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Charge transport polymers for organic electroluminescent devices
Author(s) -
Kido Junji,
Hongawa Kenichi,
Nagai Katsutoshi,
Okuyama Katsuro
Publication year - 1994
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19940840112
Subject(s) - electroluminescence , materials science , optoelectronics , layer (electronics) , fluorescence , substrate (aquarium) , luminance , doping , charge carrier , polymer , optics , nanotechnology , oceanography , geology , composite material , physics
Triple‐layer‐type organic electroluminescent devices were fabricated using charge‐transporting poly( N ‐vinylcarbazole) (PVK) as a hole‐transporting emitter layer. Electron‐transporting layers consisting of a triazole derivative (TAZ) and an aluminum complex (Alq) layer were used to maximize the carrier recombination efficiency. The EL device with a structure of glass substrate/indium‐tinoxide/PVK/TAZ/AIq/Mg:Ag showed bright blue emission from the PVK layer with a luminance of over 700 cd/m 2 . The emission color was tuned to a desirable color in the visible region through doping the PVK layer with fluorescent dyes. Bright white emission, in particular, was obtained for the first time at a high luminance level of over 3000 cd/m 2 by using three kinds of fluorescent dyes each emitting red, green or blue.