Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes

doi:10.1038/s41467-019-09585-0

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	Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes
	M.S.Wang; J.Lin; Y.C.Hsiao; X.Y.Liu; B.Hu
	2019
发表期刊	Nature Communications
ISSN	2041-1723
卷号	10 页码:7
摘要	This paper reports our experimental studies on the underlying mechanism responsible for electroluminescence spectral narrowing phenomenon in the cavity-based organic light-emitting diodes. It is found that the microcavity generates an emerging phenomenon: a magneto-photoluminescence signal in Poly(9,9-dioctylfluorene-alt-benzothiadiazole) polymer under photoexcitation, which is completely absent when microcavity is not used. This provides an evidence that microcavity leads to the formation of spatially extended states, functioning as the intermediate states prior to the formation of Frenkel excitons in organic materials. This is confirmed by the magneto-electroluminescence solely observed from the cavity-based light-emitting diodes under electrical injection. Furthermore, the narrowed electroluminescence output shows a linear polarization, concurrently occurred with magneto-electroluminescence. This indicates that the spatially extended sates become aligned towards forming coherent light-emitting excitons within the microcavity through optical resonance. Clearly, the spatially extended states present the necessary condition to realize electroluminescence spectral narrowing phenomenon towards lasing actions in cavity-based organic light-emitting diodes.
关键词	triplet-triplet annihilation,excitons,device,Science & Technology - Other Topics
DOI	10.1038/s41467-019-09585-0
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/181722/62998
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	M.S.Wang,J.Lin,Y.C.Hsiao,et al. Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes[J]. Nature Communications,2019,10:7.
APA	M.S.Wang,J.Lin,Y.C.Hsiao,X.Y.Liu,&B.Hu.(2019).Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes.Nature Communications,10,7.
MLA	M.S.Wang,et al."Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes".Nature Communications 10(2019):7.

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