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Organic Light‐Emitting Diodes: The Effect of Ketone Defects on the Charge Transport and Charge Recombination in Polyfluorenes (Adv. Funct. Mater. 23/2011)
Author(s) -
Kuik Martijn,
Wetzelaer GertJan A. H.,
Laddé Jurre G.,
Nicolai Herman T.,
Wildeman Jurjen,
Sweelssen Jörgen,
Blom Paul W. M.
Publication year - 2011
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.201190111
Subject(s) - materials science , charge (physics) , diode , recombination , optoelectronics , oled , polymer , trap (plumbing) , charge carrier , photochemistry , nanotechnology , chemistry , physics , biochemistry , layer (electronics) , quantum mechanics , meteorology , composite material , gene
Polyfluorenes are widely studied for applications in polymer light‐emitting diodes. Unfortunately, blue‐light‐emitting polyfluorenes suffer from rapid degradation at ambient conditions, resulting in green emission. On page 4502 , Paul W. M. Blom and co‐workers study the effect of ketone defects on the charge transport and recombination properties of such polyfluorenes. Charge transport is strongly hindered by both electron and hole trap‐ping on these ketone defects. Additionally, the green emission is shown to originate from a trap‐assisted recombination process.