Modulation of Characteristics of Si Solar Cells by Luminescence-Downshifting Zn-Based Nanoparticles with Mn doped

We deposit Mn-doped Zn-based nanoparticles (NPs) on Si solar cells using the drop casting and layer-by-layer methods and measure their current-voltage and spectral response characteristics. The solar cells covered by the NPs show higher conversion efficiencies due to the interference of the layered NPs. We also observe enhancement of internal quantum efficiency (IQE) of Si cells, which is due to the luminescence downshifting (LDS) of deposited NPs. A model for describing effects of LDS on IQE is also provided.