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- Title
Effect of deposition temperature on structural, optical and electrical properties of nanocrystalline SnSe thin films.
- Authors
Shikha, Deep; Mehta, Vimal; Sharma, Jeewan; Chauhan, R.
- Abstract
SnSe thin films have been prepared by chemical bath deposition method at different substrate temperature. The influence of deposition temperature on structural, optical and electrical properties of polycrystalline SnSe films have been investigated using X-ray diffraction, optical absorbance and conductivity measurements. The X-ray diffraction study reveals the orthorhombic structure of the SnSe films oriented along the (111) direction. The structural parameters such as lattice spacing, crystallite size, strain, number of crystallites per unit area and dislocation density have been evaluated. Optical absorbance measurement indicates the existence of direct allowed band gap in the range 1.50-1.91 eV. The dark conductivity (σ) and photoconductivity (σ) measurement in the temperature range (278-385 K), indicates that the conduction in these materials is through an activation process having one activation energy. σ and σ values decrease with the decrease of crystallite size. The value of photosensitivity, carrier life time and trap depth have also been calculated.
- Subjects
TIN selenide; THIN films; POLYCRYSTALS; OPTICAL properties; ELECTRIC properties of solids; PHOTOSENSITIVITY; X-ray diffraction
- Publication
Journal of Materials Science: Materials in Electronics, 2017, Vol 28, Issue 3, p2487
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5822-5