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Improved Performance p-type Polymer (P3HT) / n-type Nanotubes (WS2) Electrolyte Gated Thin-Film Transistor

Published online by Cambridge University Press:  25 March 2018

Eleonora Macchia
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”, Bari, Italy
Alla Zak
Affiliation:
HIT-Holon Institute of Technology, Holon, Israel
Rosaria Anna Picca
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”, Bari, Italy
Kyriaki Manoli
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”, Bari, Italy
Cinzia Di Franco
Affiliation:
CNR - Istituto di Fotonica e Nanotecnologie, Sede di Bari (I)
Nicola Cioffi
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”, Bari, Italy
Gaetano Scamarcio
Affiliation:
CNR - Istituto di Fotonica e Nanotecnologie, Sede di Bari (I) Dipartimento di Fisica “M. Merlin” - Università degli Studi di Bari –“Aldo Moro” - Bari (I)
Reshef Tenne*
Affiliation:
Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot, Israel
Luisa Torsi*
Affiliation:
Dipartimento di Chimica, Università degli Studi di Bari “A. Moro”, Bari, Italy Abo Akademi Univeristy, Turku, Finland
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Abstract

This work decribes the enhancement of the electrical figures of merit of an Electrolyte Gated Thin-Film Transistor (EG-TFT) comprising a nanocomposite of n-type tungsten disulfide (WS2) nanotubes (NTs) dispersed in a regio-regular p-type poly(3-hexylthiophene-2,5-diyl) (P3HT) polymeric matrix. P3HT/WS2 nanocomposites loaded with different concentrations of NTs, serving as EG-TFTs electronic channel materials have been studied and the formulation has been optimized. The resulting EG-TFTs figures of merit (field-effect mobility, threshold voltage and on-off ratio) are compared with those of the device comprising a bare P3HT semiconducting layer. The optimized P3HT/WS2 nanocomposite, comprising a 60% by weight of NTs, results in an improvement of all the elicited figures of merit with a striking ten-fold increase in the field-effect mobility and the on/off ratio along with a sizable enhancement of the in-water operational stability of the device.

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Articles
Copyright
Copyright © Materials Research Society 2018 

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