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Proceedings Paper

Factors determining polaron mobility in light-emitting diodes
Author(s): Esther M. Conwell; Yuri N. Gartstein
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Paper Abstract

Mobility of positive polarons in poly(phenylene vinylene), PPV, measured by time of flight methods, rages from approximately 10-3 to 10-7 cm2/Vs at room temperature. The large range indicates that the materials are disordered. Both disorder and polaronic effects contribute to the activation energy for hopping, but in PPV the polaronic effects are less important and to first approximation may be neglected. Comparison of the observed field dependence of mobility for two sets of samples with the results of Monte Carlo simulations leads to the conclusion that the contribution of site energy disorder is predominant in one case, but comparable to that of orientational disorder in the other. We suggest that the most important factor leading to the wide range of mobility values is different distributions of conjugation lengths, resulting from different choices of precursor polymer and conversion protocol.

Paper Details

Date Published: 15 September 1995
PDF: 9 pages
Proc. SPIE 2528, Optical and Photonic Applications of Electroactive and Conducting Polymers, (15 September 1995); doi: 10.1117/12.219557
Show Author Affiliations
Esther M. Conwell, Xerox Webster Research Ctr. and Univ. of Rochester (United States)
Yuri N. Gartstein, Xerox Webster Research Ctr. and Univ. of Rochester (United States)


Published in SPIE Proceedings Vol. 2528:
Optical and Photonic Applications of Electroactive and Conducting Polymers
Sze Chang Yang; Prasanna Chandrasekhar, Editor(s)

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