Self-standing chitosan films as dielectrics in organic thin-film transistors


Organic thin film transistors, using self-standing 50 gin thick chitosan films as dielectric, are fabricated using sublimed pentacene or two conjugated polymers deposited by spin coating as semiconductors. Field-effect inobilities are found to be similar to values obtained with other dielectrics and, in the case of pentacene, a value (0.13 cm(2)/(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 biocoinpatible electronics in particular.



subject category

Polymer Science


Morgado, J; Pereira, AT; Braganca, AM; Ferreira, Q; Fernandes, SCM; Freire, CSR; Silvestre, AJD; Neto, CP; Alcacer, L

our authors


This work was supported by FCT-Portugal under the contracts PTDC/CTM/099452/2008, PTDC/CTM/102144/2008 and PEst-OE/EEI/LA0008/2013. QF thanks FCT for a post-doc grant.

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