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Phase Separation of Polyfluorene‐Based Blend Films and Its Influence on Device Operations
Author(s) -
Xia Y.,
Friend R. H.
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.200502338
Subject(s) - polyfluorene , materials science , wetting , substrate (aquarium) , layer (electronics) , phase (matter) , polymer , polymer blend , optoelectronics , wetting layer , optical microscope , composite material , copolymer , scanning electron microscope , electroluminescence , organic chemistry , oceanography , chemistry , geology
Vertical phase separations have been found in blend films (TFB:F8BT) of polymer light‐emitting diodes, giving rise to better device performances. A TFB wetting layer is present over most of the bottom interface with the substrate, as evidenced by the fluorescent microscopy images after top layers are etched away by oxygen plasma (see figure).