Quantitative spectroscopic study of ZnO nanoparticles with intentionally introduced defects for photovoltaic applications
Résumé
In the present communication, we propose the application of ZnO nanoparticles as down-shifters for the enhancement of the solar cell’s spectral response. Nanoparticles permit to achieve a high concentration of the intermediate energy levels in the bandgap, necessary for an efficient energy down-shifting and at the same time, they can act as an antireflective layer. We first show that the synthesis conditions can be used to control and enhance the visible luminescence of ZnO NPs and even achieve high quantum photoluminescent yield. The subsequent use of these nanoparticles as a down-shifting material for photovoltaic cells is proposed.