Presentation 2021-11-25
Indium Composition Dependence of Internal Quantum Efficiency in InGaN Quantum-Wells Measured by Simultaneous Microscopic Photoacoustic and Photoluminescence Spectroscopy
Keito Mori, Yuchi Takahashi, Yuya Morimoto, Atsushi A. Yamaguchi,
PDF Download Page PDF download Page Link
Abstract(in Japanese) (See Japanese page)
Abstract(in English) Accurate estimation of internal quantum efficiency (IQE) is necessary for comprehensive understanding of the carrier dynamics in InGaN quantum wells (QWs). In this study, we have measured the IQE values for a series of InGaN-QWs with systematically different indium compositions by using the simultaneous photoacoustic (PA) and photoluminescence (PL) measurements. It is observed that the IQE values decreased with increasing indium composition. Furthermore, we have analyzed the excitation power dependence of IQE values by using two essentially different theoretical model in order to check which model is correct, but it is found that both the models can explain the experimental results. Therefore, separate evaluation of the radiative and non-radiative lifetimes combined with the time-resolved PL measurements is needed.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) InGaN quantum well / carrier dynamics / internal quantum efficiency
Paper # ED2021-20,CPM2021-54,LQE2021-32
Date of Issue 2021-11-18 (ED, CPM, LQE)

Conference Information
Committee ED / CPM / LQE
Conference Date 2021/11/25(2days)
Place (in Japanese) (See Japanese page)
Place (in English) Online
Topics (in Japanese) (See Japanese page)
Topics (in English)
Chair Hiroki Fujishiro(Tokyo Univ. of Science) / Yuichi Nakamura(Toyohashi Univ. of Tech.) / Toshitada Umezawa(NICT)
Vice Chair Seiya Sakai(Hokkaido Univ.) / Hideki Nakazawa(Hirosaki Univ.) / Junichi Takahara(Osaka Univ.)
Secretary Seiya Sakai(Fjitsu Lab.) / Hideki Nakazawa(NTT) / Junichi Takahara(Ehime Univ.)
Assistant Ryota Isonoi(SCIOCS) / Yoshitugu Yamamoto(Mitsubishi Electric) / Yasuo Kimura(Tokyo Univ. of Tech.) / Fumihiko Hirose(Yamagata Univ.) / Noriko Bamba(Shinshu Univ.) / Shinsuke Tanaka(Fujitsu) / Nobuhiko Nishiyama(Tokyo Inst. of Tech.)

Paper Information
Registration To Technical Committee on Electron Devices / Technical Committee on Component Parts and Materials / Technical Committee on Lasers and Quantum Electronics
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Indium Composition Dependence of Internal Quantum Efficiency in InGaN Quantum-Wells Measured by Simultaneous Microscopic Photoacoustic and Photoluminescence Spectroscopy
Sub Title (in English)
Keyword(1) InGaN quantum well
Keyword(2) carrier dynamics
Keyword(3) internal quantum efficiency
1st Author's Name Keito Mori
1st Author's Affiliation Kanazawa Institute of Technology(Kanazawa Inst. of Tech.)
2nd Author's Name Yuchi Takahashi
2nd Author's Affiliation Kanazawa Institute of Technology(Kanazawa Inst. of Tech.)
3rd Author's Name Yuya Morimoto
3rd Author's Affiliation Kanazawa Institute of Technology(Kanazawa Inst. of Tech.)
4th Author's Name Atsushi A. Yamaguchi
4th Author's Affiliation Kanazawa Institute of Technology(Kanazawa Inst. of Tech.)
Date 2021-11-25
Paper # ED2021-20,CPM2021-54,LQE2021-32
Volume (vol) vol.121
Number (no) ED-259,CPM-260,LQE-261
Page pp.pp.29-32(ED), pp.29-32(CPM), pp.29-32(LQE),
#Pages 4
Date of Issue 2021-11-18 (ED, CPM, LQE)