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

Yang, B; Chen, Junsheng LU ; Hong, Feng; Mao, Xin; Zheng, Kaibo LU ; Yang, Songqiu; Li, Yajuan; Pullerits, Tõnu LU ; Deng, Weiqiao and Han, Keli (2017) In Angewandte Chemie - International Edition 56(41). p.12471-12475
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 Cs3Bi2X9 (X=Cl, Br, I) NCs are synthesized with emission wavelength ranging from 400 to 560nm synthesized by a facile room temperature reaction. The ligand-free Cs3Bi2Br9 NCs exhibit blue emission with photoluminescence quantum efficiency (PLQE) about 0.2%. The PLQE can be increased to 4.5% when... (More)

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 Cs3Bi2X9 (X=Cl, Br, I) NCs are synthesized with emission wavelength ranging from 400 to 560nm synthesized by a facile room temperature reaction. The ligand-free Cs3Bi2Br9 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 (2-20ps). Notably, the trap states can also be passivated under humid conditions, and the NCs exhibited high stability towards air exposure exceeding 30days.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bismuth, Lead-free, Nanocrystals, Perovskites, Photoluminescence
in
Angewandte Chemie - International Edition
volume
56
issue
41
pages
12471 - 12475
publisher
John Wiley & Sons
external identifiers
  • scopus:85028703118
  • wos:000411810600006
ISSN
1433-7851
DOI
10.1002/anie.201704739
language
English
LU publication?
yes
id
bb0afe2d-fa54-4d6e-a5c2-656140f7de31
date added to LUP
2017-09-28 09:41:57
date last changed
2018-01-16 13:19:46
@article{bb0afe2d-fa54-4d6e-a5c2-656140f7de31,
  abstract     = {<p>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<sub>3</sub>Bi<sub>2</sub>X<sub>9</sub> (X=Cl, Br, I) NCs are synthesized with emission wavelength ranging from 400 to 560nm synthesized by a facile room temperature reaction. The ligand-free Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub> 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 (2-20ps). Notably, the trap states can also be passivated under humid conditions, and the NCs exhibited high stability towards air exposure exceeding 30days.</p>},
  author       = {Yang, B and Chen, Junsheng and Hong, Feng and Mao, Xin and Zheng, Kaibo and Yang, Songqiu and Li, Yajuan and Pullerits, Tõnu and Deng, Weiqiao and Han, Keli},
  issn         = {1433-7851},
  keyword      = {Bismuth,Lead-free,Nanocrystals,Perovskites,Photoluminescence},
  language     = {eng},
  number       = {41},
  pages        = {12471--12475},
  publisher    = {John Wiley & Sons},
  series       = {Angewandte Chemie - International Edition},
  title        = {Lead-Free, Air-Stable All-Inorganic Cesium Bismuth Halide Perovskite Nanocrystals},
  url          = {http://dx.doi.org/10.1002/anie.201704739},
  volume       = {56},
  year         = {2017},
}