Ni掺杂提高紫光CsPbCl3钙钛矿纳米晶的发光热稳定性

陈肖慧; 邢珂; 曹震; 袁曦; 赵家龙

doi:10.3788/fgxb20194010.1220

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Ni掺杂提高紫光CsPbCl₃钙钛矿纳米晶的发光热稳定性

材料合成及性能 | 更新时间：2020-08-12

- Ni掺杂提高紫光CsPbCl₃钙钛矿纳米晶的发光热稳定性
- Improving Thermal Stability of Photoluminescence in Violet-emitting CsPbCl₃ Perovskite Nanocrystals Using Ni Doping
- 发光学报 2019年40卷第10期页码：1220-1227
- 作者机构：
  
  1. 东北大学理学院,辽宁沈阳,110819
  2. 吉林师范大学功能材料物理与化学教育部重点实验室,吉林四平,136000
- 作者简介：
- 基金信息：
  
  国家自然科学基金（11704152）;吉林省教育厅十三五科学技术项目（JJKH20191002KJ）资助
- DOI：10.3788/fgxb20194010.1220
  中图分类号： O482.31
- 收稿日期：2019-07-30，
  
  修回日期：2019-08-18，
  
  网络出版日期：2019-08-20，
  
  纸质出版日期：2019-10-05
- 稿件说明：
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陈肖慧, 邢珂, 曹震等. Ni掺杂提高紫光CsPbCl3钙钛矿纳米晶的发光热稳定性[J]. 发光学报, 2019,40(10): 1220-1227

CHEN Xiao-hui, XING Ke, CAO Zhen etc. Improving Thermal Stability of Photoluminescence in Violet-emitting CsPbCl3 Perovskite Nanocrystals Using Ni Doping[J]. Chinese Journal of Luminescence, 2019,40(10): 1220-1227
陈肖慧, 邢珂, 曹震等. Ni掺杂提高紫光CsPbCl3钙钛矿纳米晶的发光热稳定性[J]. 发光学报, 2019,40(10): 1220-1227 DOI： 10.3788/fgxb20194010.1220.

CHEN Xiao-hui, XING Ke, CAO Zhen etc. Improving Thermal Stability of Photoluminescence in Violet-emitting CsPbCl3 Perovskite Nanocrystals Using Ni Doping[J]. Chinese Journal of Luminescence, 2019,40(10): 1220-1227 DOI： 10.3788/fgxb20194010.1220.

摘要

为了提高紫光CsPbCl

纳米晶的发光热稳定性，研究了不同掺杂浓度的Ni离子对CsPbCl

纳米晶的结构和发光性质的影响。通过改变Ni/Pb进料量比，在190℃温度下制备出不同浓度Ni掺杂的CsPbCl

（Ni:CsPbCl

）纳米晶。发现随着Ni/Pb进料量比的增加，Ni:CsPbCl

纳米晶的405 nm发光量子效率得到了较大的提高，高达54%，但当Ni/Pb进料比超过4:1之后，Ni:CsPbCl

纳米晶的发光量子效率开始下降，这是由于氯化镍的浓度过高，影响了CsPbCl

纳米晶的成核和生长过程。还观察到，随着Ni/Pb进料比的增加，Ni:CsPbCl

纳米晶的平均尺寸逐渐减小，晶格变得更加有序。通过对不同浓度的Ni:CsPbCl

纳米晶的变温光谱测量，发现Ni离子明显地减少CsPbCl

纳米晶的发光热猝灭，有效地改善了其发光热稳定性。实验结果表明，Ni离子掺杂有效地提高了紫光CsPbCl

纳米晶的发光效率，可能归因于Ni离子掺杂减少了CsPbCl

纳米晶中的缺陷。

Abstract

In order to effectively improve the thermal stability of luminescence in violet-emitting CsPbCl

perovskite nanocrystals(NCs)

the effects of various Ni doping concentrations on their structural and luminescent properties were studied. The Ni doped CsPbCl

(Ni:CsPbCl

) NCs with various Ni doping concentrations were synthesized at 190℃ by varying the feed Ni/Pb molar ratio. It was found that the quantum yield of 405 nm photoluminescence band in Ni:CsPbCl

NCs was significantly improved up to 54% with increasing the Ni/Pb feed molar ratio while it started to drop after the molar ratio was higher than 4:1. This is because the nucleation and growth processes of the NCs were influenced in the presence of high concentration NiCl

. In addition

it was observed that the average sizes of Ni:CsPbCl

NCs were reduced with increasing Ni/Pb molar ratio. The temperature-dependent photoluminescence spectra demonstrated that the Ni doping really reduced thermal quenching of photoluminescence in Ni:CsPbCl

NCs and greatly enhanced their thermal stability. The experimental results indicated that the enhancement mechanism of luminescence in violet-emitting Ni:CsPbCl

NCs was attributed to reduction of defects in NCs with Ni doping.

关键词

Keywords

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