Ba<sup>2+</sup>离子掺杂CsPbBr<sub>3</sub>蓝光量子点合成及其光学性能

曾凡菊; 谭永前; 胡伟; 唐孝生; 荆涛; 尹海峰

doi:10.37188/CJL.20210323

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Ba²⁺离子掺杂CsPbBr₃蓝光量子点合成及其光学性能

材料合成及性能 | 更新时间：2022-01-14

- Ba²⁺离子掺杂CsPbBr₃蓝光量子点合成及其光学性能
  增强出版
- Synthesis and Optical Properties of Barium Doped CsPbBr₃ Blue Luminescence Quantum Dots
- 发光学报 2022年43卷第1期页码：69-76
- 作者机构：
  
  1.凯里学院　大数据工程学院，贵州　凯里　556011
  2.重庆大学　光电工程学院，重庆　400044
  3.重庆邮电大学　光电学院，重庆　400065
- 作者简介：
  
  [ "曾凡菊(1986-)，女，贵州黄平县人，博士，副教授，2020年于重庆大学获得博士学位，主要从事新型光电材料与器件的研究。E-mail: zengfanju@cqu.edu.cn" ]
  [ "胡伟(1987-)，男，重庆人，博士，副教授，2015年于中山大学获得博士学位，主要从事阻变式存储器、类脑智能器件与芯片的研究。E-mail: weihu@cqu.edu.cn" ]
  [ "唐孝生(1981-)，男，四川隆昌县人，博士，教授，2013年于新加坡国立大学获得博士学位，主要从事新型光电材料与器件的研究。E-mail: xstang@cqu.edu.cn" ]
- 基金信息：
  
  贵州省科技计划(ZK [2021] 245);国家自然科学基金面上项目(61975023);凯里学院博士专项课题(BS202004;BS201301);凯里学院学术新苗培养及创新探索专项课题(黔科合平台人才[2019]01-4);贵州省教育厅创新群体重大研究项目(黔教合KY 字[2018]035)
- DOI：10.37188/CJL.20210323
  中图分类号： O482.31
- 纸质出版日期：2022-01，
  
  收稿日期：2021-10-12，
  
  修回日期：2021-10-27，
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曾凡菊, 谭永前, 胡伟, 等. Ba²⁺离子掺杂CsPbBr₃蓝光量子点合成及其光学性能[J]. 发光学报, 2022,43(1):69-76.

Fan-ju ZENG, Yong-qian TAN, Wei HU, et al. Synthesis and Optical Properties of Barium Doped CsPbBr₃ Blue Luminescence Quantum Dots[J]. Chinese Journal of Luminescence, 2022,43(1):69-76.
曾凡菊, 谭永前, 胡伟, 等. Ba²⁺离子掺杂CsPbBr₃蓝光量子点合成及其光学性能[J]. 发光学报, 2022,43(1):69-76. DOI： 10.37188/CJL.20210323.

Fan-ju ZENG, Yong-qian TAN, Wei HU, et al. Synthesis and Optical Properties of Barium Doped CsPbBr₃ Blue Luminescence Quantum Dots[J]. Chinese Journal of Luminescence, 2022,43(1):69-76. DOI： 10.37188/CJL.20210323.

摘要

近年来，全无机卤素钙钛矿CsPb

(

=Cl

I)因其荧光带宽窄、带隙可调、合成工艺简单以及荧光量子产率(Photoluminescence quantum yield

PLQY)高等优点而被应用于光电器件领域。但相比于PLQY接近于100%的红光与绿光CsPb

量子点，PLQY低于10%的蓝光量子点光学性能仍需要提高。本文通过调节前驱体BaBr

与PbBr

的量比，常温下合成了Ba

离子掺杂CsPbBr

量子点，并对合成量子点的晶体结构、形貌及其光学性能进行了研究。研究结果显示，随着Ba/Pb量比的增加，由于Ba

离子半径小于Pb

离子半径，导致合成量子点粒径由未掺杂的11.37 nm减小到Ba/Pb为1.0时的10.36 nm；此外，Ba

离子的引入拓展了带宽，吸收光谱和荧光光谱均发生蓝移，荧光光谱由未掺杂的510 nm的绿光蓝移至Ba/Pb量比为1.0 时的461 nm的蓝光。当前驱液中Ba/Pb量比为0.5时，在461 nm处具有最强的蓝光发射，PLQY为39%。研究证明适量引入BaBr

合成Ba/Pb混合金属钙钛矿量子点可有效提高其光学性能。

Abstract

In recent years

all-inorganic halide perovskite CsPb

(

=Cl

I) has attracted tremendous attention owning to its narrow emission full width at half maximum

tunable bandgap

low production cost

and high photoluminescence quantum yield (PLQY). However

the blue luminescence perovskite quantum dots(QDs) is still lag behind their red and green luminescence counterparts. Herein

the Ba

ion doped CsPbBr

QDs was obtained by adjusting the molar ratio of BaBr

and PbBr

in precursor solution. The crystal structure

morphology

and optical property of as-prepared QDs were studied. The results exhibited that the decrease of particle size and blue shift in absorption and photoluminescence spectra as the increase of the Ba/Pb molar ratio. It is mainly contributed that the ionic radius of Ba

is smaller than Pb

ion

and the bandgap of as-prepared quantum dots is enlarged by partially replacement Pb

ion with Ba

ion. The particle size is decreases from 11.37 nm(undoped) to 10.36 nm(Ba/Pb molar ratio of 1.0). The photoluminescence is blue shift from 510 nm(undoped) to 461 nm(Ba

ion doped). Most interesting

the Ba

doped CsPbBr

quantum dot with the Ba/Pb molar ratio of 0.5 demonstrated the super blue luminescence at 461 nm with PLQY of 39%. It is certified that the optical property could be effectively improved by introducing appropriate amount Ba

ion to partially replacement of Pb

ion.

关键词

Ba2+离子掺杂CsPbBr3蓝光量子点合成光学性能

Keywords

Ba2+ ion doped CsPbBr3blue luminescence quantum dotssynthesisoptical property

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Ba2+离子掺杂CsPbBr3蓝光量子点合成及其光学性能

Synthesis and Optical Properties of Barium Doped CsPbBr3 Blue Luminescence Quantum Dots

DOI：10.37188/CJL.20210323

摘要

Abstract

关键词

Keywords

references

Ba²⁺离子掺杂CsPbBr₃蓝光量子点合成及其光学性能

Synthesis and Optical Properties of Barium Doped CsPbBr₃ Blue Luminescence Quantum Dots