Presentation 2025


  • 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
  • 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
  • (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
  • (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
  • (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
  • (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
  • 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
  • (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
  • (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
  • (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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • (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
  • 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
  • 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
  • (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
  • (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
  • (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
  • 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
  • (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