Enhanced efficiency of thermally activated delayed fluorescence emitters by suitable substitution on isonicotinonitrile

被引：8

作者：

Islam, Amjad ^{[1
]}

Wang, Zhiheng ^{[2
]}

Ji, Shaomin ^{[3
]}

Usman, Khurram ^{[4
]}

Abbas, Syed Comail ^{[1
]}

Li, Jianguo ^{[1
]}

Chen, Lihui ^{[1
]}

Iqbal, Mudassir ^{[5
]}

Su, Shi-Jian ^{[2
]}

Ouyang, Xinhua ^{[1
]}

机构：

[1] Fujian Agr & Forestry Univ, Coll Mat Engn, Fuzhou 350002, Fujian, Peoples R China

[2] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[3] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510640, Guangdong, Peoples R China

[4] South China Normal Univ, Int Acad Optoelect Zhaoqing, Guangzhou, Guangdong, Peoples R China

[5] NUST, SNS, Dept Chem, Islamabad 44000, Pakistan

来源：

DYES AND PIGMENTS | 2019年 / 170卷

基金：

中国国家自然科学基金;

关键词：

Isonicotinonitrile; Emitter; Thermally activated delayed fluorescence; Organic light emitting diodes; LIGHT-EMITTING-DIODES; EXTERNAL QUANTUM EFFICIENCY; BLUE ORGANIC ELECTROPHOSPHORESCENCE; MOLECULAR DESIGN; THIOXANTHONE DERIVATIVES; POWER EFFICIENCY; ROLL-OFF; EMISSION; ACCEPTOR; TADF;

D O I：

10.1016/j.dyepig.2019.107633

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two novel thermally activated delayed fluorescence (TADF) emitters, 3,5-bis(4-(9H-carbazol-9-yl)phenyl)Isonicotinonitrile (2CzP-INN) and 3,5-bis(4-(di ([1,1'-biphenyl]-4-yl)amino)phenyl)isonicotinonitrile (2BTPA-INN), have been developed and their photophysical, electrochemical and electroluminescent properties have also been studied. Both materials possess high thermal stabilities and high photoluminescence quantum yields (PLQYs). Importantly, organic light emitting device (OLED) with 2BTPA-INN as emitter showed outstanding performance with a low driven voltage (V-ON) of 2.9 V, a high external quantum efficiency (EQE) of 26.1%, power efficiency (PE) of 93.7 lm/W and current efficiency (CE) of 83.7 cd/A, which is among the excellent performances for TADF OLEDs. The enhanced efficiency can be ascribed to the high PLQY. These results provide an optimum strategy to design efficient materials for TADF OLED devices.

引用

页数：7

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