Open AccessGreen light activated hydrogen sensing of nanocrystalline composite ZnO-In2O3 films at room temperature
Author(s) -
A. S. Ilin,
М. И. Иким,
П. А. Форш,
Т. В. Белышева,
M. N. Martyshov,
П. К. Кашкаров,
Л. И. Трахтенберг
Publication year - 2017
Publication title -
scientific reports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.24
H-Index - 213
ISSN - 2045-2322
DOI - 10.1038/s41598-017-12547-5
Subject(s) - nanocrystalline material , composite number , materials science , photoconductivity , hydrogen , non equilibrium thermodynamics , charge carrier , atmosphere (unit) , optoelectronics , sensitivity (control systems) , chemical engineering , nanotechnology , composite material , chemistry , thermodynamics , electronic engineering , physics , organic chemistry , engineering
The possibility of reducing the operating temperature of H 2 gas sensor based on ZnO-In 2 O 3 down to room temperature under green illumination is shown. It is found that sensitivity of ZnO-In 2 O 3 composite to H 2 nonmonotonically depends on the oxides’ content. The optimal ratio between the components is chosen. The new mechanism of nanocrystalline ZnO-In 2 O 3 sensor sensitivity to H 2 under illumination by green light is proposed. The mechanism considers the illumination turns the composite into nonequilibrium state and the photoconductivity change in the H 2 atmosphere is linked with alteration of nonequilibrium charge carriers recombination rate.