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Issue 40, 2015
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Performance enhancement of poly(3-hexylthiophene-2,5-diyl) based field effect transistors through surfactant treatment of the poly(vinyl alcohol) gate insulator surface

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Abstract

We report on the improvement of field effect transistors based on poly(3-hexylthiophene-2,5-diyl) (P3HT) as a channel semiconductor and crosslinked poly(vinyl alcohol) (cr-PVA) as a gate insulator, through the treatment of the cr-PVA film surface before P3HT deposition. We treated the cr-PVA either with hydrochloric acid (HCl) or with a cationic surfactant, hexadecyltrimethylammonium bromide (CTAB), aiming at the passivation of the hole traps at the cr-PVA/P3HT interface. The treatment with HCl leads to an excessive increase in the transistor leakage current and unstable electrical characteristics, despite implying an increase in the gate capacitance. The treatment with CTAB leads to transistors with ca. 50% higher specific capacitance and a tenfold increase in the charge carrier field-effect mobility, when compared to devices based on untreated cr-PVA.

Graphical abstract: Performance enhancement of poly(3-hexylthiophene-2,5-diyl) based field effect transistors through surfactant treatment of the poly(vinyl alcohol) gate insulator surface

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Publication details

The article was received on 22 May 2014, accepted on 31 Jul 2014 and first published on 04 Aug 2014


Article type: Paper
DOI: 10.1039/C4CP02245A
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2015,17, 26530-26534
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    Performance enhancement of poly(3-hexylthiophene-2,5-diyl) based field effect transistors through surfactant treatment of the poly(vinyl alcohol) gate insulator surface

    A. Nawaz, I. Cruz-Cruz, R. Rodrigues and I. A. Hümmelgen, Phys. Chem. Chem. Phys., 2015, 17, 26530
    DOI: 10.1039/C4CP02245A

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