Highly effective organic light-emitting diodes containing thermally activated delayed fluorescence emitters with horizontal molecular orientation

被引：8

作者：

Lee, Chan Hee ^{[1
]}

Choi, Shin Hyung ^{[1
]}

Oh, Sung Joon ^{[1
]}

Lee, Jun Hyeon ^{[1
]}

Shim, Jae Won ^{[2
]}

Adachi, Chihaya ^{[3
,4
]}

Lee, Sae Youn ^{[1
]}

机构：

[1] Dongguk Univ, Dept Energy & Mat Engn, Seoul 04620, South Korea

[2] Korea Univ, Sch Elect Engn, Seoul 02841, South Korea

[3] Kyushu Univ, Ctr Organ Photon & Elect Res OPERA, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

[4] Kyushu Univ, Dept Chem & Biochem, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan

来源：

RSC ADVANCES | 2020年 / 10卷 / 70期

基金：

日本科学技术振兴机构;

关键词：

EXTERNAL QUANTUM EFFICIENCY; TRIPLET EXCITONS; BLUE; DESIGN; COMPLEXES; EMISSION; DIPOLES; SINGLET;

D O I：

10.1039/d0ra07865d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, we report new thermally activated delayed fluorescence (TADF) emitters, AcPYM (10,10 '-(pyrimidine-2,5-diylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine)) and PxPYM (10,10 '-(pyrimidine-2,5-diylbis(4,1-phenylene))bis(10H-phenoxazine)), by employing donor units at the 2,5-positions of the pyrimidine acceptor unit. The donor-acceptor-donor (D-A-D) units combined in the linear molecular structure of AcPYM or PxPYM enhanced the horizontally oriented alignment, and the horizontal transition dipole moments were realized by up to 87% in the host matrix. Organic light-emitting diodes (OLEDs) containing AcPYM and PxPYM emitters realized external quantum efficiencies (eta(ext)) of 16.8% for blue and green emissions.

引用

页码：42897 / 42902

页数：6

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