Heterogeneous SnO2/ZnO nanoparticulate film: Facile synthesis and humidity sensing capability. (July 2018)

• Record Type: Journal Article
• Authors: Ismail, A.S.; Mamat, M.H.; Malek, M.F.; Yusoff, M.M.; Mohamed, R.; Sin, N.D. Md.; Suriani, A.B.; Rusop, M.
• Is Part Of: Materials science in semiconductor processing. Volume 81(2018)
• Page Start: 127
• Page End: 138
• Publication Date: 2018-07
• Subjects: Immersion -- ZnO -- ZnO/SnO2 -- Tin oxide -- Heterojunction -- Humidity sensor; Semiconductors -- Periodicals; Integrated circuits -- Materials -- Periodicals; Semiconducteurs -- Périodiques; Circuits intégrés -- Matériaux -- Périodiques; Electronic journals; 621.38152
• DOI: 10.1016/j.mssp.2018.03.022
• Languages: English
• ISSNs: 1369-8001

Abstract

Abstract: Highly sensitive and extremely thin tin oxide/zinc oxide (SnO2 /ZnO) heterojunction films were prepared via a two-step solution-based method for humidity-sensing application. The average diameters of the ZnO and SnO2 nanoparticles were 26 and 6 nm, respectively. The deposition of SnO2 for 3 min reduced film resistance from 6.74 MΩ to 0.40 MΩ. Remarkably, the humidity-sensing performance of the heterojunction sensors was critically dependent on deposition time, and sensors subjected to 3 min deposition exhibited the highest sensitivity (90.56) to humidity, which was significantly higher than that of bare ZnO. This study indicates that the use of SnO2 /ZnO heterojunction has a great potential in humidity sensing applications.