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Measurement of interchain and intrachain exciton hopping barriers in luminescent polymer

Santos, P.L.; Costa, B.B.A.; Araujo, K.S.; Cury, L.A.; Snedden, E.W.; Bourdakos, K.N.; Dias, F.B.; Monkman, A.P.

Authors

P.L. Santos

B.B.A. Costa

K.S. Araujo

L.A. Cury

E.W. Snedden

K.N. Bourdakos



Abstract

The integrated photoluminescence intensity in thin films of 'Super Yellow' copolymer has been analyzed using a Mott-like temperature dependence. This has enabled us to observe contributions from two emission channels, indicative of exciton recombination proceeding from two distinct origins. At high temperature, interchain thermally activated exciton energy transfer and migration dominates, resulting in large scale quenching of the integrated emission intensity and hence the photoluminescence quantum yield. However, at relatively low temperature, an additional increase of the integrated emission intensity occurs. This new channel of emission has been attributed to recombination from excitons where intrachain exciton energy transfer between adjacent subunits of the copolymer backbone becomes hindered. The activation energy barriers that control both of these emission channels have been obtained and are correlated with chain backbone degrees of freedom.

Citation

Santos, P., Costa, B., Araujo, K., Cury, L., Snedden, E., Bourdakos, K., …Monkman, A. (2011). Measurement of interchain and intrachain exciton hopping barriers in luminescent polymer. Journal of Physics: Condensed Matter, 24(1), https://doi.org/10.1088/0953-8984/24/1/015801

Journal Article Type Article
Publication Date 2011
Deposit Date Dec 1, 2016
Journal Journal of Physics: Condensed Matter
Print ISSN 0953-8984
Electronic ISSN 1361-648X
Publisher IOP Publishing
Volume 24
Issue 1
DOI https://doi.org/10.1088/0953-8984/24/1/015801