Gradient heterostructure perovskite single crystals enable the improvement of radiative recombination for scintillator application

Recently, organic-inorganic hybrid perovskites (OIHPs) are rising as promising candidates for light-emitting applications, due to their superior optical properties. High performance light-emitting applications such as scintillators require minimum non-radiative recombination and high fractions of ra...

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Bibliographic Details
Published in:Physical chemistry chemical physics : PCCP 2020-04, Vol.22 (13), p.697-6974
Main Authors: Shao, Wenyi, Li, Yang, Wang, Xiang, Ouyang, Xiao, Cai, Jiafa, Li, Chen, Ouyang, Xiaoping, Wu, Zhengyun, Xu, Qiang
Format: Article
Language:English
Subjects:
Carrier transport
Crystal lattices
Crystals
Diffraction patterns
Emitters
Energy gap
Heterostructures
Light emission
Optical properties
Perovskites
Photoluminescence
Radiative recombination
Scintillation counters
Single crystals
Spectral emittance
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Summary:Recently, organic-inorganic hybrid perovskites (OIHPs) are rising as promising candidates for light-emitting applications, due to their superior optical properties. High performance light-emitting applications such as scintillators require minimum non-radiative recombination and high fractions of radiative recombination. Here, we report a simple solution-processing strategy for the synthesis of funnel-type CH 3 NH 3 (MA)PbCl 3 /CH 3 NH 3 (MA)PbBr x Cl 3− x heterostructure perovskite materials that improve the light emission performances. The single crystal X-ray diffraction pattern indicates that the lattice mismatch is only ∼3.24% in the heterointerface. The halide gradient is helpful for driving the photoexcited carriers from the internal high bandgap material to the low bandgap light-emitter layer. The steady-state photoluminescence (PL) and radioluminescence (RL) spectra show that the luminescence intensity has been significantly improved by this heterostructure perovskite. Time-resolved photoluminescence (TRPL) exhibits carrier transport along the halide gradient. Our research suggests that the gradient halide perovskite heterostructure with specific optical properties could be a prospect for commercial scintillator applications. Halide funnel-typed perovskite materials have been synthesized by simply solution-processed method. This gradient heterostructure materials have been investigated that helpful for charges radiative recombination and suppress non-radiative recombination in the interfaces.
ISSN:1463-9076
1463-9084
DOI:10.1039/c9cp06259a