Abstract

The effect of boric acid (H3BO3) composition at constant concentration of hexamethylenetetramine (HMT) and zinc nitrate (Zn(NO3)2) on the morphology, thickness, elemental composition, optical absorption, structure, photoluminescence of ZnO nanotubes has been investigated. The performance of the DSSC utilizing the ZnO samples has also been studied. It was found that the structure, thickness, elemental composition, optical absorption and morphology of ZnO nanostructure are significantly affected by the concentration of H3BO3. The diameter and thickness of ZnO nanotubes decreases as the composition of H3BO3 increases. The DSSC utilizing ZnO nanotubes synthesized at 2 wt. % H3BO3 performs the highest JSC and η of 2.67 mA cm−2 and 0.29%, respectively. The highest performance of the device is due to the highest optical absorption of ZnO nanotubes sample and lowest charge interfacial resistance.

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