Tuning of CO gas sensing performance of spray pyrolyzed ZnO thin films by electron beam irradiation
作者： Aninamol Ani , P Poornesh , KK Nagaraja , E Kolesnikov , Igor V Shchetinin
DOI: 10.1016/J.MSSP.2020.105249
关键词:
摘要: Abstract Electron beam induced effects on the sensing performance of spray-coated ZnO thin films for carbon monoxide (CO) detection are reported. The optical transmittance pristine film was around 80% and decreased upon e-beam treatment. XRD studies confirmed hexagonal wurtzite structure ZnO. Carbon measurements performed at 300 °C revealed that irradiated exhibited enhanced response recovery time compared to film. 5 kGy displayed improved with respect towards CO concentrations tested. It showed a quick 43 s 77 s lowest detected gas limit 2 ppm. 10 kGy 5 s sensor an excellent 1.39 2.63 2 ppm 5 ppm respectively. observed enhancement in both times as well is ascribed oxygen vacancies present which evident from photoluminescence also due large number grain boundaries.
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