Anthracene-bridged D-π-A fluorescent molecule featuring multiple channels for triplet exciton harvesting

被引：0

作者：

Shin, Jiwon ^{[1
]}

Lee, Hakjun ^{[2
]}

Lee, Sunhee ^{[1
]}

Lee, Jina ^{[1
]}

Nam, Heejun ^{[1
]}

Park, Bubae ^{[2
]}

Kim, Taekyung ^{[3
]}

Han, Won-Sik ^{[1
]}

机构：

[1] Seoul Womens Univ, Dept Chem, Seoul 01797, South Korea

[2] Hongik Univ, Dept Informat Display, Seoul 04066, South Korea

[3] Kyung Hee Univ, Dept Chem Engn, Yongin 17104, South Korea

来源：

DYES AND PIGMENTS | 2025年 / 240卷

关键词：

LIGHT-EMITTING-DIODES; EFFICIENCY ROLL-OFF; HIGHLY EFFICIENT; ORGANIC MATERIALS; OLEDS; EMISSION; ELECTROLUMINESCENCE; PENTACENE; EMITTERS; PROGRESS;

D O I：

10.1016/j.dyepig.2025.112821

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Recent research has garnered significant attention for exploring highly efficient organic light-emitting diode (OLED) devices that utilize excitons generated in the triplet excited state. In this study, AML23-1 and AML23-2 were successfully synthesized by altering the number of fluorene units used as electron donors in the anthracene-phenanthroimidazole derivative. Detailed photophysical investigations, along with DFT analysis, suggest hybridized local and charge transfer (HLCT) characteristics for both materials. The incorporation of D-pi-A pairs promoted a unique electronic distribution, effectively narrowing the energy gap between the S1 and Tn (n = 2 or 3) states. Additionally, the stable T1 level of anthracene facilitated the transition to triplet-triplet fusion (TTF), enabling the recycling of dark triplet excitons. Finally, five non-doped devices using AML23-1 were fabricated with varying charge balances. The optimized device exhibited a maximum external quantum efficiency (EQE) of 4.84 % with low efficiency roll-off and Commission Internationale de l'E<acute accent>clairage (CIE) coordinates of (0.157, 0.296).

引用

页数：12

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