A room temperature liquefied petroleum gas sensor based on all-electrodeposited n-CdSe/p-polyaniline junction

In this paper, we report on the performance of a liquefied petroleum gas (LPG) sensor based on n-CdSe/p-polyaniline junction fabricated by a simple electrodeposition technique. The junction diode showed the sensitivity to liquefied petroleum gas (LPG) at room temperature (300 K). Forward biased current–voltage characteristics of the junction diode showed a considerable shift when exposed to various concentrations of LPG. Maximum response up to 70% was achieved for 0.08 vol% LPG. Depending on the concentration of LPG, the response time was ranged between 50 and 100 s, whereas the recovery time was 200 s.