Premium
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.