Special Section on Organic Light-Emitting Materials and Devices

Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition

[+] Author Affiliations
Florian Lindla, Manuel Boesing, Christoph Zimmermann, Holger Kalisch, Rolf H. Jansen

RWTH Aachen University, Chair of Electromagnetic Theory, Kackertstraße 15-17, 52072 Aachen, Germany

Philipp van Gemmern, Dietrich Bertram

Philips Technologie GmbH, Philipsstraße 8, 52016 Aachen, Germany

Dietmar Keiper

AIXTRON AG, Kaiserstraße 98, 52134 Herzogenrath, Germany

Michael Heuken

RWTH Aachen University, Chair of Electromagnetic Theory, Kackertstraße 15-17, 52072 Aachen, Germany

AIXTRON AG, Kaiserstraße 98, 52134 Herzogenrath, Germany

J. Photon. Energy. 1(1), 011013 (February 07, 2011). doi:10.1117/1.3545966
History: Received June 28, 2010; Revised November 18, 2010; Accepted January 04, 2011; Published February 07, 2011
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Organic light-emitting diodes (OLEDs) are a key technology in solid state lighting. Without a long-lived phosphorescent blue emitter, a hybrid concept based on phosphorescent red and green emitters and a fluorescent blue emitter in a white OLED stack is a promising approach for pure-white emission. Several challenges such as exciton recombination on all emitters and triplet diffusion, as well as quenching, have to be overcome. To address these issues, a mixed-host phosphorescent emission layer is employed. The mixture ratio is locally varied in the emission layer. An interlayer separates the phosphorescent and fluorescent emission layer. Strategies to tune the color coordinates are presented. The lifetime and color stability versus luminance are investigated. At Commission Internationale de I’Eclairage color coordinates of 0.44/0.44, a current efficacy of 28.0 cd/A (at 1000 cd/m2), and a luminous efficacy of 20.6 lm/W can be measured.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Florian Lindla ; Manuel Boesing ; Christoph Zimmermann ; Philipp van Gemmern ; Dietrich Bertram, et al.
"Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition", J. Photon. Energy. 1(1), 011013 (February 07, 2011). ; http://dx.doi.org/10.1117/1.3545966


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