Water Resistant CsPbX Nanocrystals Coated with Polyhedral Oligomeric Silsesquioxane and Their Use As Solid State Luminophores in All-perovskite White Light-emitting Devices

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2018 Jul 24

PMID 30034709

Citations 61

Authors

He Huang

Bingkun Chen

Zhenguang Wang

Tak Fu Hung

Andrei S Susha

Haizheng Zhong

Andrey L Rogach

Affiliations

Soon will be listed here.

Abstract

We present an approach towards stable solid-state perovskite based luminophores with different emission colors surface protection of CsPbX (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-CsPbBr and red-emitting POSS-CsPb(Br/I) nanocrystal powders to fabricate single layer all-perovskite down conversion white light-emitting devices.

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