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Enhancing effects of reduced graphene oxide on photoluminescence of CsPbBr3 perovskite quantum dots

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Abstract

The composites of CsPbBr3 perovskite quantum dots (PeQDs) and reduced graphene oxide (RGO) nanosheets have been synthesized by an in situ solution reaction. The amount of RGO can significantly affect the photoluminescence of PeQDs. By varying the amount of RGO, the photoluminescence quantum yield can be tuned from 48.4% to 69.3%. PL decay analysis indicates that the radiative decay rate and charge transfer become faster with an increase in the amount of RGO. The ellipsometric data can be described by a double Lorentz oscillator model. The comparison between bare and composite samples indicates that the complex refractive index can be affected by the RGO composite. Numerical simulations on the electric field distribution for PeQD/RGO show that the local electric field around CsPbBr3 QDs is increased by surface plasmon resonance on the surface of the RGO nanosheet. These results suggest that the PeQD/RGO composites can be used for highly efficient light emitting devices.

Graphical abstract: Enhancing effects of reduced graphene oxide on photoluminescence of CsPbBr3 perovskite quantum dots

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Supplementary files

Article information


Submitted
02 Mar 2020
Accepted
11 Apr 2020
First published
13 Apr 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Enhancing effects of reduced graphene oxide on photoluminescence of CsPbBr3 perovskite quantum dots

Y. Pu, W. Liu, Y. Liu, Q. Jiang, Y. Li, Z. Zhao, G. Yuan and Y. Zhang, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC01069C

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