南方科技大学知识苑(SUSTech KC): Unraveling the Energy Transfer Mechanisms in Bi-Color and Tri-Color Quantum Dots: toward Efficient White Quantum Dot Light-Emitting Diodes

Title	Unraveling the Energy Transfer Mechanisms in Bi-Color and Tri-Color Quantum Dots: toward Efficient White Quantum Dot Light-Emitting Diodes
Author	Qin, Zhiyuan; Su, Qiang; Chen, Shuming
Corresponding Author	Chen, Shuming
Publication Years	2022-12-01
DOI	10.1002/adom.202202451
Source Title	Advanced Optical Materials Impact Factor & Quartile
ISSN	2195-1071
EISSN	2195-1071
Volume	11 Issue:4
Abstract	One of the considerable effects that limit the performance of white quantum dot (QD) light-emitting diodes (W-QLEDs) is the Forster resonance energy transfer (FRET) among different colored QDs. Here, the FRET mechanisms among QDs are unraveled and how FRET affects the performance of W-QLEDs is disclosed. The results show that although FRET is beneficial for harvesting the energy of nonradiative excitons, it is unhelpful for the improvement of the total emission quantum yield of bi-color or tri-color QDs. Due to the existence of FRET, a large proportion of blue QDs should be incorporated to obtain a balanced white emission, which remarkably deteriorates the efficiency of the white emission. With the developed device structure, the FRET among QDs can be suppressed, and thus, the external quantum efficiency (power efficiency) of the W-QLEDs is improved from 9.31% to 27.03% (12.18-25.52 lm W-1), representing an improvement factor of 2.9 (2.1) compared with that of the conventional W-QLEDs. The results not only deepen the insight into the FRET mechanisms among QDs but also provide solutions and inspirations for the future development of efficient W-QLEDs.
Keywords	Forster resonance energy transfer light-emitting diodes quantum dots tandem LEDs white light emission
URL	[Source Record]
Indexed By	SCI
Language	English
SUSTech Authorship	First ; Corresponding
Funding Project	[62174075] ; [JCYJ20210324105400002] ; [2020ZDZX3062]
WOS Research Area	Materials Science ; Optics
WOS Subject	Materials Science, Multidisciplinary ; Optics
WOS Accession No	WOS:000897199300001
Publisher	WILEY-V C H VERLAG GMBH
Scopus EID	2-s2.0-85144124066
Data Source	Web of Science
Citation statistics	Cited Times [WOS]:1
Document Type	Journal Article
Identifier	http://kc.sustech.edu.cn/handle/2SGJ60CL/417118
Department	Department of Electrical and Electronic Engineering
Affiliation	Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
First Author Affilication	Department of Electrical and Electronic Engineering
Corresponding Author Affilication	Department of Electrical and Electronic Engineering
First Author's First Affilication	Department of Electrical and Electronic Engineering
Recommended Citation GB/T 7714	Qin, Zhiyuan,Su, Qiang,Chen, Shuming. Unraveling the Energy Transfer Mechanisms in Bi-Color and Tri-Color Quantum Dots: toward Efficient White Quantum Dot Light-Emitting Diodes[J]. Advanced Optical Materials,2022,11(4).
APA	Qin, Zhiyuan,Su, Qiang,&Chen, Shuming.(2022).Unraveling the Energy Transfer Mechanisms in Bi-Color and Tri-Color Quantum Dots: toward Efficient White Quantum Dot Light-Emitting Diodes.Advanced Optical Materials,11(4).
MLA	Qin, Zhiyuan,et al."Unraveling the Energy Transfer Mechanisms in Bi-Color and Tri-Color Quantum Dots: toward Efficient White Quantum Dot Light-Emitting Diodes".Advanced Optical Materials 11.4(2022).

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