A new electrodeposition method for making porous ZnO layers with highly oriented and columnar morphology is reported here. A monolayer of dye is adsorbed onto the ZnO followed by electrodeposition of p-type CuSCN to create a complete inner-surface electrical contact, resulting in a bicontinuous-network heterojunction (see Figure) to give a photovoltaic cell showing record conversion efficiency.
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O’Regan et al. (2000) studied this question.