南方科技大学知识苑(SUSTech KC): Suppressing Förster Resonance Energy Transfer in Close-Packed Quantum-Dot Thin Film: Toward Efficient Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency over 21.6%

题名	Suppressing Förster Resonance Energy Transfer in Close-Packed Quantum-Dot Thin Film: Toward Efficient Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency over 21.6%
作者	Zhang，Heng; Su，Qiang; Chen，Shuming
通讯作者	Chen，Shuming
发表日期	2020
DOI	10.1002/adom.201902092
发表期刊	Advanced Optical Materials 影响因子和分区
ISSN	2195-1071
EISSN	2195-1071
卷号	8 期号:10
摘要	Colloidal II–VI quantum dots (QDs) exhibit near-unity photoluminescence (PL) quantum yield (QY) when they are dissolved in dilute solution. However, when they are assembled into thin film, the PL QY is decreased significantly due to the presence of nonradiative Förster resonance energy transfer (FRET) among the close-packed QDs. In this work, the FRET is suppressed by developing a binary-QD light emission layer (EML), where blue-QDs are introduced as spacers to spatially separate the red-QDs. Due to the separation of red-QDs, the FRET among red-QDs is effectively suppressed and thus the emission properties of red-QDs are well preserved. As a result, the PL QY of red-QD thin film is enhanced by 1.5 times. When the binary-QD EML is integrated into devices, the resultant QD light-emitting diodes (QLEDs) exhibit a high external quantum efficiency of 21.64%. The work offers a new, simple and effective approach to suppress the FRET and improve the QY of QD thin film, which may open up a new avenue for developing efficient QLEDs with near-unity internal quantum efficiency.
关键词	Förster resonance energy transfer light-emitting diodes quantum yield quantum-dot LEDs, quantum-dot thin films quenching
相关链接	[Scopus记录]
收录类别	SCI ; EI
语种	英语
学校署名	第一 ; 通讯
WOS研究方向	Materials Science ; Optics
WOS类目	Materials Science, Multidisciplinary ; Optics
WOS记录号	WOS:000536081600015
出版者	WILEY-V C H VERLAG GMBH
EI入藏号	20201108285883
EI主题词	Forster resonance energy transfer ; Quantum efficiency ; Organic light emitting diodes (OLED) ; Sols ; Energy transfer ; Nanocrystals ; Thin films ; Resonance ; Semiconductor quantum dots
EI分类号	Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Classical Physics; Quantum Theory; Relativity:931 ; Mechanics:931.1 ; Quantum Theory; Quantum Mechanics:931.4 ; Crystalline Solids:933.1
Scopus记录号	2-s2.0-85081274723
来源库	Scopus
引用统计	被引频次[WOS]：50
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/106440
专题	工学院_电子与电气工程系
作者单位	Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
第一作者单位	电子与电气工程系
通讯作者单位	电子与电气工程系
第一作者的第一单位	电子与电气工程系
推荐引用方式 GB/T 7714	Zhang，Heng,Su，Qiang,Chen，Shuming. Suppressing Förster Resonance Energy Transfer in Close-Packed Quantum-Dot Thin Film: Toward Efficient Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency over 21.6%[J]. Advanced Optical Materials,2020,8(10).
APA	Zhang，Heng,Su，Qiang,&Chen，Shuming.(2020).Suppressing Förster Resonance Energy Transfer in Close-Packed Quantum-Dot Thin Film: Toward Efficient Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency over 21.6%.Advanced Optical Materials,8(10).
MLA	Zhang，Heng,et al."Suppressing Förster Resonance Energy Transfer in Close-Packed Quantum-Dot Thin Film: Toward Efficient Quantum-Dot Light-Emitting Diodes with External Quantum Efficiency over 21.6%".Advanced Optical Materials 8.10(2020).