Photo- and electroluminescent properties of V-shaped fused-biscoumarins containing tert-butyl group modified imidazole/carbazole groups

IF 2.7 4区工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Organic Electronics Pub Date : 2025-02-04 DOI:10.1016/j.orgel.2025.107208

Rongjing Liu , Tianzhi Yu , Ruige Su , Yuling Zhao , Di Zhang , Shuomei Zhang , Wenming Su

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Abstract

The unique molecular structure of fused-biscoumarins endows them with intriguing photophysical properties, making some of them excellent fluorophores. However, their poor solubility limits their application in the solution-processable organic light-emitting diodes (OLEDs). In this work, to improve the solubility of the fused-biscoumarins for the solution-processable OLEDs, two new V-shaped fused-biscoumarins containing tert-butyl group modified imidazole/carbazole groups, VBC-IM and VBC-BuCz, were successfully synthesized and characterized. Both compounds exhibit intense green emission in dichloromethane solution and good thermal stability. In the absence of the hole-transporting layers, the doped devices using the solution-processed emitting layers of CBP:VBC-IM or VBC-BuCz emit green emission with the maximum external quantum efficiency (EQE_max) of 1.63 % and 1.82 %, and the maximum luminance (L_max) of 2059 cd/m² and 2796 cd/m², respectively.

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来源期刊

Organic Electronics 工程技术-材料科学：综合

CiteScore

6.60

自引率

6.20%

发文量

238

审稿时长

44 days

期刊介绍： Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc. Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.