Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride

Pei-qing CAI; Rong-yu TENG; Di ZHANG; Song WANG; Yu-xin ZHAN; Xiang-fu WANG; Jun-jie SI; Xin YAO; Qi AI; Zu-gang LIU

doi:10.37188/CJL.20210318

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Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride

Device Fabrication and Physics | 更新时间：2022-01-14

- Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 1, Pages: 94-102(2022)
- 作者机构：
  
  1.中国计量大学　光学与电子科技学院，浙江　杭州　310000
  2.南京邮电大学　电子与光学工程学院，微电子学院，江苏　南京　210023
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China(11904345;61905230;52072355;52103241);the Natural Science Foundation of Zhejiang Province(LQ19F040004)
- DOI：10.37188/CJL.20210318
  CLC：
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Pei-qing CAI, Rong-yu TENG, Di ZHANG, et al. Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride. [J]. Chinese Journal of Luminescence 43(1):94-102(2022)
DOI：

Pei-qing CAI, Rong-yu TENG, Di ZHANG, et al. Self-trapped Exciton Luminescence and Light-emitting-diodes Based on Zero-dimensional Organic-inorganic Hybrid Antimony Chloride. [J]. Chinese Journal of Luminescence 43(1):94-102(2022) DOI： 10.37188/CJL.20210318.

摘要

新兴的零维金属卤化物材料由于其优异的光电性能，近期引起了研究者们的特别关注。本文使用反溶剂法和旋涂法分别制备了零维金属卤化物四苯基膦氯化锑[(C,6,H,5,),4,P],2,SbCl,5,的发光材料和器件，通过稳态激发/发射光谱、瞬态光谱对其发光性能进行了研究。研究结果表明，在紫外光激发下，[(C,6,H,5,),4,P],2,SbCl,5,可以发出明亮的橙红光，这种橙红光源于零维限域作用下的自陷态激子三重态发光。变温光致发光(PL)和衰减寿命研究表明该物质具有600 meV左右的热激活能，抗热猝灭性能较强。通过优化器件结构，引入聚[双(4-苯基)(4-丁基苯基)胺](Poly-TPD)作为空穴传输层，通过混合Poly-TPD的荧光发射和[(C,6,H,5,),4,P],2,SbCl,5,的自陷激子发光，获得了在6 V偏压下126 cd/m,2,的暖白光电致发光器件。本工作对溶液法加工无铅金属卤化合物电致发光器件的进程具有一定的推动作用。

Abstract

The emerging of the zero-dimensional metal halide materials has attracted great attention of researchers due to their excellent photoelectric properties. Herein, the luminescent material and device based on zero-dimensional metal halide tetraphenylphosphonium antimony chloride [(C,6,H,5,),4,P] ,2,SbCl,5, were prepared by anti-solvent method and spin-coating method, respectively. The optoelectronic properties of [(C,6,H,5,),4,P] ,2,SbCl,5, were investigated by excitation spectra, emission spectra, and time-resolved spectra. The results show that [(C,6,H,5,),4,P] ,2,SbCl,5, can emit bright orange-red emission under the ultraviolet excitation. This orange-red emission originates from the triplet self-trapped exciton induced by the zero-dimensional spatial confinement. Temperature dependent PL and decay lifetime studies reveal that the material has a thermal activation energy with the value of ~600 meV, thus it has favorable anti-thermal quenching effect. By optimizing the device structure and introducing poly [bis(4-phenyl)(4-butylphenyl)amine] (Poly-TPD) as a hole transport layer, the warm white emission by mixing the fluorescence emission of Poly-TPD and the self-trapped exciton emission of [(C,6,H,5,),4,P] ,2,SbCl,5, was obtained with a brightness of 126 cd/m,2, under a bias of 6 V. This work provides an alternative approach for the development of the manufacture of lead-free metal halide electroluminescent devices by solution method.

关键词

零维发光材料自陷态激子电致发光

Keywords

zero-dimensional luminescent materialself-trapped excitonelectroluminescence

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