Hafnium and Erbium Codoped ZnO Thin Films as Anode Material and Spectral Modificater for Solar Cells Applications

The spectral mismatch between solar cells and incident radiation is a fundamental factor limiting their efficiencies. There are materials and luminescent processes which can modify the incident sunlight's properties to better suit the cell's optimal absorption regions. Developing new structures or optical devices to improve the trapping of light within solar cells is a real challenge. This work is part of the theme of increasing the efficiency of solar cells by relying on techniques offered by optical engineering. Our aim is to study the visible photoluminescence spectra after Ultraviolet (UV) excitation, of hafnium and erbium codoped zinc oxide, in order to modify the solar spectrum and adapt it to the solar cell, and consequently to enhance its efficiency. In addition we will study the use of these films as photovoltaic anode.