Can solar cell efficiency be boosted by manipulating light? This article proposes a method to realize multiple electron–hole pair generation per incident photon. This study explores a method for improving solar cell efficiencies by down-conversion of high-energy photons. It proposes using a luminescence converter to transform high-energy photons into two or more lower energy photons, reducing energy losses due to thermalization. The theoretical efficiency limit of this system for nonconcentrated sunlight is determined as a function of the solar cell’s band gap using detailed balance calculations. Detailed balance calculations determine the theoretical efficiency limit of this system for nonconcentrated sunlight. This provides a theoretical basis for optimizing the design of such systems. The study analyzes the potential for achieving higher conversion efficiencies. Ultimately, this paper offers a promising approach for enhancing solar cell performance, suggesting that down-conversion techniques can significantly improve energy conversion efficiencies. By providing a theoretical framework for optimizing these systems, the study paves the way for future research and development in solar energy technology.
Published in the Journal of Applied Physics, this paper aligns with the journal's focus on exploring innovative approaches to improving the efficiency of energy technologies. By investigating the use of down-conversion techniques to enhance solar cell performance, it contributes to the journal's ongoing exploration of advanced materials and devices for energy applications.