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1 January 2011 Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition
Florian Lindla, Manuel Boesing, Christoph Zimmermann, Philipp van Gemmern, Dietrich Bertram, Dietmar Keiper, Michael Heuken, Holger Kalisch, Rolf H. Jansen
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Journal of Photonics for Energy, Vol. 1, Issue 1, 011013 (January 2011). https://doi.org/10.1117/1.3545966
Abstract
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.
© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE) 1947-7988/2011/1(1)/011013/8/$25.00
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Florian Lindla, Manuel Boesing, Christoph Zimmermann, Philipp van Gemmern, Dietrich Bertram, Dietmar Keiper, Michael Heuken, Holger Kalisch, and Rolf H. Jansen "Hybrid white organic light-emitting diode with a mixed-host interlayer processed by organic vapor phase deposition," Journal of Photonics for Energy 1(1), 011013 (1 January 2011). https://doi.org/10.1117/1.3545966
Published: 1 January 2011
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Cited by 9 scholarly publications.
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KEYWORDS
Organic light emitting diodes
Excitons
Organic vapor phase deposition
Electrons
Molecules
Interfaces
External quantum efficiency
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