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Organic light‐emitting devices having chemically‐doped arylamine oligomer as a hole injection layer
Author(s) -
Ito Takayuki,
Asaka Jiro,
Dao Kinh Luan Thanh,
Kido Junji
Publication year - 2005
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.609
Subject(s) - oligomer , materials science , oled , doping , layer (electronics) , indium tin oxide , lewis acids and bases , spin coating , polymer chemistry , chemical engineering , coating , optoelectronics , organic chemistry , nanotechnology , chemistry , engineering , catalysis
A soluble and thermally stable arylamine oligomer containing difluorenyl groups was prepared and applied to organic light‐emitting devices (OLEDs) as a hole injection layer. The oligomer layer was doped with a Lewis acid and formed by spin coating from the dichloroethane solution. The OLED with a structure of indium tin oxide (ITO)/Lewis‐acid‐doped arylamine oligomer/ N , N ′‐dinaphthyl‐ N , N ′‐diphenyl bendizine ( α ‐NPD)/tris(8‐quinolinolato)aluminum(III) (Alq 3 )/LiF/Al showed lower drive voltages and higher power efficiencies, compared with the devices without the hole injection oligomer layer. Copyright © 2005 John Wiley & Sons, Ltd.