Photovoltaic response of nanocrystalline cadmium telluride in photoelectrochemical cells
Preeti Pathak, Kavita Gour, M. Ramrakhiani, P. Mor
Among various techniques for preparation of nanometer size materials, chemical methods offer better orientation, which are less expensive, non-polluting and easy to incorporate suitable doping materials for altering the film properties. These processes enable formation of thin films onto glass substrates in addition to the conducting films (substrates) which can potentially lead to a new generation of photovoltaic devices that are light in weight, foldable, flexible and mouldable. The thin films of cadmium telluride have been prepared in this work by direct chemical deposition method and annealed at 200°C for 2 hrs for crystallinity improvement. The preparation of CdTe film photoelectrodes for different deposition time, at different temperature and from different concentrations of precursor solution are discussed here. Effect of preparation parameters on physical, structural, microstructural, and electrical properties of these films and their photovoltaic response in a PEC cell have been investigated. The thin films of CdTe on glass substrate were used for characterization by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM) and absorption spectroscopy. The nanocrystalline CdTe thin film on conducting glass substrates were used as photoelectrodes in PEC cells and the photovoltaic response has been studied optimising the preparation parameters.
Keywords
Cadmium Telluride Thin Films, Chemical Bath Deposition (CBD), Photoelectrochemical Cells, Photovoltaic Effect, XRD, UV-Vis Absorption
Published online 8/2/2017, 56 pages
DOI: https://dx.doi.org/10.21741/9781945291371-6
Part of Recent Advances in Photovoltaics
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