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Polyfluorene Light‐Emitting Diodes: Understanding the Nature of the States Responsible for the Green Emission in Oxidized Poly(9,9‐dialkylfluorene)s: Photophysics and Structural Studies of Linear Dialkylfluorene/Fluorenone Model Compounds (Adv. Funct. Mater. 13/2009)
Author(s) -
Chan Khai Leok,
Sims Marc,
Pascu Sofia I.,
Ariu Marilù,
Holmes Andrew B.,
Bradley Donal D. C.
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200990055
Subject(s) - fluorenone , polyfluorene , materials science , oled , light emitting diode , diode , luminous efficacy , optoelectronics , degradation (telecommunications) , polymer , phosphorescence , green light , photochemistry , fluorene , nanotechnology , optics , blue light , layer (electronics) , composite material , physics , chemistry , copolymer , telecommunications , fluorescence , computer science
Polyfluorenes, whilst attractive candidates for polymer light‐emitting diodes, are susceptible to oxidative degradation. This degradation results in significant green emission. Although it has been linked to the formation of fluorenones, the precise relationship between fluorenones and the observed color shift remains widely debated. On page 2147 , Chan et al. report a study on this relationship with the use of a series of model compounds. Inter‐molecular fluorenone–fluorenone interaction is reported to be an essential requirement for the color shift.