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- Title
Intrinsic defects and structural phase of ZnS nanocrystalline thin films: effects of substrate temperature.
- Authors
Patel, Shiv; Pivin, J.; Chandra, Ramesh; Kanjilal, D.; Kumar, Lokendra
- Abstract
Fabrications of ZnS nanocrystalline thin films at different substrate temperatures (T) of 200, 300 and 400 °C by means of pulsed laser deposition are presented. Thin film deposited at T of 200 °C is in cubic zinc-blende (ZB) structure while those deposited at T of 300 and 400 °C are in hexagonal wurtzite (W) phase. The grain size, surface roughness and bandgap of the films increases with increasing T. The zinc vacancies and interstitials in the films increases while sulfur vacancies decreases with increasing T. The variation of zinc and sulfur vacancies in ZnS films with T is responsible for structural phase transition from ZB to W which causes the change in energy bandgap.
- Subjects
THIN films; SUBSTRATES (Materials science); ZINC; SULFUR; WURTZITE
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 6, p5640
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-4472-y