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Photopatterning of Crosslinkable Hole‐Conducting Materials for Application in Organic Light‐Emitting Devices
Author(s) -
Bacher Erwin,
Jungermann Steffen,
Rojahn Markus,
Wiederhirn Valérie,
Nuyken Oskar
Publication year - 2004
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400107
Subject(s) - oxetane , photoinitiator , materials science , oled , polymer , polymer chemistry , chemical engineering , photolithography , layer (electronics) , nanotechnology , composite material , monomer , engineering
Summary: Modern multilayer organic light‐emitting devices (OLED) are fabricated easily and at low cost by spin‐coating with subsequent crosslinking of the layers. For this purpose, a low‐molecular‐weight hole‐transport material based on triphenyl amines bearing crosslinkable oxetane groups was synthesized. Crosslinking of the spin‐coated layer was initiated with UV irradiation using an iodonium‐salt photoinitiator and was observed using realtime FT‐IR spectroscopy. Standard photolithography techniques can be used for structuring the material on the micrometre scale.An AFM image of the photopatterned bis‐oxetane‐functionalized low‐molecular‐weight hole‐transport material based on triphenyl amines synthesized here.