UM  > INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliated with RCfalse
Status已發表Published
Stable and Efficient Blue‐Emitting CsPbBr3 Nanoplatelets with Potassium Bromide Surface Passivation
Lin, H.; Wei, Q.; Ng, K. W.; Dong, J.Y.; Li, J.L.; Liu, W.W; Yan, S.S.; Chen, S.; Xing, G.C.; Tang, X.S.; Tang, Z.K.; Wang, S.P.
2021-06-13
Source PublicationSmall
ISSN1613-6810 (print) 1613-6829 (web)
Pages1-10
Abstract

Colloidal all-inorganic perovskites nanocrystals (NCs) have emerged as a promising material for display and lighting due to their excellent optical properties. However, blue emissive NCs usually suffer from low photoluminescence quantum yields (PLQYs) and poor stability, rendering them the bottleneck for full-color all-perovskite optoelectronic applications. Herein, a facile approach is reported to enhance the emission efficiency and stability of blue emissive perovskite nano-structures via surface passivation with potassium bromide. By adding potassium oleate and excess PbBr2 to the perovskite precursor solutions, potassium bromide-passivated (KBr-passivated) blue-emitting (≈450 nm) CsPbBr3 nanoplatelets (NPLs) is successfully synthesized with a respectably high PLQY of 87%. In sharp contrast to most reported perovskite NPLs, no shifting in emission wavelength is observed in these passivated NPLs even after prolonged exposures to intense irradiation and elevated temperature, clearly revealing their excellent photo- and thermal-stabilities. The enhancements are attributed to the formation of K-Br bonding on the surface which suppresses ion migration and formation of Br-vacancies, thus improving both the PL emission and stability of CsPbBr3 NPLs. Furthermore, all-perovskite white light-emitting diodes (WLEDs) are successfully constructed, suggesting that the proposed KBr-passivated strategy can promote the development of the perovskite family for a wider range of optoelectronic applications.

KeywordMetal-halide Perovskite Stability Nanoplatelets Surface Passivation
Language英語English
The Source to ArticlePB_Publication
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding AuthorXing, G.C.; Tang, Z.K.; Wang, S.P.
Recommended Citation
GB/T 7714
Lin, H.,Wei, Q.,Ng, K. W.,et al. Stable and Efficient Blue‐Emitting CsPbBr3 Nanoplatelets with Potassium Bromide Surface Passivation[J]. Small,2021:1-10.
APA Lin, H.,Wei, Q.,Ng, K. W.,Dong, J.Y.,Li, J.L.,Liu, W.W,Yan, S.S.,Chen, S.,Xing, G.C.,Tang, X.S.,Tang, Z.K.,&Wang, S.P..(2021).Stable and Efficient Blue‐Emitting CsPbBr3 Nanoplatelets with Potassium Bromide Surface Passivation.Small,1-10.
MLA Lin, H.,et al."Stable and Efficient Blue‐Emitting CsPbBr3 Nanoplatelets with Potassium Bromide Surface Passivation".Small (2021):1-10.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lin, H.]'s Articles
[Wei, Q.]'s Articles
[Ng, K. W.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lin, H.]'s Articles
[Wei, Q.]'s Articles
[Ng, K. W.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lin, H.]'s Articles
[Wei, Q.]'s Articles
[Ng, K. W.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.