A comparative study of the gas sensing behavior in P3HT- and PBTTT-based OTFTs: the influence of film morphology and contact electrode position

Sensors (Basel). 2014 Sep 11;14(9):16869-80. doi: 10.3390/s140916869.

Abstract

Bottom- and top-contact organic thin film transistors (OTFTs) were fabricated, using poly(3-hexylthiophene-2,5-diyl) (P3HT) and poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene] (PBTTT-C16) as p-type channel semiconductors. Four different types of OTFTs were fabricated and investigated as gas sensors against three volatile organic compounds, with different associated dipole moments. The OTFT-based sensor responses were evaluated with static and transient current measurements. A comparison between the different architectures and the relative organic semiconductor was made.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Conductometry / instrumentation*
  • Electrodes*
  • Equipment Design
  • Equipment Failure Analysis
  • Gases / chemistry*
  • Membranes, Artificial*
  • Polymers / chemistry*
  • Thiophenes / chemistry*
  • Transistors, Electronic*
  • Volatile Organic Compounds / analysis

Substances

  • Gases
  • Membranes, Artificial
  • Polymers
  • Thiophenes
  • Volatile Organic Compounds
  • poly(3-hexylthiophene-2,5-diyl)