Efficient near-infrared organic light-emitting diodes based on a bipolar host

被引：9
作者：
Hu, Yun [1 ]
Yuan, Yi [1 ]
Shi, Ying-Li [1 ]
Lin, Jiu-Dong [1 ]
Jiang, Zuo-Quan [1 ]
Liao, Liang-Sheng [1 ,2 ]
机构：
[1] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China
[2] JITRI, Inst Organ Optoelect, Suzhou 215211, Jiangsu, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 06期
基金：
中国国家自然科学基金;
关键词：
ACTIVATED DELAYED FLUORESCENCE; PHOSPHINE OXIDE; BLUE ELECTROPHOSPHORESCENCE; ELECTROLUMINESCENT DEVICES; OLED APPLICATION; ACCEPTOR; DESIGN; ENERGY; VOLTAGE; MOIETY;
D O I：
10.1039/c7tc04843b
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The donor/acceptor (D/A) type p-conjugated molecule has superior characteristics which can be easily tuned. Herein, a D-A type host material 5-(4-(diphenylamino) phenyl) acenaphthylene-1,2-dione (ADO-TPA) was designed and synthesized with diphenylamino as the hole-transporting unit and acenaphthylene-1,2-dione as the electron-transporting unit within the molecule for the fabrication of near-infrared (NIR) organic light-emitting diodes (OLEDs). The thermal, photophysical and electrochemical properties of ADO-TPA were systematically investigated and the new host showed bipolar behavior. Significantly, the low turn on voltage of 3 V is achieved because of the narrow bandgap of ADO-TPA of about 2.14 eV. In particular, the device with 20 wt% of 3,4-bis(4-(diphenylamino) phenyl) acenaphtho[1,2-b] pyrazine-8,9-dicarbonitrile (APDC-DTPA) doped into the ADO-TPA host exhibited a maximum external quantum efficiency (EQE) of 2.7% with an emission peak of 735 nm.
引用
收藏
页码：1407 / 1412
页数：6
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