Details

Autor(en) / Beteiligte

• Kondakova, Marina E.
• Giesen, David J.
• Deaton, Joseph C.
• Liao, Liang-Sheng
• Pawlik, Thomas D.
• Kondakov, Denis Y.
• Miller, Michael E.
• Royster, Tommie L.
• Comfort, Dustin L.

Titel

17.3: Highly Efficient Fluorescent/Phosphorescent OLED Devices Using Triplet Harvesting

Ist Teil von

• SID International Symposium Digest of technical papers, 2008-05, Vol.39 (1), p.219-222

Ort / Verlag

Oxford, UK: Blackwell Publishing Ltd

Erscheinungsjahr

2008

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• We demonstrate efficient white and non‐white hybrid OLED devices operating by a triplet harvesting mechanism to create light. Triplet excited states are generated in a blue fluorescent light‐emitting layer (LEL) and utilized upon their diffusion to the phosphorescent LEL(s). At 1000 cd/m2 a blue/yellow hybrid OLED device shows external quantum efficiency (EQE) of 13.6%, 3.8 V, 30.1 lm/W, and excellent color characteristics suitable for display application. Performance of non‐white‐emitting hybrids, RGB white, and a tandem hybrid device is discussed. The triplet harvesting mechanism in all hybrid devices was verified by several experimental methods (spectral analysis, time‐resolved electroluminescence (EL), magnetic field effect on EL).