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- Title
Spectral properties of aluminium doped zinc oxide thin films prepared by SILAR method.
- Authors
Chandramohan, R.; Dhanasekaran, V.; Ezhilvizhian, S.; Vijayan, T.; Thirumalai, J.; Peter, A.; Mahalingam, T.
- Abstract
The spectral properties of undoped and Al doped ZnO nano thin films prepared using double dip method otherwise called SILAR method (Successive Immersion Layer Adsorption Reaction) are reported. The thin films were having polycrystalline hexagonal structure. The optical properties of these films are studied and reported. The optical constants like the band gap ( E), refractive indices ( n, k), dielectric constant (ε), optical conductivity (σ), were estimated using an approximation algorithm developed from established procedures using transmittance spectrum of the thin films. The average excitation energy ( E), oscillator strength ( E), effective mass ( m*), plasma frequency ( ω), static dielectric constant (ε) and carrier concentration ( N) are also estimated and reported. The highly transparent thin films showed nanowires protruding from stacked nanorods on SEM inspection that signifies the suitability of these thin films for gas sensors.
- Subjects
ZINC oxide; ALUMINUM; THIN films; POLYCRYSTALS; NANOWIRES; OSCILLATOR strengths
- Publication
Journal of Materials Science: Materials in Electronics, 2012, Vol 23, Issue 2, p390
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-011-0439-1