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This paper reports on the preparation of nano-structured of MgxZn1-xO thin films by sol-gel spin coating method which will be used as a template layer to grow carbon nanotubes. The MgxZn1-xO films were deposited on Pt/Si (100) substrates. In this work, we focused on the effect of sol aging and Mg content on the film structure and resistivity. Sols with Mg content of x = 0.1, 0.3 and 0.5 were subjected...
Cadmium telluride (CdTe) is a good absorber layer for solar cells with a predicted efficiency of 29% however the highest reported efficiency is only <17% due to various loss mechanisms. One particular loss is attributed to non-uniformity in grain shape and size by Karpov. Simulation of Karpov's model yields counter-intuitive insight that highlights how empirical data can lead researchers to wrong...
Ultravoilet (UV) photodetectors have been fabricated by rf magnetron sputtered ZnO films. The average grain size of ZnO films were 15-20 nm. Photo-response (Ion/Ioff) of as-grown ZnO film of thickness 100 nm was maximum (3.8 times 103) having relatively small response time ~90 ms for UV intensity of 140 muW/cm2 (lambda= 365 nm). ZnO films were irradiated by pulsed Nd:YAG laser corresponding to both...
Cuprous oxide (Cu2O), a direct band gap semiconductor with energy band gap about 2.0eV, has been regarded as one of the most promising materials for application in photovoltaic cells. Nanocrystalline cuprous oxide thin films has been deposited on glass and Si substrates by dc reactive magnetron sputtering method. The effect of substrate temperature and dc power on the nanocrystalline cuprous oxide...
Size quantised cadmium sulphide (CdS) nanocrystalline thin films with different particle sizes and stoichiometric ratios were successfully grown on indium tin oxide substrates using an aqueous synthetic route. The effect of cadmium (Cd) to sulphur (S) ratio on the optical properties of CdS nanocrystalline films was investigated using EDAX, UV-vis spectroscopy, photoluminescence and Raman spectroscopy...
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