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Issue 5, 2004
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Novel hole-transporting materials based on 1,4-bis(carbazolyl)benzene for organic light-emitting devices

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Abstract

Novel hole-transporting molecules containing 1,4-bis(carbazolyl)benzene as a central unit and different numbers of diphenylamine moieties as the peripheral groups have been synthesized and characterized. These compounds are thermally stable with high glass transition temperatures of 141–157 °C and exhibit chemically reversible redox processes. Their amorphous state stability and hole transport properties can be significantly improved by increasing the number of diphenylamine moieties in the outer part and by controlling the symmetry of the carbazole-based molecules. These compounds can be used as good hole-transporting materials for organic electroluminescent (EL) devices. The device performance based on tri- and tetra-substituted carbazole derivatives is comparable to that of a typical 4,4′-bis[N-(1-naphthyl)-N-phenylamino] biphenyl (NPB)-based device.

Graphical abstract: Novel hole-transporting materials based on 1,4-bis(carbazolyl)benzene for organic light-emitting devices

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Article information


Submitted
11 Aug 2003
Accepted
15 Dec 2003
First published
20 Jan 2004

J. Mater. Chem., 2004,14, 895-900
Article type
Paper

Novel hole-transporting materials based on 1,4-bis(carbazolyl)benzene for organic light-emitting devices

Q. Zhang, J. Chen, Y. Cheng, L. Wang, D. Ma, X. Jing and F. Wang, J. Mater. Chem., 2004, 14, 895
DOI: 10.1039/B309630K

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