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Highly Efficient Polymeric Electrophosphorescent Diodes
Author(s) -
Yang X.,
Müller D. C.,
Neher D.,
Meerholz K.
Publication year - 2006
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.200501867
Subject(s) - materials science , oxetane , oled , optoelectronics , diode , exciton , light emitting diode , doping , blocking (statistics) , nanotechnology , polymer chemistry , computer science , layer (electronics) , computer network , physics , quantum mechanics
Polymeric electrophosphorescent LEDs with internal quantum efficiencies approaching unity have been fabricated. Such performance levels are previously unknown for OLEDs. The key to this success is redox chemically doped oxetane‐crosslinkable hole‐transporting layers with multilayer capability (see figure). They improve hole injection and act as electron‐blocking layers, without the need to include exciton‐ or hole‐blocking layers.