A direct evidence for the energy transfer from phosphorescent molecules to quantum dots in a driving light emitting diode

doi:10.1016/j.orgel.2019.06.045

CIOMP OpenIR

	A direct evidence for the energy transfer from phosphorescent molecules to quantum dots in a driving light emitting diode
	Z.Zhang; X.Guan; Z.H.Kang; H.Z.Zhang; Q.H.Zeng; R.M.Yu
	2019
发表期刊	Organic Electronics
ISSN	1566-1199
卷号	73 页码:337-341
摘要	The energy transfer (ET) processes are considered to enhance the emission in the organic/inorganic quantum dots (QDs) hybrid structures.And efficient QDs based light emitting diodes (QLEDs) have been widely reported by employing this hybrid device design.However, such ET processes have so far been only verified in the photoluminescence regime.Therefore, it is insufficient and unconvincing to elaborate the electroluminescence (EL) mechanism in the devices.Here we for the first time demonstrate the ET process between phosphorescent bis(4,6-difluorophenylpyridinato-N,C2)-picolinatoiridium (FIrpic) and QDs in a QLED under the electrical excitation regime by means of transient EL technology.The prolonged EL decay in the transient EL spectrum confirms that the FIrpic molecules with long exciton lifetime, just like an exciton reservoir, can harvest both the leaked electrons from the QDs and holes injected from hole transport layer, which then form excitons and transfer their energy to the QDs.
关键词	QLED,Energy transfer,Transient electroluminescence,Roll-off,turn-on voltage,highly efficient,thin-films,electroluminescence,singlet,layer,Materials Science,Physics
DOI	10.1016/j.orgel.2019.06.045
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/181722/62766
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	Z.Zhang,X.Guan,Z.H.Kang,et al. A direct evidence for the energy transfer from phosphorescent molecules to quantum dots in a driving light emitting diode[J]. Organic Electronics,2019,73:337-341.
APA	Z.Zhang,X.Guan,Z.H.Kang,H.Z.Zhang,Q.H.Zeng,&R.M.Yu.(2019).A direct evidence for the energy transfer from phosphorescent molecules to quantum dots in a driving light emitting diode.Organic Electronics,73,337-341.
MLA	Z.Zhang,et al."A direct evidence for the energy transfer from phosphorescent molecules to quantum dots in a driving light emitting diode".Organic Electronics 73(2019):337-341.

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