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Title: Internal quantum efficiency of radiation in a bulk CH3NH3PbBr3 perovskite crystal quantified by using the omnidirectional photoluminescence spectroscopy
Authors: Kojima, K.
Ikemura, K.
Matsumori, K.
Yamada, Y.
Kanemitsu, Y.
Chichibu, S. F.
Author's alias: 小島, 一信
池村, 賢一郎
松森, 航平
山田, 泰裕
金光, 義彦
秩父, 重英
Issue Date: Jul-2019
Publisher: AIP Publishing
Journal title: APL Materials
Volume: 7
Issue: 7
Thesis number: 071116
Abstract: The internal quantum efficiency (IQE) of radiation for bulk CH3NH3PbBr3 crystals was quantified by using omnidirectional photoluminescence spectroscopy. The angle-resolved photoluminescence revealed that the emission with photon energies higher than the absorption-edge shows a Lambertian distribution and that the light extraction efficiency is determined by the escaping cone. The IQE value strongly depends on the photo-excitation density (P), and a CH3NH3PbBr3 crystal fabricated under the methylammonium-rich conditions gave the maximum IQE of 62.5% under P = 28 W/cm2. A further increase in P gave rise to the decrease in IQE due to the Auger effects.
Description: ペロブスカイト半導体の発光量子効率計測に成功. 京都大学プレスリリース. 2019-08-07.
Rights: ©2019 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
URI: http://hdl.handle.net/2433/243259
DOI(Published Version): 10.1063/1.5110652
Related Link: http://www.kyoto-u.ac.jp/ja/research/research_results/2019/190731_1.html
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