|
Affiliation |
Engineering educational research section Electrical and Electronic System Program |
|
Title |
Professor |
|
Homepage |
|
|
External Link |
|
|
Related SDGs |
|
NISHIOKA Kensuke
|
|
|
Degree 【 display / non-display 】
-
Doctor (Engineering) ( 2004.3 Nara Institute of Science and Technology )
Research Interests 【 display / non-display 】
-
Photovoltaic
-
Nano and material
Research Areas 【 display / non-display 】
-
Energy Engineering / Earth resource engineering, Energy sciences
-
Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials
Education 【 display / non-display 】
-
Nara Institute of Science and Technology Graduate School of Materials Science Materials Science
- 2004.3
Country：Japan
-
Osaka University Engineering Science Department of Chemical Science and Engineering
- 1998.3
Country：Japan
Campus Career 【 display / non-display 】
-
University of Miyazaki Engineering educational research section Electrical and Electronic System Program Professor
2025.04 - Now
-
University of Miyazaki Engineering educational research section Electrical and Electronic Engineering Program Professor
2024.04 - 2025.03
-
University of Miyazaki Engineering educational research section Research & Development Center for Sustanable Energy and Environmental Engineering Professor
2016.11 - 2024.03
-
University of Miyazaki Faculty of Engineering Department of Applied Physics Structural mathematical principle science course Associate Professor
2007.10 - 2016.10
External Career 【 display / non-display 】
-
Japan Advanced Institute of Science and Technology Assistant Professor
2004.4 - 2007.10
Professional Memberships 【 display / non-display 】
-
日本太陽光発電学会
2020.10
-
EU PVSEC
2020.4
-
IEEE PVSC
2020.4
-
フロンティア太陽電池セミナー
2018.4
-
宮崎県水素委員会
2017.4
Papers 【 display / non-display 】
-
Development of total energy simulator for high altitude platform station operation Reviewed
Mukai N., Araki K., Nishioka K., Okada K., Ota Y.
Solar Energy Materials and Solar Cells 296 2026.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Solar Energy Materials and Solar Cells
The rise of sustainable communication networks marks a transformative era in connecting our world, and non-terrestrial networks (NTN), especially high-altitude platform stations (HAPS), are at the forefront of this revolution. These innovative systems are not only vital for emergency communications and reaching remote areas, but they also embody our collective commitment to a sustainable and resilient future. Our groundbreaking study introduces an advanced energy simulation algorithm for HAPS, meticulously accounting for environmental factors that influence photovoltaic power generation. By modeling energy consumption across various flight phases, our findings reveal that solar energy production varies with time and location, with westward evening flights demonstrating peak efficiency. A comprehensive three-day simulation near Miyazaki Airport validates the extraordinary potential of HAPS, inspiring confidence in their practical application. Contrary to conventional beliefs that PV outputs remain stable at high altitudes due to minimal cloud cover, our measurements uncovered remarkable fluctuations shaped by curved-shaped behavior. We have successfully modeled this unusual phenomenon using sophisticated tensor-vector computation, paving the way for more reliable and efficient PV system designs.
-
Oshimo T., Motomura Y., Tabata K., Yamada T., Aonuki S., Ochiai N., Suzuki Y., Kashiwakura K., Toriumi Y., Takahashi M., Suzuki J., Aoyama R., Uchida S., Akahane K., Nishioka K., Asami M., Arai M.
Physica Status Solidi A Applications and Materials Science 223 ( 2 ) 2026.1
Language：English Publishing type：Research paper (scientific journal) Publisher：Physica Status Solidi A Applications and Materials Science
Herein, InGaAsP photovoltaic devices are fabricated for 1.06 μm band optical wireless power transmission. The fabrication process incorporates multi-junctions through the introduction of tunnel junctions, an increase in the thickness of the surface electrode, and an outer circular electrode. The epitaxial layers are grown via the metal–organic vapor-phase epitaxy method. Multi-junctions are realized via the utilization of Type II tunnel junctions. Results show that an increase in the thickness of the photoresist results in the fabrication of a thicker electrode. The implementation of an outer circular electrode results in a maximum power conversion efficiency that exceeds 44% at a laser irradiation intensity of 1.5 W cm<sup>−2</sup>.
-
Araki K., Ota Y., Matsushita S., Tsuji R., Nishioka K.
Solar Energy Materials and Solar Cells 294 2026.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Solar Energy Materials and Solar Cells
Photovoltaic (PV) modules are crucial power sources for automobiles. The fragility of solar cells and frequent vibrations and impacts experienced by car bodies pose significant risks to the reliability of vehicle-integrated photovoltaics (VIPV). Standard PV module designs use soft resins, such as Ethylen-Vinyl Acetate (EVA), to dampen vibrations; however, these materials are ineffective at the higher vibration frequencies encountered in in-vehicle applications. This study employed a laser Doppler vibrometer (LDV) to nondestructively detect cell vibrations and confirm the resonant frequency of solar cells in VIPV modules. This research aims to determine whether the LDV method can detect the independent vibration motion of a solar cell if the solar cells resonate independently within the module, and whether the resonance frequency is close to the natural resonant frequency of the structure. This study also explored the potential of designing resonance-resistant VIPV modules. These findings indicate that the LDV can detect the resonance of solar cells within the vibration frequency range of car roofs. Owing to the low damping factors, the solar cells vibrate independently of the glass cover, with the vibration energy at resonance reaching up to 20 times the normal level. This mechanical resonance poses a substantial threat to the reliability of the VIPV. The study concluded that while eliminating the source of vibration is impractical, making the structure less susceptible to vibration through design modifications is a viable solution, increasing the natural resonance frequency above 2000 Hz.
-
Effect of solar illumination on InGaAsP photovoltaic cell for optical wireless power transmission using 1000-nm-range light source Reviewed
AONUKI Sho, OSHIMO Takaya, TABATA Kotona, YAMADA Takeru, SUZUKI Junichi, AOYAMA Reo, UCHIDA Shiro, AKAHANE Koichi, OCHIAI Natsuha, SUZUKI Yukiko, KASHIWAKURA Kazuto, NISHIOKA Kensuke, ARAI Masakazu, TORIUMI Yohei, TAKAHASHI Madoka
Proceedings of JSES conference 2025 ( 0 ) 253 - 256 2025.11
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Solar Energy Society
-
Aonuki S., Oshimo T., Tabata K., Yamada T., Suzuki J., Aoyama R., Uchida S., Akahane K., Ochiai N., Suzuki Y., Kashiwakura K., Nishioka K., Arai M., Toriumi Y., Takahashi M.
IEEE Transactions on Electron Devices 72 ( 12 ) 6829 - 6835 2025.10
Publishing type：Research paper (scientific journal) Publisher：IEEE Transactions on Electron Devices
We fabricated a single-junction InGaAsP laser power converter (LPC) with an active area of 1 cm2 for 1064 nm laser applications using metalorganic chemical vapor deposition. To suppress series resistance (RS) losses under high-power laser irradiation, an 11-μm-Thick Au/Ag surface electrode with a width of 23 μm and a shadowing loss of 7% was formed by electroplating. The device exhibited the internal quantum efficiency (IQE) of 0.909 at 1065 nm and a temperature coefficient of 0.22%rel.K1. The fill factor (FF) exhibited a maximum of 76.9% at 3.0 W_cm-2, attributed to the thick surface electrode. The RS was calculated to be 1:3 × 10-2 ω cm2 by fitting the JV curves under 4.0 W_cm 2 irradiation using a onediode model. This result corresponds to an approximately 19% reduction relative to that of the previously reported InGaAsP LPC with a 3.2-μm-Thick Au/Ag electrode and an active area of 0.06 mm2. A conversion efficiency (η) of 42.0% and an FF of 76.7% were achieved in the singlejunction InGaAsP LPC with an active area of 1 cm2 under 4.0 W_cm-2. To the best of our knowledge, these represent the highest reported values for any single-junction LPC designed for 1064 nm lasers with an active area ≤ 1 cm2. Power loss analysis revealed that the RS caused FF and ≤ losses of 3.9%abs. and 2.1%abs.at 4.0 W_cm-2, respectively. The obtained FF to that in the theoretical limit ratio implied that the thick surface electrode enhanced the high laser irradiation resistance. This technique can be applied to any other LPCs to mitigate the FF degradation under high laser irradiation. .
Books 【 display / non-display 】
-
水素の製造、輸送・貯蔵技術と材料開発 事例集
西岡賢祐（ Role： Contributor）
㈱技術情報協会 2019.4
Language：Japanese Book type：Scholarly book
-
Concentrator Photovoltaic Systems: Introduction, Wiley Encyclopedia of Electrical and Electronics Engineering
Kensuke Nishioka, Yasuyuki Ota（ Role： Joint author）
John Wiley & Sons, Inc. 2017.11
Total pages：12 Responsible for pages：12 Language：English Book type：Dictionary, encyclopedia
-
太陽熱発電の最新動向
西岡賢祐 (玉浦裕 監修)（ Role： Joint author）
シーエムシー出版 2014.11
Language：Japanese Book type：Scholarly book
-
新太陽エネルギー利用ハンドブック 第Ⅴ編 太陽光発電技術
西岡賢祐（ Role： Joint author）
一般社団法人日本太陽エネルギー学会 2013.12
Language：Japanese Book type：Scholarly book
-
高効率太陽電池
山口真史 監修（ Role： Joint author）
NTS出版 2012.5
Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
-
太陽光由来の貯蔵可能燃料 Invited
西岡賢祐
カーボン・エネルギーコントロール社会協議会 (CanApple): CanAppleニュース ( 230 ) 2022.4
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
-
世界一の効率を達成した太陽光からの水素製造 Invited
西岡 賢祐
経済産業省 九州経済産業局 水素とともに描く地域・企業の未来 事例から紐解く！九州水素ガイドブック ( 49 ) 2022.4
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
-
MBD活用デジタル制御の太陽光発電・水素製造システム Invited
中島 善康、米澤 遊、太田 靖之、西岡 賢祐
エネルギー・資源 43 ( 251 ) 44 - 49 2022.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
-
最新の太陽光発電応用技術 Invited Reviewed
西岡賢祐
オプトニューズ テクノロジートレンド 15 ( 3 ) 16 - 20 2020.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
-
Multivariate Analysis Using R for Various Climatic Effects on the Output Performances of CIGS and Multi-Crystalline Si Photovoltaic Systems Installed in Miyazaki, Japan
Kyaw Myo WIN, Yasuyuki OTA, Kensuke NISHIOKA, Tatsuya SAKODA, Noriyuki HAYASHI
宮崎大学工学部紀要 49 119 - 127 2020.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：国立大学法人宮崎大学
Presentations 【 display / non-display 】
-
Development of solar irradiance prediction technology using fisheye image for vehicle-integrated photovoltaic power generation International conference
Nobuteru Takeshita, Naoki Mukai, Kenji Araki, Kensuke Nishioka, Yasuyuki Ota
PV in Motion 2025 (ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan) PV in Motion 2025
Event date： 2025.3.12 - 2025.3.14
Language：English Presentation type：Poster presentation
Venue：ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan
-
Principal Component Analysis for Solar Radiation on Vehicle Roof International conference
Kaiki Matsubayashi, Kenji Araki, Yasuyuki Ota, Shinya Iwasaki, Yohei Hosokawa, and Kensuke Nishioka
PV in Motion 2025 (ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan) PV in Motion 2025
Event date： 2025.3.12 - 2025.3.14
Language：English Presentation type：Oral presentation (general)
Venue：ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan
-
Direct detection technique of vibration and resonance of the solar cells inside the VIPV modules International conference
Yasuyuki Ota, Kenji Araki, Shota Matsushita, Ryota Tsuji, Yuhi Honda, and Kensuke Nishioka
PV in Motion 2025 (ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan) PV in Motion 2025
Event date： 2025.3.12 - 2025.3.14
Language：English Presentation type：Poster presentation
Venue：ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan
-
PV on Heavy Duty Vehicles (HDVS): Validation of the fuel-saving merits International conference
Kensuke Nishioka, Kenji Araki, Taiyou Niina, Takumi Konuma, Makoto Tanaka, Yasuyuki Ota, and Shiro Sakamoto
PV in Motion 2025 (ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan) PV in Motion 2025
Event date： 2025.3.12 - 2025.3.14
Language：English Presentation type：Poster presentation
Venue：ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan
-
Development of Total Energy Simulator for High Altitude Platform Station Operation International conference
Naoki Mukai, Kenji Araki, Kensuke Nishioka, Kohei Okada, and Yasuyuki Ota
PV in Motion 2025 (ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan) PV in Motion 2025
Event date： 2025.3.12 - 2025.3.14
Language：English Presentation type：Oral presentation (general)
Venue：ANA Holiday Inn Resort Miyazaki, Miyazaki, Japan
Industrial property rights 【 display / non-display 】
-
熱電材料および熱電モジュール
吉野 賢二,永岡 章,西岡 賢祐,増田 泰造
Applicant：宮崎大学,トヨタ自動車株式会社
Application no：2020-199274 Date applied：2020.12.1
Announcement no：2022-087370 Date announced：2022.6.13
Patent/Registration no：7548796 Date registered：2024.9.2
Country of applicant：Domestic Country of acquisition：Domestic
-
光触媒塗工液、太陽光発電システムカバー、及びその製造方法
北川武, 廣瀬貴文, 高見和之, 西岡賢祐
Applicant：宇部日東化成株式会社,宮崎大学
Application no：2012-050535 Date applied：2012.3.7
Announcement no：特開2013-185043 Date announced：2013.9.19
Patent/Registration no：----
Country of applicant：Domestic
-
シリコン酸化膜のパターニング方法
西岡賢祐, 伊藤拓也
Applicant：宮崎大学
Application no：特願2010-190367 Date applied：2010.8.27
Announcement no：特開2012-049343 Date announced：2012.3.8
Patent/Registration no：特許5594882 Date registered：2014.8.15
Country of applicant：Domestic
-
シリコン酸化膜からのOH基除去法
西岡賢祐, 伊藤拓也
Applicant：宮崎大学
Application no：特願2010-151383 Date applied：2010.7.1
Announcement no：特開2012-015379 Date announced：2012.1.19
Patent/Registration no：----
Country of applicant：Domestic
-
微細流路の形成方法
西岡賢祐, 末藤豪
Applicant：宮崎大学
Application no：特願2009-206147 Date applied：2009.9.7
Announcement no：特開2011-060846 Date announced：2011.3.24
Patent/Registration no：特許第5322173号 Date registered：2013.7.26
Country of applicant：Domestic
Awards 【 display / non-display 】
-
35th International Photovoltaic Science and Engineering Conference (PVSEC) Oral Presentation Award
2024.11 35th International Photovoltaic Science and Engineering Conference Organizing Committee PV for HAPS (High Altitude Platform): Tensor-Matrix-based modeling and measurement validation
Kenji Araki, Kohei Okada, Naoki Mukai, Shota Matsushita, Seiichi Kiyama, Yasuyuki Ota, Koji Nishiyama, Kensuke Nishioka
Award type：Award from international society, conference, symposium, etc.
-
35th International Photovoltaic Science and Engineering Conference (PVSEC) Poster Award
2024.11 35th International Photovoltaic Science and Engineering Conference Organizing Committee Rapid Generation of Solar Spectrum with Sensor Photodiode Arrays
Kaiki Matsubayashi, Kenji Araki, Yasuyuki Ota, Kensuke Nishioka
Award type：Award from international society, conference, symposium, etc.
-
学術研究者支援奨励賞
2024.8 株式会社九電工 地域のエネルギーと農資源を循環する地産地消システムの開発
西岡 賢祐
Award type：Award from publisher, newspaper, foundation, etc.
-
OWPT2024 Paper Award
2024.4 OWPT2024 conference committee High Efficiency (> 40%) InGaAsP Photovoltaic Device for 1.06-µm-range Laser Power Transmission
Yuga Motomura, Takaya Oshimo, Masahiro Koga, Kosuke Watanebe, Shiro Uchida, Kouichi Akahane, Yukiko Suzuki, Natsuha Ochiai, Kazuto Kashiwakura, Youhei Toriumi, Kensuke Nishioka, Masakazu Arai
Award type：Award from international society, conference, symposium, etc.
-
第13回半導体材料・デバイスフォーラム ポスター発表優秀賞
2022.10 第13回半導体材料・デバイスフォーラム 実行委員会 Ag混晶による熱電変換材料(Cu1-xAgx)2ZnSnS4の伝導型制御
岡本 晃一，永岡 章，重枝 佑輔，吉野 賢二，西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc.
Grant-in-Aid for Scientific Research 【 display / non-display 】
-
固体高分子水電解における不純物起因劣化メカニズムの解明および特性回復手法の確立
Grant number：19K12401 2019 - 2022.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
-
高効率太陽電池材料の高倍率集光時におけるキャリアの動的ふるまいの解明
Grant number：25289360 2013.04 - 2018.03
科学研究費補助金 基盤研究(B)
Authorship：Principal investigator
高効率太陽電池材料の高倍率集光時におけるキャリアの動的ふるまいの解明
-
直線偏光Nd:YAGレーザーによる微細金属ドットの2次元規則配列加工に関する研究
Grant number：18760545 2006.04 - 2008.03
科学研究費補助金 若手研究(B)
コヒーレントな直線偏光Nd:YAGパルスレーザーを試料に照射することにより溶融金属内に自発的に発生するレーザー誘導周期的エネルギー密度分布を利用し、位置と大きさを制御した規則性配列微細金属ドットの形成に取り組んだ。直線偏光Nd:YAGパルスレーザーをSi酸化膜上に堆積したニッケル薄膜に照射するだけで、位置と大きさを制御した規則性配列微細ニッケルドットを形成することに成功した。
Available Technology 【 display / non-display 】
-
太陽光発電由来水素およびメタンの生成
各種太陽光発電システムの高精度発電量予測
地域のエネルギーと農資源を循環する低コストシステムMessage：太陽光発電の新規応用について研究開発を行っています。
メガソーラーの最適設置方法の検討や発電量予測について実績があります。
Committee Memberships 【 display / non-display 】
-
35th International Photovoltaic Science and Engineering Conference Technical program committee (area chair)
2024.11
Committee type：学協会
-
EU PVSEC 41st European Photovoltaic Solar Energy Conference and Exhibition, Scientific Committee
2024.9
Committee type：学協会
-
宮崎市SDGs対応型施設園芸推進協議会 会長
2024.7 - 2025.3
Committee type：自治体
-
環境省令和６年度運輸部門の脱炭素化に向けた先進的システム社会実装促進事業にかかる調査検討事業等委託業務における実証事業審査委員会 委員
2024.7 - 2025.3
Committee type：政府
-
第21回「次世代の太陽光発電システム」シンポジウム プログラム委員長
2024.7
Committee type：学協会
Social Activities 【 display / non-display 】
-
技術情報協会 水電解技術の開発動向とCO2フリー水素の製造技術, 集光型太陽電池を利用したPEM水電解と水素製造技術
Role(s)： Lecturer
2022.3.31
Audience： College students, Graduate students, Researchesrs, General, Company
Type：Seminar, workshop
高効率太陽光発電を活用する再生可能エネルギー由来水素およびメタン生成
-
宮崎県教育委員会 宮崎県県立学校長協会理数部会 令和3年度 第8回 宮崎県高等学校課題研究発表大会 自然科学講演会, 宮崎から再生可能エネルギー100%を目指して
Role(s)： Lecturer
2022.3.15
Audience： College students, Graduate students, Researchesrs, General, Company
Type：Lecture
高効率太陽光発電を活用する再生可能エネルギー由来水素およびメタン生成
-
宮崎大宮高等学校 グローバル協創I グローバルプロジェクトII, 宮崎大学カーボンニュートラル
Role(s)： Lecturer
2021.12.24
Audience： College students, Graduate students, Researchesrs, General, Company
Type：Lecture
高効率太陽光発電を活用する再生可能エネルギー由来水素およびメタン生成
-
令和3年度宮崎市環境学習指導者養成講座, 再生可能エネルギー100％の未来へ
Role(s)： Lecturer
2021.12.18
Audience： College students, Graduate students, Researchesrs, General, Company
Type：Lecture
高効率太陽光発電を活用する再生可能エネルギー由来水素およびメタン生成
-
日本太陽光発電学会 次世代太陽電池セル・モジュール分科会
Role(s)： Lecturer
2021.6.8
Audience： College students, Graduate students, Researchesrs, General, Company
Type：Seminar, workshop
高効率太陽光発電を活用する再生可能エネルギー由来水素およびメタン生成
Academic Activities 【 display / non-display 】
-
宮崎県太陽電池・半導体関連産業振興協議会
Type：Academic research
-
水素等を活用したエネルギー地産地消推進に関する構想策定委員会
Type：Academic research