Solid-State Fluorescent Carbon Dots with Aggregation-Induced Yellow Emission for White Light-Emitting Diodes with High Luminous Efficiencies

doi:10.1021/acsami.9b04600

CIOMP OpenIR

	Solid-State Fluorescent Carbon Dots with Aggregation-Induced Yellow Emission for White Light-Emitting Diodes with High Luminous Efficiencies
	Y.Q.Zhang; P.Zhuo; H.Yin; Y.Fan; J.H.Zhang; X.Y.Liu; Z.Q.Chen
	2019
发表期刊	Acs Applied Materials & Interfaces
ISSN	1944-8244
卷号	11 期号:27 页码:24395-24403
摘要	For practical applications of carbon dots (CDs), a major challenge is to prevent the notorious aggregation-caused quenching (ACQ) effect.Herein, a new type of CDs (CD1) has been developed that can transform from ACQ to an enhancement of fluorescence by aggregation-induced emission (AIE).The blue fluorescence of the CDs is suppressed by ACQ, However, this is accompanied by the phenomenon of AIE at a longer wavelength, resulting in the emergence and gradual enhancement of yellow fluorescence.The obtained CD1 solid powder shows a bright yellow emission with a photoluminescence quantum yield (PLQY) of 65%.The photoluminescence (PL) spectra, absorption spectra, and time-resolved PL decay curves indicate that Forster resonant energy transfer from dispersed CD1 particles to large CD1 agglomerations leads to the enhancement of yellow fluorescence.To exploit its high PLQY and strong AIE, CD1 is applied as a color-converting layer on blue light-emitting diode (LED) chips to fabricate white LEDs (WLEDs).The obtained devices show white light coordinates of (0.29, 0.38) and (0.32, 0.42), which are close to pure white light (0.33, 0.33), and luminous efficiencies of 97.8 and 93.9 lm.W-1 and show good stability.The low cost, easy fabrication, controllability, and favorable fluorescence properties signify that CD1 of AIE will have superior performance in a variety of applications.
关键词	carbon dots (CDs),aggregation-caused quenching (ACQ),aggregation-induced emission (AIE),solid-state fluorescence,white,light-emitting diodes (WLEDs),luminous efficiency,graphene quantum dots,nitrogen-doped carbon,green route,photoluminescence,nanodots,oxide,luminescence,mechanism,sulfur,Science & Technology - Other Topics,Materials Science
DOI	10.1021/acsami.9b04600
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/181722/62768
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	Y.Q.Zhang,P.Zhuo,H.Yin,et al. Solid-State Fluorescent Carbon Dots with Aggregation-Induced Yellow Emission for White Light-Emitting Diodes with High Luminous Efficiencies[J]. Acs Applied Materials & Interfaces,2019,11(27):24395-24403.
APA	Y.Q.Zhang.,P.Zhuo.,H.Yin.,Y.Fan.,J.H.Zhang.,...&Z.Q.Chen.(2019).Solid-State Fluorescent Carbon Dots with Aggregation-Induced Yellow Emission for White Light-Emitting Diodes with High Luminous Efficiencies.Acs Applied Materials & Interfaces,11(27),24395-24403.
MLA	Y.Q.Zhang,et al."Solid-State Fluorescent Carbon Dots with Aggregation-Induced Yellow Emission for White Light-Emitting Diodes with High Luminous Efficiencies".Acs Applied Materials & Interfaces 11.27(2019):24395-24403.

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