Self-standing chitosan films as dielectrics in organic thin-film transistors
J. Morgado, A. T. Pereira, A. M. Braganca, Q. Ferreira, S. C. M. Fernandes, C. S. R. Freire, A. J. D. Silvestre, C. Pascoal Neto, L. Alcacer
Vol. 7., No.12., Pages 960-965, 2013
DOI: 10.3144/expresspolymlett.2013.94
DOI: 10.3144/expresspolymlett.2013.94
Corresponding author: J. Morgado 
GRAPHICAL ABSTRACT
ABSTRACT
Organic thin film transistors, using self-standing 50 µm thick chitosan films as dielectric, are fabricated using sublimed pentacene or two conjugated polymers deposited by spin coating as semiconductors. Field-effect mobilities are found to be similar to values obtained with other dielectrics and, in the case of pentacene, a value (0.13 cm2/(V•s) comparable to high performing transistors was determined. In spite of the low On/Off ratios (a maximum value of 600 was obtained for the pentacene-based transistors), these are promising results for the area of sustainable organic electronics in general and for biocompatible electronics in particular.
