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Electron microscopy cross sectional views of bare (a) and coated [(b) and (c)] ZnO nanorod arrays. ZnO nanorods were grown for [(a) and (b)] and for (c). 25 (b) and 50 (c) cycles of spray ILGAR were used to deposit . The inset (b) shows a broken nanorod coated with and an illustration of .
Dependence of the ZnO nanorod diameter (a) of (b) and of , i.e., the total thickness of (c) on the length of the ZnO nanorods for the given set of samples. The number of spray ILGAR cycles were adjusted to keep nearly constant.
External QE of small area solar cell structures on compact ZnO and on ZnO nanorods of different lengths.
Current voltage characteristics under AM1.5 illumination for small area solar cell structures on compact ZnO and on ZnO nanorods with different lengths. The inset shows the dependence of the normalized short circuit current on the normalized internal surface area given by .
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