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Proceedings Paper

Novel triplet host materials with high-energy gap and thermal stability for organic electrophosphorescent devices
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Paper Abstract

Organic electrophosphorescent materials and devices are the prime focus of organic light-emitting diodes research due to their high external quantum efficiency and power efficiency. The host materials with both high triplet energy level and high thermal stability are especially formidable for blue phosphorescent emitters. Herewith we report a novel triplet host material based on fluorene, 9,9-bis(4'-carbazol-phenyl)fluorene (CPF), in which two phenyl-carbazole moieties are connected to C9 carbon of the fluorene. This compound possesses not only desirably high triplet (2.9 eV) energies, but also extremely high glass transition temperature (Tg = 165 °C) and thermal stability. By using CPF as the host material, blue-emitting phosphorescent devices exhibited much higher efficiency and longer lifetime than those with CBP host.

Paper Details

Date Published: 20 April 2006
PDF: 9 pages
Proc. SPIE 6192, Organic Optoelectronics and Photonics II, 61920T (20 April 2006); doi: 10.1117/12.666915
Show Author Affiliations
Juan Qiao, Tsinghua Univ. (China)
Li D Wang, Tsinghua Univ. (China)
Yong Qiu, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 6192:
Organic Optoelectronics and Photonics II
Paul L. Heremans; Michele Muccini; Eric A. Meulenkamp, Editor(s)

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