Journal
APPLIED PHYSICS LETTERS
Volume 88, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2176857
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The effect of a perforated transparent electrode, which is an electrode punctuated with holes, on light transmittance and light scattering was studied using textured ZnO:Ga formed by wet etching. The perforations were found to play a role not only in improving transmittance but also in maintaining high haze factor. The influence of the surface morphology of textured ZnO:Ga on the growth of hydrogenated microcrystalline silicon and on solar cell performance was also studied. It was found that, while the ZnO:Ga surface is not steep, a height difference is present on the substrate surface at the edge of the perforations. To resolve this problem, an additional thin ZnO:Ga layer was deposited on a substrate which already had a perforated transparent electrode. Improvements in solar cell performance were obtained while high open circuit voltage and high fill factor were maintained.
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