Photovoltaic performance enhancement of plasmonics silicon solar cells using indium nanoparticles embedded in Al2O3/TiO2 layer structure

The photovoltaic performance enhancement of silicon solar cells depositing indium nanoparticles (In NPs) on TiO₂ layer and capping an Al₂O₃ layer was demonstrated. The impressive performance enhanced was attributed to the In NPs broadband light scattering based on Al₂O₃/TiO₂ antireflection. The optical reflectance, photovoltaic current-voltage, and external quantum efficiency were measured and compared with various thickness of TiO₂ layer. The efficiency enhancement of 54.5% (from 10.96% to 16.93%) was obtained when the cell with In NPs embedded in the Al₂O₃ (65-nm)/TiO₂ (20-nm) structure.