Publication: Thin film studies characteristics of cadmium telluride on different glass substrates – solar cell application
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Date
2008-04-01
Authors
Chan, Siew Chin
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Abstract
Cadmium telluride (CdTe) is one of the most famous materials used in solar cell fabrication due to its high efficiency and low manufacturing cost. A series of CdTe thin films have been deposited on corning glass and soda lime glass by using electron beam (E-Beam) method. The transmittance and absorptance of the films was measured in the spectral range of 190-1100m. The absorption coefficient, a of CdTe thin film was dependent on the photon energy, hv. From the optical measurement, an analysis on band gap energy of cadmium telluride was carried out. The band gap energy can be categorized into direct and indirect with energy range from 1.10eV to 1.80eV. Photoluminescence (PL) was used to probe the changes in the optoelectronic properties of CdTe thin film which was treated with oxygen. The XRD measurements were studied in this paper to determine the film stoichiometry. From the XRD measurements it was found out that the films were zine-blende-type structure. In these report, different process current, / range from 0.60ampere to 1.20ampere with different substrates of soda-lime glass (SLG) and Corning glass (borosilicate glass) respectively were used to examine their effects on the growth of CdTe. The results were discussed and compared with the published report by other researchers.