Separation of mono-dispersed CH3NH3PbBr3 perovskite quantum dots via dissolution of nanocrystals

Kazuki Umemoto; Masaki Takeda; Yuki Tezuka; Takayuki Chiba; Matthew Schuette White; Tomoko Inose; Tsukasa Yoshida; Satoshi Asakura; Shuichi Toyouchi; Hiroshi Uji-i; Akito Masuhara

doi:10.1039/C8CE01239C

Separation of mono-dispersed CH₃NH₃PbBr₃ perovskite quantum dots via dissolution of nanocrystals†

Kazuki Umemoto,

^a Masaki Takeda,^a Yuki Tezuka,^a Takayuki Chiba,

^bc Matthew Schuette White,^d Tomoko Inose,

^e Tsukasa Yoshida,^ac Satoshi Asakura,^f Shuichi Toyouchi,^g Hiroshi Uji-i

*^eg and Akito Masuhara*^ac

Author affiliations

* Corresponding authors

^a Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
E-mail: masuhara@yz.yamagata-u.ac.jp

^b Graduate School of Organic Materials Science, Yamagata University, Yonezawa, Yamagata 992-8510, Japan

^c Research Center for Organic Electronics (ROEL), Yonezawa, Yamagata 992-8510, Japan

^d Department of Physics, University of Vermont, Burlington, VT 05405, USA

^e Research Institute for Electronic Science (RIES), Hokkaido University, N20W10, Kita-Waird Sapporo, Japan
E-mail: hiroshi.ujii@es.hokudai.ac.jp

^f ISE Chemicals Corporation, Yaesuguchi Daiei Bldg., 3-1, Kyobashi 1-Chome, Chuo-ku, Tokyo 104-0031, Japan

^g Department of Chemistry, Division of Molecular Imaging and Photonics, KU Leuven, Celestijnenlaan 200G-F, 3001 Heverlee, Belgium
E-mail: hiroshi.ujii@kuleuvne.be

Abstract

Separation of mono-dispersed CH₃NH₃PbBr₃ perovskite quantum dots (PeQDs) using the Ostwald ripening process during aging of the perovskite nanocrystals (PeNCs) in a colloidal solution is proposed for color-tunable PeQD synthesis. Monodispersed PeNCs with size ranging from 5 to 17 nm with a spherical or square shape have been successfully prepared. Photo-luminescence spectroscopy revealed the quantum confinement effect on the spherical small QDs.

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Separation of mono-dispersed CH₃NH₃PbBr₃ perovskite quantum dots via dissolution of nanocrystals†

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Separation of mono-dispersed CH₃NH₃PbBr₃ perovskite quantum dots via dissolution of nanocrystals

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