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Published online by Cambridge University Press: 24 February 2016
Substrate geometry CdTe solar cells have been modified with the addition ofmetal-catalysed nano-structures in order to influence their efficiency.Conditions for the growth of Au- and Bi-catalysed nanostructures were explored.The substrate devices themselves comprised indium tin oxide/CdS/CdTe/Mo foil andwere developed using the MgCl2 alternative to the usualCdCl2 processing – this yielded open circuit voltages ofup to 740 mV. It was demonstrated that the addition of Au-catalysed nanowires to200 nm thick CdTe films on glass substrates decreased their optical transmissionby 10%, this being significantly higher than for thick films. However,reproducibility issues with forming Bi nanostructures limited the devicemodification tests to the use of Au-catalysed wires, and these always acted todepress photovoltaic performance.