Wide energy-window view on the density of states and hole mobility in poly(p-phenylene vinylene).
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 4 orders of magnitude when the electrochemical potential is scanned through the DOS.
Hulea
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IN
Kamerlingh Onnes Laboratory, Leiden University, POB. 9504, 2300 RA Leiden, The Netherlands.
Brom
H B
HB
Houtepen
A J
AJ
Vanmaekelbergh
D
D
Kelly
J J
JJ
Meulenkamp
E A
EA