Wide energy-window view on the density of states and hole mobility of poly(p-phenylene vinylene)

Details Wide energy-window view on the density of states and hole mobility of poly(p-phenylene vinylene) Wide energy-window view on the density of states and hole mobility of poly(p-phenylene vinylene)

2004-09-09

arxiv.org/abs/cond-mat/0409218v1

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

Using an electrochemically gated transistor, we achieved controlled and reversible doping of poly(p-phenylene vinylene) in a large concentration range. Our data open a wide energy-window view on the density of states (DOS) and show, for the first time, that the core of the DOS function is Gaussian, while the low-energy tail has a more complex structure. The hole mobility increases by more than four orders of magnitude when the electrochemical potential is scanned through the DOS.

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