Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 26, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3167811
Keywords
crystallisation; electrodes; electron-hole recombination; II-VI semiconductors; nanofabrication; nanostructured materials; photovoltaic effects; solar cells; sputter deposition; sputtered coatings; titanium compounds; wide band gap semiconductors; zinc compounds
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The ZnO/TiO2 core/shell structure was formed through deposition of a TiO2 coating layer on the hydrothermally fabricated ZnO nanorod arrays through radio frequency magnetron sputtering. The effects of the TiO2 shell's characteristics on the current-voltage behaviors of the core/shell-based dye-sensitized solar cells (CS-DSSC) were investigated. As the rates of injection, transfer, and recombination of electrons of such CS-DSSC were affected significantly by the crystallization, morphology, and continuity of the TiO2 shells, the photovoltaic efficiency was accordingly varied remarkably. In addition, the efficiency was further improved by enhancing the surface area in the core/shell electrode.
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