Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 1, Pages 1721-1727Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b10186
Keywords
quasi-two-dimensional perovskite light-emitting diodes; photoluminescence quantum yield; electroluminescence; surface treatment; multiple quantum well structure
Funding
- Natural Science Foundation of China [61775011, 61735004, 61674012, 61675018]
Ask authors/readers for more resources
Quasi-two-dimensional (quasi-2D) perovskites with a multiple quantum well structure can enhance the exciton binding energy and controllable quantum confine effect, which are attractive materials for efficient perovskite light-emitting diodes (PeLEDs). However, the multiphase mixtures contained in these materials would cause nonradiative recombination at the perovskite film surface. Here, a facile solution surface treatment is adopted to improve the multiple quantum well structure of the quasi-2D perovskite emitting layer, which can reduce the influence of defectinduced nonradiative recombination and the electric-field-induced dissociation of excitons for the PeLEDs. The improved multiple quantum well structure is verified by UV absorption spectra and temperature-dependent photoluminescence spectra measurements. The photoluminescence quantum yield of the quasi-2D perovskite film with surface treatment has been approximately increased by 200%. Meanwhile, the electroluminescence device achieves a current efficiency of 45.9 cd/A.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available