Efficient and stable deep-blue narrow-spectrum electroluminescence based on hybridized local and charge-transfer (HLCT) state

被引：32
|
作者：
Xiao, Shengbing [1 ]
Zhang, Shi-Tong [1 ]
Gao, Ying [1 ]
Yang, Xinqi [1 ]
Liu, Haichao [1 ]
Li, Weijun [2 ]
Yang, Bing [1 ]
机构：
[1] Jilin Univ, Coll Chem, Inst Theoret Chem, State Key Lab Supramol Struct & Mat, Changchun, Peoples R China
[2] Zhejiang Univ Technol, Coll Chem Engn, State Key Lab Breeding Base Green Chem Synth Tech, Hangzhou 310014, Peoples R China
来源：
DYES AND PIGMENTS | 2021年 / 193卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Phenanthroimidazole-acridine derivatives; HLCT; Deep-blue OLED; LIGHT-EMITTING-DIODES; DELAYED FLUORESCENCE EMITTERS; HIGHLY EFFICIENT; EXCITED-STATE;
D O I：
10.1016/j.dyepig.2021.109482
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Two phenanthroimidazole-acridine derivatives (DPM and TDPM) were designed and synthesized for deep-blue organic light-emitting diode (OLED). Twisted combined rigid structures with hybridized local and charge-transfer (HLCT) state properties enable them to achieve excellent OLED performance. Non-doped OLEDs based on DPM and TDPM show decent deep-blue narrow-spectrum emission with Commission International de L'Eclairage (CIE) coordinates of (0.157, 0.053) and (0.158, 0.045), as well as maximum external quantum efficiency (EQE(max)) of 4.0% and 2.6%, respectively. More importantly, OLEDs based on TDPM exhibit a smaller efficiency roll-off (12%) than that of DPM (35%) at high brightness (820 cd m(-2) for DPM and 893 cd m(-2) for TDPM, respectively). Overall, our work provides a molecular design strategy of HLCT materials for efficient deep-blue OLED with high color purity using purely organic emitter.
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页数：9
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