White OLEDs for lighting applications

Peter Loebl; Volker van Elsbergen; Herbert Boerner; Claudia Goldmann; Stefan Grabowski; Dietrich Bertram

doi:10.1117/12.828574

27 August 2009 White OLEDs for lighting applications

Peter Loebl, Volker van Elsbergen, Herbert Boerner, Claudia Goldmann, Stefan Grabowski, Dietrich Bertram

Proceedings Volume 7415, Organic Light Emitting Materials and Devices XIII; 74151A (2009) https://doi.org/10.1117/12.828574
Event: SPIE Photonic Devices + Applications, 2009, San Diego, California, United States

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.

Citation Download Citation

Peter Loebl, Volker van Elsbergen, Herbert Boerner, Claudia Goldmann, Stefan Grabowski, and Dietrich Bertram "White OLEDs for lighting applications", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74151A (27 August 2009); https://doi.org/10.1117/12.828574

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