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Proceedings Paper

Improving the performance of PHOLEDs by using dual doping
Author(s): Vadim I. Adamovich; Michael S. Weaver; Julie J. Brown
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Paper Abstract

Phosphorescent organic light emitting device (PHOLEDTM) technology has demonstrated record high efficiencies and long operational stability. Here we report on the introduction of an additional charge transporting dopant into the device emissive layer to further improve the luminous efficiency and device lifetime. The performance enhancement is attributed to the separation of polarons and excitons in the device emissive layer, which results in reduced triplet-triplet and triplet-polaron interactions as well as minimizing self quenching and reabsorption. Specifically we report a 50% improvement in the luminous efficiency of a red PHOLED and a 3 fold improvement of the device lifetime due to the use of dual doping. A dual doped sRGB red device with 28 cd/A and the lifetime over 300,000h at 1,000 nits is demonstrated.

Paper Details

Date Published: 26 August 2008
PDF: 8 pages
Proc. SPIE 7051, Organic Light Emitting Materials and Devices XII, 70510D (26 August 2008); doi: 10.1117/12.798219
Show Author Affiliations
Vadim I. Adamovich, Universal Display Corp. (United States)
Michael S. Weaver, Universal Display Corp. (United States)
Julie J. Brown, Universal Display Corp. (United States)

Published in SPIE Proceedings Vol. 7051:
Organic Light Emitting Materials and Devices XII
Franky So; Chihaya Adachi, Editor(s)

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