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石井宏幸

Ishii, Hiroyuki

数理物質系 , 教授
Faculty of Pure and Applied Sciences , Professor

http://www.bk.tsukuba.ac.jp/~ishii/index.html

1. Effects of Cs/Sr intercalation on the structure and electrical conductivity of weathered biotite Kosetsu Hayakawa; Masakazu Muraguchi; Yumeno Masebo; Yohichiro Kojima (+3 著者) Mitsunori Honda
AIP Advances (2026) Semantic Scholar
2. Elucidation of the ionic conductivity mechanism of weathered biotite using first-principles calculation Rina Yabuta; Masato Oda; Masakazu Muraguchi; Hiroyuki Ishii (+1 著者) Mitsunori Honda
Japanese Journal of Applied Physics (2026) Semantic Scholar
3. Quinoid-controlled bond-length alternation enables high-mobility non-fused π-conjugated polymers Tsubasa Mikie; Keitaro Iguchi; Ryosuke Kamimura; Kenta Tanaka (+1 著者) Itaru Osaka
Chemical Science (2026) Semantic Scholar
4. Backbone rigidity promoting hole delocalization and enabling efficient charge generation with minimal voltage loss in nonfullerene organic photovoltaics Suruga, S.; Mikie, T.; Sato, Y.; Kohzuki, K. (+7 著者) Osaka, I.
Communications Materials 7: (2026) Semantic Scholar
5. Theoretical study of the mixed-orbital charge-transport characteristics of a zigzag-shaped organic semiconductor with a unique HOMO configuration Hiroshi Kajiwara; Masato Mitani; Hiroyuki Ishii; Toshihiro Okamoto
Applied Physics Express 18: (2025) Semantic Scholar
6. Multi-orbital hybridization in a one-dimensional monolayer of DPh-BTBT Yutaro Ono; Masato Iwasawa; Ryohei Tsuruta; Tomohiro Nobeyama (+4 著者) Yoichi Yamada
NANOSCALE 17: 21729 (2025) Semantic Scholar
7. Structural Modification of Weathered Biotite Induced 6by Cs Intercalation Yumeno Masebo; Mitsunori Honda; Kosetsu Hayakawa; Masato Oda (+3 著者) Masakazu Muraguchi
E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY (2025) Semantic Scholar
8. Development of XAFS Analysis to Elucidate the Structural Change of Weathered Biotite under High Temperature Kosetsu Hayakawa; Masakazu Muraguchi; Yumeno Masebo; Yohichiro Kojima (+3 著者) Mitsunori Honda
E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY 23: 290 (2025) Semantic Scholar
9. Side-Chain Dipolar Character Controls Threshold Voltage in So-lution-Processed Organic Single-Crystal Transistors Shohei Kumagai; Takeru Koguma; Takuya Seki; Go Watanabe (+4 著者) Toshihiro Okamoto
(2025)
10. Evolution of electronic correlation in highly doped organic two-dimensional hole gas Naotaka Kasuya; Tomoki Furukawa; Hiroyuki Ishii; Nobuhiko Kobayashi (+4 著者) Jun Takeya
Nature Communications 16: (2025) Semantic Scholar
11. Enhanced performances of n-type Ge Schottky photodetectors with short-wave infrared transparent conductive oxide electrodes Saputro, R.H.; Tanaka, T.; Ishii, H.; Maeda, T.
Japanese Journal of Applied Physics Part 1 Regular Papers and Short Notes and Review Papers 64: (2025) Semantic Scholar
12. Phenyl- versus cyclohexyl-terminated substituents: comparative study on aggregated structures and electron-transport properties in n-type organic semiconductors Shohei Kumagai; Takeru Koguma; Yutaro Arai; Go Watanabe (+2 著者) Toshihiro Okamoto
Molecular Systems Design & Engineering 10: 32 (2025) Semantic Scholar
13. The efficient method for searching stable structures in herringbone-phase organic semiconductors using density functional theory Shuya Hakata; Hiroyuki Ishii; Hirokazu Takaki; Toshihiro Okamoto (+1 著者) Nobuhiko Kobayashi
Applied Physics Express 17: (2024) Semantic Scholar
14. Order-N calculations for thermoelectric power factor based on linear response theory Hiroyuki Ishii; Nobuhiko Kobayashi; Kenji Hirose
Journal of Physics: Condensed Matter 36: (2024) Semantic Scholar
15. Direct observation of the electronic structure and many-body interactions of low-mobility carriers in perylene diimide derivative Jaseela Palassery Ithikkal; Keisuke Fukutani; Fumi Nishino; Taketoshi Minato (+4 著者) Satoshi Kera
Applied Physics Letters 125: (2024) Semantic Scholar
16. Powder x-ray diffraction analysis with machine learning for organic-semiconductor crystal-structure determination Naoyuki Niitsu; Masato Mitani; Hiroyuki Ishii; Nobuhiko Kobayashi (+3 著者) Jun Takeya
Applied Physics Letters 125: (2024) Semantic Scholar
17. Sustainable thermoelectric materials: Utilizing Fukushima weathered biotite via molten salt treatment Mitsunori Honda; Yui Kaneta; Masakazu Muraguchi; Kosetsu Hayakawa (+3 著者) Takuya Goto
AIP Advances 14: (2024) Semantic Scholar
18. Thiophene-fused fulminenes (FuDTs): promising platforms for high-mobility organic semiconductors with a zigzag shape Shohei Kumagai; Takumi Ishida; Shin Kakiuchi; Masakazu Yamagishi (+3 著者) Toshihiro Okamoto
Chemical Communications 60: 11152 (2024) Semantic Scholar
19. Asymmetrically Functionalized Electron‐Deficient π‐Conjugated System for Printed Single‐Crystalline Organic Electronics Craig P. Yu; Shohei Kumagai; Michitsuna Tsutsumi; Tadanori Kurosawa (+9 著者) Toshihiro Okamoto
Advanced Science 10: (2023) Semantic Scholar
20. Electronic and magnetic properties of CoSb₃, Cr-doped CoSb₃, and related compound thin films Kazuaki Kobayashi; Hirokazu Takaki; Masato Shimono; Hiroyuki Ishii (+2 著者) Takao Mori
Japanese Journal of Applied Physics 62: SC1046 (2023) Semantic Scholar

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1. Molecular Technology:Energy Innovation Hiroyuki Ishii
Wiley-VCH 2018年 (ISBN: 9783527341634)
2. 機能構造科学入門－3D活性サイトと物質デザインー小林伸彦; 石井宏幸; 広瀬賢二 (担当:共著, 範囲:第6章「電気伝導理論」pp.111--121)
丸善出版 2016年 (ISBN: 9784621300602)
3. Electronic processes in organic electronics : bridging nanostructure, electronic states and device properties Hiroyuki Ishii
Springer 2014年 (ISBN: 9784431552055)

21. 領域７・３合同シンポジウム「有機半導体におけるスピン自由度と電荷ダイナミクス」 “時間依存波束拡散法を用いた有機半導体のキャリア輸送計算” 石井宏幸
日本物理学会 2013年秋季大会招待有り
22. “Wave Packet Dynamical Calculations for Charge Transport of Disordered Organic Semiconductors”
KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2014) 招待有り
23. “Large-scale charge transport simulation of disordered organic semiconductors: Role of molecular vibrations, static disorder and polaron formations”
European Materials Research Society (E-MRS), Spring meeting, 2014 招待有り
24. イブニングセッション「社会の持続的発展のための分子技術」 “高性能有機材料創出のための分子描像に立脚した大規模量子伝導計算理論の確立とその応用” 石井宏幸
日本化学会第94春季年会招待有り
25. “高移動度有機半導体開発のための大規模伝導計算～揺らぐ分子・結晶構造中の電子の流れ～” 石井宏幸
5th CSJ化学フェスタ 2015 招待有り
26. French-Japanese symposium on Molecular Technology "Electron transport simulations for various molecular materials"
Eurosites George V 招待有り
27. "高移動度有機半導体開発のための大規模伝導計算～揺らぐ分子・結晶構造中の電子の流れ～” 石井宏幸
2016年第11回有機デバイス院生研究会招待有り
28. [Emerging TFT] "Prediction of Intrinsic Charge Mobility for Materials Developments of Organic Semiconductors"(AMD2-1)
International Display Workshops 2020 (IDW'20) 招待有り
29. [Short Course A; Recent advances in organic electronics] "Charge transport simulations based on density functional theory"
International conference on Solid State Devices and Materials 2020 (SSDM2020) 招待有り
30. “有機半導体開発のための移動度予測シミュレーション” 石井宏幸
有機エレクトロニクス研究会（オンライン）招待有り
31. "Charge transport calculations using wave-packet dynamics based on density functional theory for organic semiconductors"
EMN Meeting on Organic Electronics and Photonics 招待有り
32. シンポジウム「深化する有機半導体結晶：量子解放の分子化学にむけて」”第一原理に基づく有機半導体の電子伝導シミュレーション～電子の遍歴性と局在性が紡ぐ伝導物性～” 石井宏幸
2018年第79回応用物理学会秋季学術講演会招待有り
33. 領域７シンポジウム「有機半導体の構造・キャリア輸送制御の最前線」”キャリア輸送理論による有機半導体の設計” 石井宏幸
日本物理学会 2018年秋季大会招待有り
34. "有機半導体の電気伝導物性における動的乱れと静的乱れの影響" 石井宏幸
第5回分子機能研究会招待有り