A Simple Energy Harvesting Device for Indoor Environment Based on Sn3O4 Photoanode

This paper reports a device, which has a simple structure with wet filter paper sandwiched by the photoanode made of a stainless mesh coated Sn3O4 and the platinum cathode. The photoanode was fabricated by hydrothermal synthesis. By using this method, ball-like Sn3O4 particles were formed on the stainless mesh substrate. Experimental results showed that the device generated stable power output for over one week in an indoor environment. In addition, the power density of 0.61 µW/cm2 was generated by the device.