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Exciton Migration and Trapping in Copolymers Based on Dialkylfluorenes
Author(s) -
Klärner Gerrit,
Lee JeongIk,
Davey Mark H.,
Miller Robert D.
Publication year - 1999
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/(sici)1521-4095(199902)11:2<115::aid-adma115>3.0.co;2-n
Subject(s) - polyfluorene , materials science , chromophore , copolymer , exciton , trapping , polymer , photochemistry , optoelectronics , diode , oled , nanotechnology , layer (electronics) , composite material , chemistry , quantum mechanics , biology , ecology , physics
Poly(fluorenes) have potential use in light‐emitting diodes ; however, their application has been hampered by their tendency to form excimers and aggregates. In this paper, the copolymerization of 2,7‐dibromo‐9,9‐dialkylfluorenes with low‐bandgap chromophores, such as 3,9(3,10)‐dibromoperylene and 4,4′‐dibromo‐α‐cyanostilbene, is described. These readily soluble and processable polymers display longer wavelength emissions than polyfluorene homopolymers in thin films, which indicates rapid exciton migration and trapping in these systems.