Cathodoluminescence spectral and lifetime mapping of Cs4PbBr6: fast lifetime and its scintillator application

Tetsuya Kubota; Sotatsu Yanagimoto; Hikaru Saito; Keiichirou Akiba; Ayumi Ishii; Takumi Sannomiya

doi:10.35848/1882-0786/ad1bc4

Applied Physics Express (Jan 2024)

Cathodoluminescence spectral and lifetime mapping of Cs4PbBr6: fast lifetime and its scintillator application

Tetsuya Kubota,
Sotatsu Yanagimoto,
Hikaru Saito,
Keiichirou Akiba,
Ayumi Ishii,
Takumi Sannomiya

Affiliations

Tetsuya Kubota: Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
Sotatsu Yanagimoto: Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan
Hikaru Saito: Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan; Department of Integrated Materials, Institute for Materials Chemistry and Engineering, Kyushu University , 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
Keiichirou Akiba: Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan; Takasaki Institute for Advanced Quantum Science, National Institutes for Quantum Science and Technology (QST) , 1233 Watanuki, Takasaki, Gunma, 370-1292, Japan
Ayumi Ishii: Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University , 3-4-1 Okubo, Shinjuku, Tokyo, 169-8555 Japan
Takumi Sannomiya: ORCiD; Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology , 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8503, Japan

DOI: https://doi.org/10.35848/1882-0786/ad1bc4
Journal volume & issue: Vol. 17, no. 1
p. 015005

Abstract

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Highly efficient green emission of Cs _4 PbBr _6 has been attributed to intermediate states formed by embedded CsPbBr _3 nanocrystals or defects. However, direct experimental confirmation of the presence of such nano-emitters is not straightforward and the emission mechanism remains elusive. By using cathodoluminescence (CL) imaging with a high spatial resolution, we demonstrate that CsPbBr _3 nanocrystals within the Cs _4 PbBr _6 matrix contribute to the green emission, exhibiting optical behavior distinct from the matrix. Additionally, we explore its potential as an electron beam scintillator, given its high CL intensity and exceptionally short lifetime.

Published in Applied Physics Express

ISSN: 1882-0778 (Print); 1882-0786 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1882-0786

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