Synthesis and photoluminescence properties of lead-free copper-based halide Rb<sub>2</sub>CuBr<sub>3</sub>

Meng WANG; Zhuang-zhuang MA; Xu CHEN; Zhi-feng SHI

doi:10.37188/CJLCD.2020-0249

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Synthesis and photoluminescence properties of lead-free copper-based halide Rb₂CuBr₃

Perovskite Light-Emitting Materials and Devices | 更新时间：2021-02-01

- Synthesis and photoluminescence properties of lead-free copper-based halide Rb₂CuBr₃
- Chinese Journal of Liquid Crystals and Displays Vol. 36, Issue 1, Pages: 134-140(2021)
- 作者机构：
  
  郑州大学物理学院, 河南郑州 450052
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.37188/CJLCD.2020-0249
  CLC： O482.31
- Received：24 September 2020，
  
  Accepted：07 November 2020，
  
  Published：2021-01
- 稿件说明：
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Meng WANG, Zhuang-zhuang MA, Xu CHEN, et al. Synthesis and photoluminescence properties of lead-free copper-based halide Rb₂CuBr₃[J]. Chinese journal of liquid crystals and displays, 2021, 36(1): 134-140.
DOI：

Meng WANG, Zhuang-zhuang MA, Xu CHEN, et al. Synthesis and photoluminescence properties of lead-free copper-based halide Rb₂CuBr₃[J]. Chinese journal of liquid crystals and displays, 2021, 36(1): 134-140. DOI： 10.37188/CJLCD.2020-0249.

摘要

近年来，新兴的铅卤化物钙钛矿材料由于其高荧光量子产率（PLQY）、高色纯度、带隙可调等特性，在光电子器件应用方面受到了广泛的关注。然而，重金属铅的毒性严重阻碍了其大规模的生产和商业化发展。因此，开发低毒性的无铅钙钛矿材料成为该领域亟待解决的问题。本文采用高温热注入法制备了一种无铅铜基卤化物Rb

CuBr

材料，系统探究了原料中Rb

/Cu

量的比和反应时间对合成Rb

CuBr

的纯度和结晶质量的影响。透射电子显微镜显示合成的Rb

CuBr

微观特征为一维棒状形貌，这与其固有的一维晶体结构相符。此外，制备的Rb

CuBr

材料表现出明亮的紫光发射（390 nm），PLQY高达91.75%。进一步，采用温度依赖的光致发光（PL）和时间分辨的PL测试，证实了该材料较大的斯托克斯位移和宽的发射光谱来源于自限域态激子相关的辐射复合。整体来讲，这种具有高效发光特性的无铅Rb

CuBr

材料在未来的照明及显示等领域具有巨大的应用潜力。

Abstract

Recently

the newly-emerging lead-halide perovskite materials have received extensive attention in optoelectronic devices due to their high photoluminescence quantum yield (PLQY)

high color purity

and tunable bandgap

etc.

However

the toxicity of heavy metal lead seriously hinders their large-scale production and commercialization. Therefore

the development of lead-free perovskite materials with low toxicity has become an urgent research direction in this field. In this work

a lead-free copper-based Rb

CuBr

material is synthesized by hot-injection method. The effects of Rb

/Cu

molar ratio and reaction time on the purity and crystallinity of Rb

CuBr

are investigated. Transmission electron microscopy show that the microstructure of Rb

CuBr

is a one-dimensional rod-like morphology

which is consistent with their intrinsic one-dimensional crystal structure. Moreover

the as-synthesized Rb

CuBr

exhibits a bright violet emission located at 390 nm

and a high PLQY of 91.75% is obtained. Furthermore

the temperature-dependent photoluminescence (PL) and time-resolved PL decay measurements confirm that the large Stokes shift and broad emission spectra originate from the self-trapped excitons-related radiative recombination. These results indicate that the lead-free Rb

CuBr

material with high-efficiency luminescence has great application potential in lighting and display fields in the future.

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Keywords

references

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Synthesis and photoluminescence properties of lead-free copper-based halide Rb2CuBr3

DOI：10.37188/CJLCD.2020-0249

摘要

Abstract

关键词

Keywords

references

Synthesis and photoluminescence properties of lead-free copper-based halide Rb₂CuBr₃