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Proceedings Paper

Phosphorescent organic light emitting devices for solid state lighting
Author(s): Brian D'Andrade; Vadim Adamovich; Richard Hewitt; Mike Hack; Julie J. Brown
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Paper Abstract

A 6"x6" white lighting panel consisting of red, green and blue colored stripes of OLEDs emits >100 lm of optical power and has a maximum energy efficacy of 30 lm/W. Each colored stripe contains 7 serially connected OLEDs having an area of 1.37 cm2, and there are 4 stripes per color, so there is a total of 84 devices. The external quantum efficiency of the red and blue OLEDs exceeds 20% and the blue OLED efficiency exceeds 5% when operated above 100 nits. Such high quantum efficiencies are achieved with an OLED architecture consisting of electrophosphorescent dopants, and at least four organic thin films layers: a hole injection layer, a hole transport layer, an emissive layer, a blocking layer, and an electron transport layer. The color coordinates of the panel can be varied between the constituent red, green, and blue color component coordinates of (0.14, 0.17), (0.31, 0.64), and (0.62, 0.38), respectively, by adjusting the intensity of each primary colors. Panel power efficiencies were measured at correlated color temperatures between 2,900 K and 5,700K, and the color rendering index was >80 in all cases because of the broad spectral output of the combined colors.

Paper Details

Date Published: 8 October 2005
PDF: 7 pages
Proc. SPIE 5937, Organic Light-Emitting Materials and Devices IX, 59370I (8 October 2005); doi: 10.1117/12.624370
Show Author Affiliations
Brian D'Andrade, Universal Display Corp. (United States)
Vadim Adamovich, Universal Display Corp. (United States)
Richard Hewitt, Universal Display Corp. (United States)
Mike Hack, Universal Display Corp. (United States)
Julie J. Brown, Universal Display Corp. (United States)

Published in SPIE Proceedings Vol. 5937:
Organic Light-Emitting Materials and Devices IX
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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