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无铅铜基卤化物Rb2CuBr3的合成与发光特性
Synthesis and photoluminescence properties of lead-free copper-based halide Rb2CuBr3
- 液晶与显示 2021年36卷第1期 页码：134-140
- 作者机构：
郑州大学 物理学院, 河南 郑州 450052
- 作者简介：
[ "王猛(1997-), 男, 河南新乡人, 硕士研究生, 2019年于河南师范大学获得学士学位, 主要从事无铅卤化物钙钛矿材料的合成及物性研究。E-mail:1840524471@qq.com" ]
[ "史志锋(1987-), 男, 河南商丘人, 博士, 副教授, 2015年于吉林大学获得博士学位, 主要从事半导体光电材料的合成、光物理及其在光电器件中的应用研究。E-mail:shizf@zzu.edu.cn" ]
- 基金信息：国家自然科学基金(11774318)
DOI：10.37188/CJLCD.2020-0249
中图分类号： O482.31收稿日期：2020-09-24，
录用日期：2020-11-7，
纸质出版日期：2021-01
- 稿件说明：
移动端阅览
王猛, 马壮壮, 陈旭, 等. 无铅铜基卤化物Rb2CuBr3的合成与发光特性[J]. 液晶与显示, 2021,36(1):134-140.
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.
王猛, 马壮壮, 陈旭, 等. 无铅铜基卤化物Rb2CuBr3的合成与发光特性[J]. 液晶与显示, 2021,36(1):134-140. DOI： 10.37188/CJLCD.2020-0249.
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
2
CuBr
3
材料，系统探究了原料中Rb
+
/Cu
+
量的比和反应时间对合成Rb
2
CuBr
3
的纯度和结晶质量的影响。透射电子显微镜显示合成的Rb
2
CuBr
3
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
2
CuBr
3
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
2
CuBr
3
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
2
CuBr
3
material is synthesized by hot-injection method. The effects of Rb
+
/Cu
+
molar ratio and reaction time on the purity and crystallinity of Rb
2
CuBr
3
are investigated. Transmission electron microscopy show that the microstructure of Rb
2
CuBr
3
is a one-dimensional rod-like morphology
which is consistent with their intrinsic one-dimensional crystal structure. Moreover
the as-synthesized Rb
2
CuBr
3
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
2
CuBr
3
material with high-efficiency luminescence has great application potential in lighting and display fields in the future.
关键词
Keywords
references
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