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Proceedings Paper

White OLEDs for lighting applications
Author(s): Peter Loebl; Volker van Elsbergen; Herbert Boerner; Claudia Goldmann; Stefan Grabowski; Dietrich Bertram
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Paper Abstract

Efficient white OLEDs are becoming attractive as large area light sources for illumination and in future also for general lighting. We discuss device concepts for white OLEDs and their potential to achieve high efficacy and good lumen- and color-maintenance at the same time. We focus on OLEDs using a combination of fluorescent blue and phosphorescent red and green emitters (hybrid OLEDs). Hybrid OLEDs have high efficacy and lifetime in the white to warm white color region (color points B and A on the black-body-curve). Near illuminant A efficacy values of 28-29 lm/W without optical out-coupling can be achieved with a hybrid OLED. The external quantum efficiency (EQE) is 14%. A typical color rendering index (CRI) is 84. Recent results for monochrome OLEDs and for hybrid OLED stacks are presented.

Paper Details

Date Published: 27 August 2009
PDF: 14 pages
Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74151A (27 August 2009); doi: 10.1117/12.828574
Show Author Affiliations
Peter Loebl, Philips Technologie GmbH (Germany)
Volker van Elsbergen, Philips Technologie GmbH (Germany)
Herbert Boerner, Philips Technologie GmbH (Germany)
Claudia Goldmann, Philips Technologie GmbH (Germany)
Stefan Grabowski, Philips Technologie GmbH (Germany)
Dietrich Bertram, Philips Technologie GmbH (Germany)

Published in SPIE Proceedings Vol. 7415:
Organic Light Emitting Materials and Devices XIII
Franky So; Chihaya Adachi, Editor(s)

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