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Organic Light‐Emitting Devices: Instant Low‐Temperature Cross‐Linking of Poly( N ‐vinylcarbazole) for Solution‐Processed Multilayer Blue Phosphorescent Organic Light‐Emitting Devices (Adv. Mater. 45/2014)
Author(s) -
Aizawa Naoya,
Pu YongJin,
Chiba Takayuki,
Kawata So,
Sasabe Hisahiro,
Kido Junji
Publication year - 2014
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.201470311
Subject(s) - materials science , phosphorescence , annealing (glass) , acetonitrile , photochemistry , solvent , organic solvent , oxidative coupling of methane , chemical engineering , organic chemistry , catalysis , optics , composite material , chemistry , fluorescence , physics , engineering
Poly( N ‐vinylcarbazole) undergoes crosslinking to form highly solvent‐resistant films through an oxidative coupling reaction induced by phosphomolybdic acid, which occurs rapidly upon spin‐coating their precursor solutions and annealing them for 3 min at 110 °C, removing acetonitrile, which acts as an inhibitor of the oxidative coupling. This reaction allows highly efficient solution‐processed multilayer organic light‐emitting devices to be constructed without a time‐consuming annealing process, as demonstrated by Y.‐J. Pu, J. Kido, and co‐workers on page 7543.