Simone Hofmann, Mauro Furno, Björn Lüssem, Karl Leo and Malte C. Gather Investigation of triplet harvesting and outcoupling efficiency in highly efficient two-color hybrid white organic light-emitting diodes physica status solidi (a) 210
Singlet and triplet transfer processes are studied in white triplet harvesting organic light-emitting diodes, comprising fluorescent and phosphorescent emitter molecules. The CIE coordinates of these devices can be adjusted over a wide range by varying the distance between exciton generation and triplet harvesting zone. Optical modeling of the electromagnetic field and a comparison to the position of the emitters confirms that the devices operate close to the optical optimum.
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