, Yoshinobu Kometani, Sakura Tanaka, Takashi Egawa, Makoto Miyoshi. Current collapse suppression in AlGaInN/GaN HEMTs with thin unintentionally doped GaN channel and AlN back barrier grown on single-crystal AlN substrate. Applied Physics Letters. 2024. 124. 18. 18210-1-18210-4
Takahiro Fujisawa, Nan Hu, Tomoki Kojima, Takashi Egawa, Makoto Miyoshi. Over 43%-power-efficiency GaInN-based photoelectric transducer on free-standing GaN substrate for optical wireless power transmission system. Semiconductor Science and Technology. 2024. 39. 4. 045010-1-045010-6
2023/11 - 14th International Conference on Nitride Semiconductors, ICNS-14 Outstanding Poster Award High-efficiency GaInN-based photovoltaic cells on free-standing GaN substrate for optical wireless power transmission system
2022/03 - The ISPlasma Prize 2022 The ISPlasma Prize, The 2022 Best Short Presentation Awards Effect of a Thin AlN Layer Inserted into the GaN Drift Layers on Reverse Breakdown Behavior for Fully Vertical GaN-on-Si Schottky Barrier Diodes
2021/09 - AIP Advances Editor's Pick Article Improved epilayer qualities and electrical characteristics for GaInN multiple-quantum-well photovoltaic cells and their operation under artificial sunlight and monochromatic light illuminations
2017 - Solid-State Electronics Editor's Choice Effect of well layer thickness on quantum and energy conversion efficiencies for InGaN/GaN multiple quantum well solar cell
2015 - Applied Physics Express Spotlights Nearly lattice-matched InAlN/AlGaN two-dimensional electron gas heterostructures grown by metalorganic chemical vapor deposition