In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 10, No. 2 ( 2022), p. 762-767
Abstract:
The special luminescence properties of cesium lead halide perovskite make it an ideal material for efficient and low-cost light-emitting devices. However, the green emission observed in Cs 4 PbBr 6 nanocrystals is still controversial, particularly whether it originates from the inherent point defects or only the CsPbBr 3 impurities. In this work, Cs 4 PbBr 6 quantum dot glass was synthesized and the mechanism of the green emission in Cs 4 PbBr 6 was systematically studied. The results show that the green emission of Cs 4 PbBr 6 comes from the Br vacancies, and the water-induced hydration layer PbBr(OH) resulted in an enhancement of the green emission. The PLQYs of the quantum dot glass were increased 28 times with the assistance of water. This work provides evidence for the defect-induced green emission of Cs 4 PbBr 6 , which has significant value to related work and helps to extend the application range of zero-dimensional perovskite materials in optoelectronic devices.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702245-6
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