30.4: High-Efficiency Fluorescent Red- and Yellow-Emitting OLED Devices

30.4: High-Efficiency Fluorescent Red- and Yellow-Emitting OLED Devices

We report high‐efficiency fluorescent red OLEDs with 11.5% EQE (15 cd/A) at 3 V, and yellow OLEDs with 8.6% EQE (28 cd/A) at 2.9 V. This performance was obtained using a nonemitting assist layer adjacent to the emission layer, and low‐voltage electron‐transporting and electron‐injecting layers. Time...

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Veröffentlicht in:SID International Symposium Digest of technical papers 2009-06, Vol.40 (1), p.420-423
Hauptverfasser: Spindler, Jeffrey P., Begley, William J., Hatwar, Tukaram K., Kondakov, Denis Y.
Format: Artikel
Sprache:eng
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Zusammenfassung:We report high‐efficiency fluorescent red OLEDs with 11.5% EQE (15 cd/A) at 3 V, and yellow OLEDs with 8.6% EQE (28 cd/A) at 2.9 V. This performance was obtained using a nonemitting assist layer adjacent to the emission layer, and low‐voltage electron‐transporting and electron‐injecting layers. Time‐resolved electroluminescence measurements indicate a significant efficiency contribution (up to 50%) from triplet—triplet annihilation processes.
ISSN:0097-966X
2168-0159
DOI:10.1889/1.3256804