Similar to semiconductor crystals, we have succeeded with perovskite crystals to calculate IQE from ODPL measurement by utilizing the property of these crystals to only make green light emission upwards. As a result of this, IQE reached at least 62.5 %, and we found IQE fluctuates greatly depending on whether methylammonium ions are excessive or deficient.
Prof. Kazunobu Kojima and Prof. Shigefusa Chichibu, Institute of Multidisciplinary Research for Advanced Materials, Tohoku University,
Prof. Yasuhiro Yamada and Mr. Kohei Matsumori, Graduate School of Science, Chiba University,
Prof. Yoshihiko Kanemitsu, Institute for Chemical Research, Kyoto University.
K. Kojima, K. Ikemura, K. Matsumori, Y. Yamada, Y. Kanemitsu, and S. F. Chichibu, APL Materials, 7, 071116 (2019);licensed under a Creative Commons Attribution (CC BY) license.
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