Synthesis and Optical Properties of Barium Doped CsPbBr<sub>3</sub> Blue Luminescence Quantum Dots

Fan-ju ZENG; Yong-qian TAN; Wei HU; Xiao-sheng TANG; Tao JING; Hai-feng YIN

doi:10.37188/CJL.20210323

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

Synthesis and Properties of Materials | 更新时间：2022-01-14

- Synthesis and Optical Properties of Barium Doped CsPbBr₃ Blue Luminescence Quantum Dots
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 1, Pages: 69-76(2022)
- 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：
- 基金信息：
  
  Science and Technology Foundation of Guizhou Province(ZK [2021] 245);National Natural Science Foundation of China(61975023);Special doctoral project of Kaili University(BS202004;BS201301);Academic Cultivation and Innovation Exploration Project of Kaili University(黔科合平台人才[2019]01-4);Major Research Projects of Innovative Groups in Education Department of Guizhou Province(黔教合KY 字[2018]035)
- DOI：10.37188/CJL.20210323
  CLC：
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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 43(1):69-76(2022)
DOI：

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 43(1):69-76(2022) DOI： 10.37188/CJL.20210323.

摘要

近年来，全无机卤素钙钛矿CsPb,X,3,(,X,=Cl,Br,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,X,3,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,2,与PbBr,2,的量比，常温下合成了Ba,2+,离子掺杂CsPbBr,3,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,2+,离子半径小于Pb,2+,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,2+,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,2,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,X,3,(,X,=Cl, Br, 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,2+, ion doped CsPbBr,3, QDs was obtained by adjusting the molar ratio of BaBr,2, and PbBr,2, 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,2+, is smaller than Pb,2+, ion, and the bandgap of as-prepared quantum dots is enlarged by partially replacement Pb,2+, ion with Ba,2+, 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,2+, ion doped). Most interesting, the Ba,2+, doped CsPbBr,3, 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,2+, ion to partially replacement of Pb,2+, 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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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

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