Room temperature liquefied petroleum gas (LPG) sensor
Thin films
0103 physical sciences
LPG sensor
Selectivity
600
Heterojunction
02 engineering and technology
LPG sensor model
540
0210 nano-technology
Stability
01 natural sciences
DOI:
10.1016/j.snb.2010.02.063
Publication Date:
2010-03-11T09:57:36Z
AUTHORS (5)
ABSTRACT
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.
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