Exploring the Role of Nanomaterials in Improving Solar Cell Efficiency

Abstract

Despite the fact that solar PV technology plays a key role in the global shift to renewable energy, the power conversion efficiency (PCE) of traditional silicon-based PV cells is limited by inherent optical and electronic losses, including the Shockley–Queisser limit. In the last ten years, the use of light trapping, light absorption, charge separation and charge transport nanomaterials, such as quantum dots, perovskite nanocrystals, carbon nanotubes, graphene, plasmonic nanoparticles and nanostructured metal oxides, have been identified as a promising way to address these challenges. In this paper, the potential of utilizing nanomaterials to enhance solar cell efficiency is investigated by critically reviewing and analyzing secondary information obtained from peer-reviewed journals and publications from 2018 to 2025. The paper compares efficiency data from three types of quantum-dot sensitised solar cell, perovskite solar cell, dye-sensitised solar cell, and carbon-nanomaterial based solar cell, and puts these in perspective with the efficiency data for conventional silicon solar cells. Results suggest that the incorporation of nanomaterials has led to measurable improvements in efficiency over the years, with perovskite solar cells increasing from less than four percent in power conversion efficiency to more than twenty-five percent in just about a decade, and has imposed novel challenges in long-term stability, environmental toxicity and scalable manufacturing. The paper notes that nanomaterials hold the promise of a truly promising but still developing route towards next-generation PV, though further research is needed in the areas of durability, encapsulation, and cost-effective fabrication that will make it viable to enter into more widespread commercialization.