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39.2: Efficient Single‐Layer Small Molecule Blue OLEDs Based on a Multifunctional Bi polar Transport Material
Author(s) -
Ho MengHuan,
Liu MengYu,
Lin KuanHeng,
Chen Chin H.,
Tang Ching W.
Publication year - 2010
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 - 10.1889/1.3500525
Subject(s) - electroluminescence , dopant , oled , optoelectronics , materials science , quantum efficiency , layer (electronics) , diode , anthracene , electron mobility , polar , doping , nanotechnology , chemistry , photochemistry , physics , astronomy
An efficient blue organic light emitting diode with a simplified single‐layer structure by employing the multi‐functional 2‐methyl‐ 9,10‐di(2‐naphthyl)anthracene (MADN) has been developed. By taking advantage of its large bandgap and bipolarity, we demonstrate that MADN can be used as a common material for hole‐transport, host of emitting, electron‐transport layers, and a host for p‐type and n‐type dopants in the same device. The single‐ layer blue OLED achieved an electroluminescence efficiency of 8.5 cd/A with corresponding CIE x,y of (0.16, 0.25) at 20 mA/cm 2 and an external quantum efficiency of 4.9%.