Abstract
Based on the porous anodic aluminum oxide templates, ordered SnOx nanopore films (approximately 150 nm thickness) with different x (x ≈ 0.87, 1.45, 2) have been successfully fabricated by direct current magnetron sputtering and oxidizing annealing. Due to the high specific surface area, this ordered nanopore films exhibit a great improvement in recovery time compared to thin films for ultraviolet (UV) detection. Especially, the ordered SnOx nanopore films with lower x reveal higher UV light sensitivity and shorter current recovery time, which was explained by the higher concentration of the oxygen vacancies in this SnOx films. This work presents a potential candidate material for UV light detector.PACS: 81.15.Cd, 81.40.Ef, 81.70.Jb, 85.60.Gz.
Highlights
Tin oxide is a wide band-gap (3.6 eV) n-type semiconductor and exhibits unique electrical and optical properties
In conclusion, we firstly report an effective method for the fabrication of ordered SnOx nanopore films
Reversible photoconductive switching characteristics of the films were exhibited by switching UV light on/off, which is ascribed to the oxygen desorption/reabsorption on the surface of SnOx film
Summary
Tin oxide is a wide band-gap (3.6 eV) n-type semiconductor and exhibits unique electrical and optical properties. It has been used extensively for gas sensors [1,2,3,4], solar cells [5], optoelectronic devices [6], catalysts [7], lithium-ion batteries [8], and so forth. In the last few years, intensive attention has been paid to fabricate a variety of SnO2 nanostructured materials, such as nanowires [9], nanobelts [10], nanoribbons [11], nanotubes [9,12], nanoparticles [13], and nanowhiskers [14]. Little attention had been paid to 2D ordered SnO2 porous nanomaterials as electronic and chemical devices. We firstly report the fabrication and UV photoconductivity switching properties of highly
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