2020年5月
Effect of A-Site Cation on Photoluminescence Spectra of Single Lead Bromide Perovskite Nanocrystals
NANO LETTERS
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- 巻
- 20
- 号
- 5
- 開始ページ
- 4022
- 終了ページ
- 4028
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.nanolett.0c01417
- 出版者・発行元
- AMER CHEMICAL SOC
Lead halide perovskite (APbX(3)) nanocrystals exhibit photoluminescence (PL) with both wide wavelength tunability and high quantum efficiency. While the Pb-X-6 octahedra mainly determines the near-band-edge optical properties and the A-site cation affects the structural stability, the role of the A-site cation in determining the optical properties is still unclear. Here, we report the PL properties of three types of lead bromide perovskite APbBr(3) nanocrystals with different cations [A = HC(NH2)(2)(+), CH3NH3+, and Cs+], as revealed by single-dot spectroscopy, and discuss the influence of the A-site cation on the PL spectrum. The nanocrystal size dependences of the PL energy and lifetime show no large variation with the species of the A-site cation. We find that the size of the A-site cation determines the coupling strength between electrons and longitudinal-optical phonons in the nanocrystal and thus affects the PL spectral shape, especially the low-energy tail.
- リンク情報
- ID情報
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- DOI : 10.1021/acs.nanolett.0c01417
- ISSN : 1530-6984
- eISSN : 1530-6992
- PubMed ID : 32330045
- Web of Science ID : WOS:000535255300141