30.4: High‐Efficiency Fluorescent Red‐ and Yellow‐Emitting OLED Devices | Zendy

Spindler Jeffrey P. | Zendy; Begley William J. | Zendy; Hatwar Tukaram K. | Zendy; Kondakov Denis Y. | Zendy

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

Author(s) -

Spindler Jeffrey P.,

Begley William J.,

Hatwar Tukaram K.,

Kondakov Denis Y.

Publication year - 2009

Publication title -

sid symposium digest of technical papers

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.351

H-Index - 44

eISSN - 2168-0159

pISSN - 0097-966X

DOI - 10.1889/1.3256804

Subject(s) - oled , electroluminescence , fluorescence , optoelectronics , materials science , layer (electronics) , annihilation , electron , quantum efficiency , diode , optics , nanotechnology , physics , nuclear physics

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.

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