2023.8 由硕士研究生李堂明完成的研究论文”Tunable terahertz graphene metamaterial optical switches and sensors based on plasma-induced transparency”被《Optical Materials》录用！祝贺！

Abstract

Improving the solar cell's ability to capture solar photons and enhancing its absorption of light have a significant impact on increasing the photoelectric conversion efficiency (PCE) of solar cells. In this study, we propose to embed a layer of light-trapping structure (LTS) utilizing Ti nanoparticles and their oxide TiO₂ periodically arranged in the window layer of GaAs thin-film solar cells. This structure improves the light absorption efficiency by increasing the optical range and surface plasmon resonance of light inside the cell, which in turn improves the PCE of the solar cell. Simulation results show that the GaAs solar cell proposed in this paper achieves an average absorptivity of 94.99% in the visible and near-infrared wavelength bands, and the PCE reaches 31.77%, which is close to the Shockley-Queisser limit level of the single-junction solar cell. And it realizes the characteristic of perfect absorption in the wavelength range of 555–800 nm. The cell structure proposed in this study is characterized by high bandwidth perfect absorption and high PCE, which is insensitive to the angle of incidence, and provides a new idea for the design of new high-efficiency thin-film solar cells.