Electroluminescence properties of systematically derivatized organic chromophores containing electron donor and acceptor groups

Amitava Patra, Michael Pan, Christopher S. Friend, Tzu Chau Lin, Alexander N. Cartwright, Paras N. Prasad, Ryszard Burzynski

研究成果: 雜誌貢獻期刊論文同行評審

49 引文 斯高帕斯(Scopus)

摘要

We present electroluminescent (EL) properties of new blue-green organic dyes. The molecular structures of these dyes are based on 2,7-divinyl-9,9-bis(tert-butyl)fluorene, a π-electron bridge, end-capped with electron donor (D) and/or electron acceptor (A) group(s) to form D-π-A, D-π-D, and A-π-A structures. The donor group is a triphenylamine, and the acceptor group is a diphenyloxadiazole. We studied EL properties of these dyes in a single-layer EL device having the following structure: ITO/PVK:DYE/Ca/Al. We found that both the wavelength of maximum emission and the threshold of EL depend on the structure and the concentration of the dye. Among the structure reported here, the D-π-A dye shows the highest EL performance, exhibiting a brightness of 498 cd/m2 at an applied voltage of 25 V.

原文???core.languages.en_GB???
頁(從 - 到)4044-4048
頁數5
期刊Chemistry of Materials
14
發行號10
DOIs
出版狀態已出版 - 1 10月 2002

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