Simplified thermally activated delayed fluorescence organic light-emitting diodes

被引：2

作者：

Park, Chan Hyuk ^{[1
]}

Shim, Yong Sub ^{[1
]}

Park, Cheol Hwee ^{[1
]}

Jung, Sun-Gyu ^{[1
]}

Park, Young Wook ^{[2
]}

Ju, Byeong-Kwon ^{[1
]}

机构：

[1] Korea Univ, Sch Elect Engn, Display & Nanosyst Lab, Seoul 02841, South Korea

[2] SUN MOON Univ, Sch Mech & ICT Convergence Engn, Clumgcheongnamdo 31460, South Korea

来源：

OPTICAL MATERIALS | 2018年 / 86卷

基金：

新加坡国家研究基金会;

关键词：

Organic light-emitting diodes; Thermally activated delayed fluorescence; 4CzIPN; Simplified structure; QUANTUM EFFICIENCY; ROLL-OFF; HOST;

D O I：

10.1016/j.optmat.2018.10.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Recently, after the first demonstration of efficient, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs), these devices have been widely investigated, and several new materials (hole and electron transport materials) have been reported. In this work, we demonstrate highly efficient TADF OLEDs with a simplified structure, and systematically characterize these partially evaluated reported materials; (4s,6s)-2,4,5,6,-tetra(9H-carbazol-9-ypisophthalonitrile (4CzIPN) has been used as a TADF emissive dopant; the exciton blocking and carrier transport characteristics of 9,9'-Diphenyl-6-(9-phenyl-9H-carbazol-3-yl)-9H,9'H-3,3'-bicarbazole (Tris-PCz) and 2,7-bis(2,2'-bipyridin-5-yl)triphenylene (BPy-TP2) have been characterized and compared with those of other widely used wellknown organic materials. The demonstrated simplified TADF OLEDs with a 4CzIPN doped single emissive layer showed a high peak external quantum efficiency and power efficiency of 18.6% and 31.5 lm/W, respectively.

引用

页码：233 / 238

页数：6

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