Efficient photo and electroluminescence of regioregular poly(alkylthiophene)s

Piotr Barta , Franco Cacialli , Richard H. Friend , Małgorzata Zagórska

Abstract

We report absolute photoluminescence (PL) and electroluminescence quantum efficiencies for thin films and polymer light-emitting diodes prepared with regioregular (that is, exclusively head-to-head/tail-to-tail conformation and/or exclusively head-to-tail conformation) poly(alkylthiophenes). In particular, we find a maximum PL quantum efficiency of \#x223c;11\% for the head-to-head/tail-to-tail conformers, an order of magnitude higher than for the head-to-tail conformers. The results show that chemical conformation plays a crucial role in determining the material electronic structure and, hence, the relevant optical properties. The results are significant to the wide field of conjugated, synthetic, light-emitting materials, and hence to the development of large-area organic displays. \#xa9; 1998 American Institute of Physics.
Author Piotr Barta
Piotr Barta,,
-
, Franco Cacialli
Franco Cacialli,,
-
, Richard H. Friend
Richard H. Friend,,
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, Małgorzata Zagórska KChTP
Małgorzata Zagórska,,
- Chair Of Polymer Chemistry And Technology
Journal seriesJournal of Applied Physics, ISSN 0021-8979
Issue year1998
Vol84
No11
Pages6279-6284
Keywords in Englishelectroluminescence, light emitting diodes, organic semiconductors, photoluminescence, polymer films
DOIDOI:10.1063/1.368949
Score (nominal)35
Publication indicators WoS Impact Factor: 2006 = 2.316 (2) - 2007=2.38 (5)
Citation count*77 (2015-02-22)
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