Effect of Temperature and Growth Time on Vertically Aligned ZnO Nanorods by Simplified Hydrothermal Technique for Photoelectrochemical Cells.

According to Figure 7 and Table 1 , an increasing trend in current density was observed as the temperature increases from 90 to 120 °C, but the photocurrent density decreased drastically by 87.40% from 120 °C (0.1944 mA/cm 2 ) to 130 °C (0.0245 mA/cm 2 ).

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On the other hand, an obvious trend is shown in Figure 6 , in which the band gap energy decreases as the growth time increases.

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