Presentation 2025
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Heat Stability of Perovskite Solar Cells with Self-Assembled Electron
Transport Layer
Ryusei Emura, Takashi Funaki, Kohei Yamamoto, Naoyuki Nishimura,
Hiroyuki Yaguchi, Takurou N. Murakami
42nd European Photovoltaic Solar Energy Conference and Exibition (2CV.3.45) (Bilbao, Spain)
September 24, 2025
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Evaluation of Crystallinity of Single-Crystal Ge Membranes via
Germanium-on-Nothing Structures for Substrate Reuse Techniques
Wenbo Fan, Shuhei Yagi and Hiroyuki Yaguchi
2025 International Conference on Solid State Devices and Materials (E-1-03) (Yokohama, Japan)
September 16, 2025
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(In Japanese)
Growth of AlxIn1-xSb thin films by magnetron sputtering
Yuto Ariji, Hiroyuki Yaguchi, Sachie Fujikawa
The 86th JSAP
Autumn Meeting 2025 (7a-P04-5) (Nagoya, Japan)
September 7, 2025
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(In Japanese)
Growth and characterization of InSb1-xNx thin films by MBE
Yuki Shirakawa, Kosuke Teramae, Hiroyuki Yaguchi, Sachie Fujikawa
The 86th JSAP
Autumn Meeting 2025 (7a-P04-6) (Nagoya, Japan)
September 7, 2025
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(In Japanese)
Raman scattering characterization of InSb1-xNx thin films grown by sputtering
Kosuke Teramae, Hiroyuki Yaguchi, Sachie Fujikawa
The 86th JSAP
Autumn Meeting 2025 (7a-P04-7) (Nagoya, Japan)
September 7, 2025
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(In Japanese)
Fabrication and Optical Characterization of a Terahertz Quantum Cascade Laser with a 23 µm-Thick Active Region and a Single-Metal Plasmonic Waveguide
Takayuki Ishida, Tsung-Tse Lin, Koki Yabe, Yuki Tsuda, Yosuke Suzuki, Keita Miyagawa, Koichi Akiyama, Li Wang, Sachie Fujikawa, Hiroyuki Yaguchi, Hirayama Hidek
The 86th JSAP
Autumn Meeting 2025(8a-P02-1) (Nagoya, Japan)
September 8, 2025
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A new tri-layer Ni/Al/Au p-electrode in 281 nm UVB LED
Boosted EQE to 4.6%
Hamida Zia, Amina Yasin, Kohei Fujimoto, Hiroyuki Yaguchi, M Ajmal Khan, Hideki Hirayama
The 86th JSAP
Autumn Meeting 2025 (9a-N205-3) (Nagoya, Japan)
September 9, 2025
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(In Japanese)
Analysis of three-state double LO phonon scattering mechanism in GaN-based THz-QCL
Koki Yabe, Airu Takahashi, Akira Kaneko, Sachie Fujikawa, Hiroyuki Yaguchi, Shashank Mishra, Hideki Hirayama
The 86th JSAP
Autumn Meeting 2025 (9p-N301-7) (Nagoya, Japan)
September 9, 2025
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(In Japanese)
The Impact of the Electron Transport Layer on the Thermal Stability of Perovskite Solar Cells
Ryusei Emura, Takashi Funaki, Kohei Yamamoto, Naoyuki Nishimura, Hiroyuki Yaguchi, Takurou N. Murakami
The 86th JSAP
Autumn Meeting 2025 (9p-S302-2) (Nagoya, Japan)
September 9, 2025
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(In Japanese)
Effect of Residual PbI2 in the Perovskite Layer Fabricated by a Two-Step Deposition Method
Seima Ishii, Kohei Yamamoto, Hiroyuki Yaguchi, Takurou N. Murakami
The 86th JSAP
Autumn Meeting 2025 (10a-S201-6) (Nagoya, Japan)
September 10, 2025
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Epitaxy growth and characterization of Be-doped InSb thin films
Sachie Fujikawa, Hiroyuki Yaguchi
21st International Conference on Crystal Growth and Epitaxy (ICCGE-21) (HP11) (Xi'an, China)
August 7, 2025
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Realizing a High External Quantum Efficiency of 0.44% in 232 nm AlGaN-based far-UVC LED by Suppressing Relaxation in n-AlGaN Layer Via Homoepitaxy
Muhammad Ajmal Khan, Hiromitsu Sakai, M. Nawaz Sharif, Arata Sasaki, Amina Yasin, Yuya Nagata, Yukio Kashima, Mitsuhiro Muta, Yasushi Iwaisako, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Mon-P4) (Malmö, Sweden)
July 7, 2025
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Experimental and Theoretical Insights into the Relaxed or Strained 230 nm far-UVC LEDs as a Function of Quantum-Well Numbers
M. Nawaz Sharif, Hiromitsu Sakai, Kohei Fujimoto, Yuya Nagata, Hiroyuki Yaguchi, Muhammad Ajmal Khan, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Tue-4) (Malmö, Sweden)
July 8, 2025
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Nanoscopic Insights into the Structural and Optical Properties of a Far-UVC-LED: Detailed Characterization of Carrier Capture in Active Region
Frank Bertram, Gordon Schmidt, Peter Veit, Juergen Christen, M. Ajmal Khan, Kohei Fujimoto, Yuya Nagata, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Tue-18A) (Malmö, Sweden)
July 8, 2025
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Polarisation Assisted n-AlGaN Electron Injection Layer in 229 nm far-UVC LEDs for Hole Blocking and Current Density Enhancement
Muhammad Ajmal Khan, Hiromitsu Sakai, M. Nawaz Sharif, Yuya Nagata, Kohei Fujimoto, Amina Yasin, Mitsuhiro Muta, Yasushi Iwaisako, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Tue-20A)(Malmö, Sweden)
July 8, 2025
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Highly Reflective and Conductive New Ni/Al/Au p-electrode for 292 nm UVB LED on C-plane Sapphire
Hamida Zia, Amina Yasin, Fujimoto Kohei, Nagata Yuya, Yaguchi Hiroyuki, Muhammad Ajmal Khan, Hirayama Hideki
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Tue-P3) (Malmö, Sweden)
July 8, 2025
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Above Room Temperature Optical Gain in 3-15 THz Range GaN/AlGaN Quantum-Cascade Laser obtained by NEGF Analysis
Koki Yabe, Airu Takahashi, Akira Kaneko, Li Wang, Ke Wang, Sachie Fujikawa, Krishan Kumar, Shashank Mishra, Thomas Grange, Stefan Birner, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Thu-5) (Malmö, Sweden)
July 10, 2025
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Marked Enhancement of Optical Gain by Doping for 10 THz-band GaN-based Quantum-Cascade Laser Analyzed by NEGF method
Airu Takahashi, Koki Yabe, Akira Kaneko, Li Wang, Ke Wang, Sachie Fujikawa, Krishan Kumar, Shashank Mishra, Thomas Grange, Stefan Birner, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Thu-P13) (Malmö, Sweden)
July 10, 2025
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Design and Fabrication of GaN/AlGaN THz Quantum-Cascade Laser Structure on SiC Substrate
Akira Kaneko, Airu Takahashi, Koki Yabe, Li Wang, Ke Wang, Sachie Fujikawa, Krishan Kumar, Shashank Mishra, Hiroyuki Yaguchi, Hideki Hirayama
15th International Conference on Nitride Semiconductors (ICNS 15) (OD-Thu-P14) (Malmö, Sweden)
July 10, 2025
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(In Japanese)
Crystallinity evaluation of Ge membrane fabricated using germanium-on-nothing structures
Wenbo Fan, Shuhei Yagi, Hiroyuki Yaguchi
第22回「次世代の太陽光発電システム」シンポジウム
(第5回⽇本太陽光発電学会学術講演会) (6-4) (Tokyo)
July 4, 2025
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Growth of Zn doped and Sn modulation doped InSb1-xNx thin films by
DC/RF magnetron sputtering
Sachie Fujikawa, Yuto Ariji, and Hiroyuki Yaguchi
Compound Semiconductor Week 2025 (P8) (Banff, Canada)
May 28, 2025
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High-performance UVB and Far-UVC LEDs on Sapphire
Aiming for Inactivation of Viruses and Bacteria
Muhammad Ajmal Khan, Mitsuhiro Muta, Hiromitsu Sakai, Yukio Kashima, Hiroyuki Yaguchi,
Yasushi Iwaisako, Hideki Hirayama
46th Photonics and Electromagnetics Research Symposium (PIERS2025) (Abu Dhabi, United Arab Emirates)
May 6, 2025
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(In Japanese)
Analysis of optical gain mapping of GaN THz-QCL
considering doping concentration of core layer
Koki Yabe, Airu Takahashi, Akira Kaneko, Sachie Fujikawa,
Hiroyuki Yaguchi, Krishan Kumar, Shashank Mishra, Hideki Hirayama
The 72nd JSAP Spring Meeting 2025 (14p-K504-4) (Noda, Japan)
March 14, 2025
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(In Japanese)
Heat Stability of Perovskite Solar Cells with Self-Assembled Electron
Transport Layer
Ryusei Emura, Takashi Funaki, Kohei Yamamoto,
Naoyuki Nishimura, Hiroyuki Yaguchi, Takurou N. Murakami
The 72nd JSAP Spring Meeting 2025 (14p-P08-8) (Noda, Japan)
March 14, 2025
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(In Japanese)
Effects of Residual PbI2 on Perovskite Solar Cell’s Performance
Using the Stepwise Coating Method
Seima Ishii, Kohei Yamamoto, Naoto Eguchi, Hiroyuki Yaguchi, Takurou N.
Murakami
The 72nd JSAP Spring Meeting 2025 (14p-P08-18) (Noda, Japan)
March 14, 2025
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Aluminiumization-Assisted Influence on the Crystalline Quality of the AIN
Template Grown on c-Sapphire
Amina Yasin, Yuya Nagata, M. Nawaz Sharif, Hamida Zia, Hiroyuki Yaguchi,
M. Ajmal Khan, Hideki Hirayama
The 72nd JSAP Spring Meeting 2025 (16a-K401-6) (Noda, Japan)
March 16, 2025
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(In Japanese)
Investigation of annealing conditions for forming Germanium-on-Nothing structures
Wenbo Fan, Ryuji Ohshima, Yasushi Shoji, Takeyoshi Sugaya, Shuhei Yagi, Hiroyuki Yaguchi
The 72nd JSAP Spring Meeting 2025 (16p-P15-1) (Noda, Japan)
March 16, 2025