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Cited by 647

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Lead‐Free, Air‐Stable All‐Inorganic Cesium Bismuth Halide Perovskite Nanocrystals

Yang, Bin, Chen, Junsheng, Hong, Feng, Mao, Xin, Zheng, Kaibo, Yang, Songqiu, Li, Yajuan, Pullerits, Tõnu, Deng, Weiqiao, Han, Keli·2017·Angewandte Chemie International Edition

Abstract

Lead‐based perovskite nanocrystals (NCs) have outstanding optical properties and cheap synthesis conferring them a tremendous potential in the field of optoelectronic devices. However, two critical problems are still unresolved and hindering their commercial applications: one is the fact of being lead‐based and the other is the poor stability. Lead‐free all‐inorganic perovskite Cs 3 Bi 2 X 9 (X=Cl, Br, I) NCs are synthesized with emission wavelength ranging from 400 to 560 nm synthesized by a facile room temperature reaction. The ligand‐free Cs 3 Bi 2 Br 9 NCs exhibit blue emission with photoluminescence quantum efficiency (PLQE) about 0.2 %. The PLQE can be increased to 4.5 % when extra surfactant (oleic acid) is added during the synthesis processes. This improvement stems from passivation of the fast trapping process (2–20 ps). Notably, the trap states can also be passivated under humid conditions, and the NCs exhibited high stability towards air exposure exceeding 30 days.

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Metadata

Authors
Yang, B., Chen, J., Hong, F., Mao, X., Zheng, K., Yang, S., Li, Y., Pullerits, T., Deng, W., & Han, K.
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2017-08-30
Volume
56
Issue
41
Pages
12471-12475
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2744021074
Cited by
647
References
2
FWCI
25.73
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Lead‐Free, Air‐Stable All‐Inorganic Cesium Bismuth Halide Perovskite Nanocrystals. https://app.cochat.ai/papers/10.1002/anie.201704739
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Yang, B., Chen, J., Hong, F., Mao, X., Zheng, K., Yang, S., Li, Y., Pullerits, T., Deng, W., & Han, K. (2017). Lead‐Free, Air‐Stable All‐Inorganic Cesium Bismuth Halide Perovskite Nanocrystals. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201704739

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