doi:info:doi/10.1021/acsnano.7b05442

Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield 利用統計を見る

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アイテムタイプ	学術雑誌論文 = Journal Article
言語	英語
キーワード	cesium lead halide perovskite nanocrystals, colloidal nanoparticles, perovskite quantum dot, photoluminescence quantum yield, stable perovskite
著者	Liu Feng Zhang Yaohong Ding Chao Kobayashi Syuusuke Izuishi Takuya Nakazawa Naoki Toyoda Taro Ohta Tsuyoshi Hayase Shuzi Minemoto Takashi Yoshino Kenji Dai Songyuan Shen Qing
著者所属	Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications Faculty of Informatics and Engineering, The University of Electro-Communications, CREST, Japan Science and Technology Agency (JST) Faculty of Life Science and Systems Engineering, Kyushu Institute of Technology Faculty of Life Science and Systems Engineering, Kyushu Institute of Technology, CREST, Japan Science and Technology Agency (JST) Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, Ritsumeikan University, CREST, Japan Science and Technology Agency (JST) Department of Electrical and Electronic Engineering, Miyazaki University, CREST, Japan Science and Technology Agency (JST) Beijing Key Laboratory of Novel Thin Film Solar Cells, State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources Faculty of Informatics and Engineering, The University of Electro-Communications, CREST, Japan Science and Technology Agency (JST)
抄録	Perovskite quantum dots (QDs) as a new type of colloidal nanocrystals have gained significant attention for both fundamental research and commercial applications owing to their appealing optoelectronic properties and excellent chemical processability. For their wide range of potential applications, synthesizing colloidal QDs with high crystal quality is of crucial importance. However, like most common QD systems such as CdSe and PbS, those reported perovskite QDs still suffer from a certain density of trapping defects, giving rise to detrimental nonradiative recombination centers and thus quenching luminescence. In this paper, we show that a high room-temperature photoluminescence quantum yield of up to 100% can be obtained in CsPbI3 perovskite QDs, signifying the achievement of almost complete elimination of the trapping defects. This is realized with our improved synthetic protocol that involves introducing organolead compound trioctylphosphine–PbI2 (TOP–PbI2) as the reactive precursor, which also leads to a significantly improved stability for the resulting CsPbI3 QD solutions. Ultrafast kinetic analysis with time-resolved transient absorption spectroscopy evidence the negligible electron or hole-trapping pathways in our QDs, which explains such a high quantum efficiency. We expect the successful synthesis of the “ideal” perovskite QDs will exert profound influence on their applications to both QD-based light-harvesting and -emitting devices.
雑誌名	ACS Nano
巻	11
号	10
ページ	10373 - 10383
発行年	2017-10-24
出版者	American Chemical Society
ISSN	1936-0851 1936-086X
書誌レコードID	AA1240653X
DOI	info:doi/10.1021/acsnano.7b05442
権利	American Chemical Society This material is excerpted from a work that was published in ACS Nano, Copyright (c) American Chemical Society after peer review. To access the final edited and published work see https://pubs.acs.org/doi/abs/10.1021/acsnano.7b05442.
版	author
査読の有無	yes
資料タイプ	Journal Article
研究者情報	https://hyokadb02.jimu.kyutech.ac.jp/html/322_ja.html
連携ID	6670

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Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield 利用統計を見る

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Highly Luminescent Phase-Stable CsPbI3 Perovskite Quantum Dots Achieving Near 100% Absolute Photoluminescence Quantum Yield 利用統計を見る

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