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Controlled β ‐Phase Formation in Poly(9,9‐di‐ n ‐octylfluorene) by Processing with Alkyl Additives
Author(s) -
Peet Jeffrey,
Brocker Erin,
Xu Yunhua,
Bazan Guillermo C.
Publication year - 2008
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.200702515
Subject(s) - materials science , alkyl , polymer , phase (matter) , absorption (acoustics) , xylene , chemical engineering , polymer chemistry , analytical chemistry (journal) , organic chemistry , composite material , chemistry , engineering , benzene
By introducing 1,8‐diiodooctane (DIO) into solutions used to spin cast poly(9,9‐di‐ n ‐octylfluorene) films, the β ‐phase content can be tailored between 0 and 45%. The absorption of films cast from o ‐xylene containing between 0 and 16% DIO by volume is shown at left. In turn, this morphological change can lead to a ca. 50% increase in the efficiency of polymer light emitting diodes.