Abstract
This study presents a novel approach to enhancing the optical performance of Y2O3:Ho3+ downshifting luminescent coatings by incorporating hollow silica nanoparticles (HSN) synthesized via the Stöber method. By embedding varying amounts of HSN into the Y2O3:Ho3+ matrix and applying the mixture onto quartz substrates through spin coating, the researchers achieved notable improvements in emission characteristics and film morphology. Structural and surface analyses confirmed the successful integration of HSN and the development of surface porosity. Most significantly, the modified coatings demonstrated enhanced green emission under 448 nm excitation and improved the power conversion efficiency when applied to commercial crystalline silicon (c-Si) solar cells. These findings highlight the potential of HSN-enhanced Y2O3:Ho3+ coatings as a practical and efficient strategy for boosting solar cell performance, marking a meaningful advancement in luminescent material design for photovoltaic applications.