Optical optimization enhances energy generation in silicon photovoltaic systems under LED light, suggesting viability for commercial use.
Indoor environments offer a unique opportunity for photon recycling using LED-based illumination, particularly to address energy limitations of solar photovoltaic (PV) systems during nighttime or in low-light conditions. This study presents an optical and electrical performance evaluation of silicon-based photovoltaic (SPV) panels operating under controlled indoor LED lighting. Despite the low irradiance (~1.4 mW/cm²), significant power output was achieved through engineered panel configurations and optimized light–panel distance. A series-connected SPV array demonstrated a power conversion efficiency (PCE) of 31%, approaching the theoretical limit for silicon PVs under solar spectrum. Photon recycling efficiency reached 37.23%, with cumulative energy outputs of 0.19 kWh (series) and 0.32 kWh (parallel) over 20 hours of operation. The optical design considerations - including spectral compatibility between LEDs and silicon bandgap, angular incidence, and light concentration - were critical to enhancing system performance. A techno-economic projection for integration in a high-rise commercial setting (Willis Tower) estimates annual energy generation of 1.63 GWh and savings over $325,000. These findings demonstrate the viability of optically optimized indoor PV systems as a complementary solution to conventional solar panels, enabling energy harvesting from ambient lighting in commercial and high-density infrastructure.
No takes yet. Share an insight, caveat, or question.
Katepalli et al. (2025) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: