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Proceedings Paper

Comparison of blue-emitting phosphorescent dopants: effect of molecular energy levels on device efficiency
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Paper Abstract

Two blue-shifted iridium phenyl-pyridine dopants are compared in identical device structures. While the dopants have very similar optical behavior, it is found that the device efficiencies are very different and dependent on the host material. Upon comparison of molecular energy levels it is proposed that the electronic properties of the dopant influence the device efficiency through an electron trapping mechanism. It is believed that the relative energetics between the host and dopant play an integral role in the operation of the device.

Paper Details

Date Published: 10 November 2004
PDF: 7 pages
Proc. SPIE 5519, Organic Light-Emitting Materials and Devices VIII, (10 November 2004); doi: 10.1117/12.564757
Show Author Affiliations
Jason J. Brooks, Universal Display Corp. (United States)
Raymond C. Kwong, Universal Display Corp. (United States)
Yeh-Jiun Tung, Universal Display Corp. (United States)
Michael S. Weaver, Universal Display Corp. (United States)
Brian W. D'Andrade, Universal Display Corp. (United States)
Vadim Adamovich, Universal Display Corp. (United States)
Mark E. Thompson, Univ. of Southern California (United States)
Stephen R. Forrest, Princeton Univ. (United States)
Julie J. Brown, Universal Display Corp. (United States)


Published in SPIE Proceedings Vol. 5519:
Organic Light-Emitting Materials and Devices VIII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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