Abstract

This paper investigates the enhancement of quantum dot solar cell (QDSC) efficiency through the synergistic combination of plasmonic and excitonic coupling, along with optimized nanostructure geometries. We present a comprehensive numerical study using COMSOL Multiphysics to model and analyze the optical and electrical properties of QDSCs incorporating gold nanoparticles (AuNPs) and various QD materials. The simulations demonstrate that strategically placed AuNPs induce localized surface plasmon resonance (LSPR), significantly enhancing light absorption within the QD active layer. Furthermore, we explore the impact of exciton coupling between QDs and the plasmonic field, leading to improved charge separation and collection. The study also examines the influence of different nanostructure geometries, including AuNP size, shape, and spacing, on the overall QDSC performance. Our results indicate that a carefully designed hybrid plasmonic-excitonic QDSC can achieve a substantial increase in power conversion efficiency compared to conventional QDSCs. The findings offer valuable insights for the development of next-generation, high-performance solar cells based on quantum dot technology.