Impact of piezo-phototronic effect on ZnMgO/Se heterojunction photovoltaic devices

This paper investigates the impact of piezo-phototronic effects on the power conversion efficiency of ZnMgO/Se heterojunction photovoltaic devices. Sputter-deposited ZnMgO thin film and photo-absorbing Se were employed as the n-type window layer and p-type layer, respectively, to form a photovoltaic device on a flexible polyethylene terephthalate film. The applied strain was varied, and the changes due to the applied strain were recorded. The open-circuit voltage (Voc) increased from 0.59 V to 0.75 V when the applied strain was increased from - 0.41-0.40% by varying the bending angle. It has been reported that piezoelectric polarization of ZnMgO can decrease conduction band offset (CBO) between the ZnMgO and Se layers.

Automated summary

This study investigates the impact of piezo-phototronic effects on the power conversion efficiency of ZnMgO/Se heterojunction photovoltaic devices. The results show that piezoelectric polarization can decrease the conduction band offset and increase the output voltage of the photovoltaic device.