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Optical and electrical properties of CdO: Sn thin films for solar cell applications

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Date
2014
Author
Makori, N. E.
Amatalo, I. A.
Karimi, P. M.
Njoroge, W. K.
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Abstract
Tin doped Cadmium Oxide (CdO:Sn) thin films were successfully deposited by thermal evaporation in the Edward’s Auto 306 Magnetron Sputtering System. Their optical and electrical properties were studied using Solid Spec-3700 DUV Spectrophotometer and Four Point Probe respectively. The optical properties of CdO:Sn thin films showed high transparency in the visible region of the electromagnetic spectrum which varied with Sn doping, this makes CdO:Sn an excellent candidate for optoelectronic applications such as a window layer. Undoped Cadmium Oxide (CdO) thin films were also prepared for comparison with tin doped Cadmium Oxide thin films. Doped and undoped Cadmium Oxide had a transmittance of 70-85% and 50-89% respectively. Band gap energy for undoped CdO was 2.43eV while that of tin doped CdO ranged between 3.19-3.29eV for tin doping of 1-7%. Resistivity of undoped and Tin doped Cadmium Oxide ranged between 16-93Ωcm.
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http://ir-library.ku.ac.ke/handle/123456789/14849
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