Effects of acceptor on the performance of exciplex-based OLED

被引：13

作者：

Lin, Tong ^{[1
,2
]}

Song, Qiaogang ^{[1
,2
]}

Liu, Zheqin ^{[1
,2
]}

Chu, Bei ^{[1
]}

Li, Wenlian ^{[1
]}

Luo, Yongshi ^{[1
]}

Lee, C. S. ^{[3
,4
]}

Su, Zisheng ^{[1
]}

Li, Yantao ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Jilin, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

[3] City Univ Hong Kong, COSDAF, Hong Kong, Hong Kong, Peoples R China

[4] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China

来源：

SYNTHETIC METALS | 2017年 / 234卷

基金：

中国国家自然科学基金;

关键词：

TADF; OLED; Exciplex; PLQY; Charge carrier balance; ACTIVATED DELAYED-FLUORESCENCE; LIGHT-EMITTING-DIODES; HIGH-EFFICIENCY; BLUE EXCIPLEX; CONVERSION; EMISSION; EMITTERS; LAYER; ELECTROPHOSPHORESCENCE; DERIVATIVES;

D O I：

10.1016/j.synthmet.2017.10.013

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, exciplex-based OLEDs (ExOLEDs) are fabricated with 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) as the donor and a series triazine derivatives, e.g., 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine (T2T), 2,4,6-tris(3-(1H-pyrazol-1-yl)pheny1)-1,3,5-triazine (3P-T2T), and 2,4,6-tris(m-(diphenylphosphinoyl)phenyl)-1,3,5triazine (PO-T2T), as the acceptors. With different acceptors and mole ratios of donor:acceptor, the effects of the photoluminescence quantum yield (PLQY), charge carrier balance, and exciton lifetime on the EQE and efficiency roll-off are systematically investigated. It is found that the external quantum efficiency (EQE) of the ExOLEDs is primary determined by the PLQY of the mixed donor:acceptor film and tuned in a certain extent by the charge carrier balance. Furthermore, the efficiency roll-offs of different ExOLEDs are all less than 20%, which are simultaneously determined by the photoluminescence (PL) lifetime and the charge carrier balance.

引用

页码：95 / 99

页数：5

共 43 条

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