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Issue 39, 2018
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Temperature dependence of the photo- and electroluminescence of poly(p-phenylene vinylene) based polymers

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Abstract

We show that the exciton transport and decay processes in two poly(p-phenylene vinylene) (PPV) based semiconducting polymers exhibit distinct temperature dependence based on the energetic disorder of the polymer. Time-resolved photoluminescence (TRPL) spectroscopy and Monte Carlo exciton diffusion simulations are used to disentangle the contributions from radiative and non-radiative decay processes, with the latter including non-radiative decay due to exciton diffusion toward trap sites. In a highly disordered polymer, the exciton lifetime and quantum yield are nearly temperature independent. In the case of a less disordered polymer, the exciton lifetime and quantum yield increase with decreasing temperature, due to both freezing out vibrations and less exciton quenching by slowing down the diffusion toward trap sites. We further demonstrate that the temperature dependence of the electroluminescence of polymer light-emitting diodes comprising these polymers is directly correlated with the photoluminescence behavior.

Graphical abstract: Temperature dependence of the photo- and electroluminescence of poly(p-phenylene vinylene) based polymers

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Publication details

The article was received on 26 Apr 2018, accepted on 04 Sep 2018 and first published on 04 Sep 2018


Article type: Paper
DOI: 10.1039/C8TC01998C
Citation: J. Mater. Chem. C, 2018,6, 10569-10579
  • Open access: Creative Commons BY license
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    Temperature dependence of the photo- and electroluminescence of poly(p-phenylene vinylene) based polymers

    I. Rörich, A. Schönbein, D. K. Mangalore, A. Halda Ribeiro, C. Kasparek, C. Bauer, N. I. Crăciun, P. W. M. Blom and C. Ramanan, J. Mater. Chem. C, 2018, 6, 10569
    DOI: 10.1039/C8TC01998C

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