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

Patra, Amitava ; Pan, Michael ; Friend, Christopher S. ; Lin, Tzu-Chau ; Cartwright, Alexander N. ; Prasad, Paras. N. ; Burzynski, Ryszard (2002) Electroluminescence properties of systematically derivatized organic chromophores containing electron donor and acceptor groups Chemistry of Materials, 14 (10). pp. 4044-4048. ISSN 0897-4756

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Official URL: http://pubs.acs.org/doi/abs/10.1021/cm020075x?jour...

Related URL: http://dx.doi.org/10.1021/cm020075x

Abstract

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.

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ID Code:104869
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