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High‐Efficiency Solution‐Processed Small Molecule Electrophosphorescent Organic Light‐Emitting Diodes
Author(s) -
Cai Min,
Xiao Teng,
Hellerich Emily,
Chen Ying,
Shinar Ruth,
Shinar Joseph
Publication year - 2011
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201101154
Subject(s) - materials science , oled , optoelectronics , layer (electronics) , biphenyl , cathode , microlens , diode , doping , molecule , light emitting diode , electroluminescence , small molecule , optics , nanotechnology , organic chemistry , chemistry , physics , lens (geology) , biochemistry
Spin‐coated small‐molecule organic light‐emitting diodes (OLEDs) based on green‐emitting Ir(mppy) 3 ‐doped 4,4'‐bis(9‐carbazolyl)‐biphenyl (CBP) blended with electron‐ and hole‐transporting molecules are demonstrated to have very high efficiencies (up to 60 lm/W and 69 Cd/A without any outcoupling enhancement, which can double with a high‐quality microlens array). An additional electron‐transporting/hole‐blocking BPhen layer is thermally evaporated on the active layer, followed by the LiF/Al cathode.