Simulation and analysis of the performances of a thin plasmonic-based perovskite absorber by subtracting the parasitic absorption of nano-cylinders

摘要

Optical design and management are the most important to demonstrate the full potential of thin-film perovskite absorbers. The main goal of this research work is to evaluate the parasitic absorption of nano-particles inside the perovskite absorber. Here, the cylindrical shape nanoparticles are used to manage the incident light inside the perovskite solar cell. Thin-film perovskite absorbers have good absorption in the visible region. Since the small size nanoparticles scatter incident light in the forward direction, so using them on the top side is beneficial. For the rear side, large nanoparticles are used because they scatter in the backward direction. It is showed that the use of nanoparticles in the top side has a weak effect on absorption. So, we used nano-cylinders on the rear side to promote the optical response in the near-infrared region. Comprehensive finite-difference time-domain simulations are done to design optimized nanostructures. It is investigated that optical absorption inside the nano-cylinders occurs at the near-infrared. The parasitic absorption of them was subtracted from total absorption to identify the net absorption of the perovskite layer. For instance, for a 200 nm absorber, the photocurrent is increased from 17.71 mA/cm~2 (without nanoparticle) to 19.67 mA/cm~2. Also, it is investigated that the absorption inside the Al nanoparticles is less than Ag nanoparticles. The founding of this work is helpful to design and produce a thin-film perovskite solar cell.