Room temperature liquefied petroleum gas (LPG) sensor

Dattatray Dhawale, D. P. Dubal, A. M. More, T. P. Gujar, C. D. Lokhande

Research output: Contribution to journalArticle

66 Citations (Scopus)


The p-polyaniline/n-ZnO thin film heterojunction sensor for room temperature LPG detection was fabricated by electrodepositing polyaniline on chemical bath deposited ZnO film. The heterojunction showed rectifying behavior indicating the formation of a diode with ideality factor 1.10. The formation of diffusion free interface of heterojunction was confirmed from cross-sectional FESEM. The heterojunction sensor has quick and high response towards LPG as compared to N2 and CO2 and exhibited maximum response of 81% upon exposure of 1040 ppm of LPG. The LPG sensing mechanism for heterojunction is modeled through change in height of barrier potential.

Original languageEnglish
Pages (from-to)488-494
Number of pages7
JournalSensors and Actuators, B: Chemical
Issue number2
Publication statusPublished - 3 Jun 2010
Externally publishedYes



  • Heterojunction
  • LPG sensor
  • LPG sensor model
  • Selectivity
  • Stability
  • Thin films

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Instrumentation

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