Solid-State Solar Cell-Based on CH3NH3PbI3 Perovskite Sensitizer and Mesoporous Anatase TiO2 Beads

Abstract

Mesoporous metal oxide films have been usually adopted for solid-state dye sensitized solar cells (DSC); however difficulty in pore filling has been an issue in such nanoparticulate films Beads structure were reported have higher surface area and to be better in electron transport than commercial nanoparticles P25 These characteristics makes anatase TiO2 beads are capable to enhance the dye loading leading to light absorbance and overall cell efficiency Mesoporous anatase TiO2 beads were prepared over two steps including sol-gel and hydrothermal processes In other hand the CH3NH3PbI3 perovskite material shows a direct bandgap and wide range of light absorption covering the visible to near-IR spectrum as well as high extinction coefficient that would be very advantageous as a sensitizer Here anatase TiO2 beads were used for the fabrication of solid-state perovskite sensitized solar cell which then acts as an electron transporting layer Nanoparticle TiO2 (commercial P25) were also used as a comparison The perovskite sensitizer then were deposited onto the electron transporting layer either by sequential or VASP techniques The crystal structure and the morphology of the resulting beads powders were examined using x-ray diffraction and scanning electron microscope respectively The surface area of final beads product were measured using BET analysis Finally the device were evaluated using solar cell characterization

Date of Award	2014 Aug 15
Original language	English
Supervisor	Jyh-Ming Ting (Supervisor)