The fatigue effects in red emissive CdSe based QLED operated around turn-on voltage

doi:10.1063/5.0145471

Residential College	false
Status	已發表Published
	The fatigue effects in red emissive CdSe based QLED operated around turn-on voltage
	Zhang, Xin 1; Bao, Hui 1; Chen, Cuili 1; Wu, Xian Gang 1; Li, Menglin 1; Ji, Wenyu 2; Wang, Shuangpeng 3; Zhong, Haizheng 1
	2023-04-07
Source Publication	Journal of Chemical Physics
ISSN	0021-9606
Volume	158 Issue:13
Abstract	The operational stability is a current bottleneck facing the quantum dot light-emitting diodes (QLEDs). In particular, the device working around turn-on voltage suffers from unbalanced charge injection and heavy power loss. Here, we investigate the operational stability of red emissive CdSe QLEDs operated at different applied voltages. Compared to the rising luminance at higher voltages, the device luminance quickly decreases when loaded around the turn-on voltage, but recovers after unloading or slight heat treatment, which is termed fatigue effects of operational QLED. The electroluminescence and photoluminescence spectra before and after a period of operation at low voltages show that the abrupt decrease in device luminance derives from the reduction of quantum yield in quantum dots. Combined with transient photoluminescence and electroluminescence measurements, as well as equivalent circuit model analysis, the electron accumulation in quantum dots mainly accounts for the observed fatigue effects of a QLED during the operation around turn-on voltage. The underlying mechanisms at the low-voltage working regime will be very helpful for the industrialization of QLED.
DOI	10.1063/5.0145471
URL	View the original
Language	英語English
Scopus ID	2-s2.0-85152022154
Fulltext Access	View Full-Text via DOI View Full-Text via Web of Science View Full-Text via Scopus
Citation statistics
Document Type	Journal article
Collection	University of Macau
Affiliation	1.MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China 2.Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun, 130012, China 3.Institute of Applied Physics and Materials Engineering, University of Macau, Taipa, Macao SAR, 999078, Macao
Recommended Citation GB/T 7714	Zhang, Xin,Bao, Hui,Chen, Cuili,et al. The fatigue effects in red emissive CdSe based QLED operated around turn-on voltage[J]. Journal of Chemical Physics, 2023, 158(13).
APA	Zhang, Xin., Bao, Hui., Chen, Cuili., Wu, Xian Gang., Li, Menglin., Ji, Wenyu., Wang, Shuangpeng., & Zhong, Haizheng (2023). The fatigue effects in red emissive CdSe based QLED operated around turn-on voltage. Journal of Chemical Physics, 158(13).
MLA	Zhang, Xin,et al."The fatigue effects in red emissive CdSe based QLED operated around turn-on voltage".Journal of Chemical Physics 158.13(2023).

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