Crown-ether modified thermally evaporated perovskite light-emitting devices with increased operational stability

doi:10.1016/j.jlumin.2022.119317

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	Crown-ether modified thermally evaporated perovskite light-emitting devices with increased operational stability
	L. A. Zhao; Y. Zhang; K. Sun; L. Song; H. Xu; X. Y. Guo; S. Xu; Y. Q. Xia; Y. S. Hu and F. Y. Ma
	2022
发表期刊	Journal of Luminescence
ISSN	0022-2313
卷号	252 页码:8
摘要	Great progress has been made in the all-inorganic perovskite light-emitting device (PeLED) by thermal evapo-ration. However, the low operational stability of the PeLEDs by thermal evaporation is still a challenge to limit its further practical application. In this work, crown ether was introduced as the interface layer between hole transport layer (HTL) and thermally evaporated CsPbBr3 emissive layer (EML). It is found that the crown ether could not only increase the conductivity of HTL, passivate the nonradiative traps but also control the formation of the insulating Cs4PbBr6 in the EML. Consequently, the current density was evidently improved with increased brightness and current efficiency. More importantly, the working stability was also greatly prolonged due to the suppressed nonradiative defects as well as joule heating. The champion PeLED achieved a turn-on voltage of 2.9 V, a maximum brightness of 15,717 cdm-2, a current efficiency of 3.66 cdA-1, an external quantum efficiency of 1.02%. More importantly, the working lifetime T50 with initial brightness of 100 cd/m2 reached 11.8 h which has prolonged more than 30 times compared with the control devices. Our findings would shed light on revealing the factors to improve operational stability of PeLED devices.
DOI	10.1016/j.jlumin.2022.119317
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收录类别	sci ; ei
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/66498
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	L. A. Zhao,Y. Zhang,K. Sun,et al. Crown-ether modified thermally evaporated perovskite light-emitting devices with increased operational stability[J]. Journal of Luminescence,2022,252:8.
APA	L. A. Zhao.,Y. Zhang.,K. Sun.,L. Song.,H. Xu.,...&Y. S. Hu and F. Y. Ma.(2022).Crown-ether modified thermally evaporated perovskite light-emitting devices with increased operational stability.Journal of Luminescence,252,8.
MLA	L. A. Zhao,et al."Crown-ether modified thermally evaporated perovskite light-emitting devices with increased operational stability".Journal of Luminescence 252(2022):8.

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