Water resistant CsPbX3 nanocrystals coated with polyhedral oligomeric silsesquioxane and their use as solid state luminophores in all-perovskite white light-emitting devices

He Huang; Bingkun Chen; Zhenguang Wang; Tak Fu Hung; Andrei S. Susha; Haizheng Zhong; Andrey L. Rogach

doi:10.1039/c6sc01758d

Author(s)

Bingkun Chen
Tak Fu Hung
Andrei S. Susha
Haizheng Zhong

Related Research Unit(s)

Centre for Functional Photonics

Detail(s)

Original language	English
Pages (from-to)	5699-5703
Journal / Publication	Chemical Science
Volume	7
Issue number	9
Publication status	Published - 13 Jun 2016

Link(s)

DOI	DOI https://doi.org/10.1039/c6sc01758d Final Published version
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Attachment(s)	Documents 6991432.pdf Final Published version, 694 KB, PDF Publisher's Copyright Statement This full text is made available under CC-BY 3.0. https://creativecommons.org/licenses/by/3.0/
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84982702039&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(638dbb3c-933f-4363-9f68-c770a1d80dfe).html

Abstract

We present an approach towards stable solid-state perovskite based luminophores with different emission colors via surface protection of CsPbX₃ (X = Br or I) with a polyhedral oligomeric silsesquioxane (POSS). This treatment results in water resistant perovskite nanocrystal powders, and prevents otherwise easy anion exchange between perovskite nanocrystals of different compositions mixed together in the solid state, which allows us to preserve their distinct emission spectra. We subsequently used mixtures of green-emitting POSS-CsPbBr₃ and red-emitting POSS-CsPb(Br/I)₃ nanocrystal powders to fabricate single layer all-perovskite down conversion white light-emitting devices.