基于GLAD技术的高效IMM3J太阳能电池四层减反射涂层

A quasi-gradient refractive index quadruple-layer antireflection coating (QLARC) nano-MgF 2 /ZnS/MgF 2 /ZnS was designed for inverted metamorphic triple junction (IMM3J) solar cells, with optimization and simulation using the Essential Macleod. The top layer nanoporous MgF 2 (nano-MgF 2 ) film was fabricated utilizing the glancing angle deposition (GLAD) technique, achieving tailored refractive indices from 1.39 to 1.20 through controlling deposition angle ( θ α = 24°-89°). The photovoltaic performance of quasi-gradient QLARC was compared with that of a conventional double-layer antireflection coating (DLARC). Both DLARC and QLARC reduced the solar spectrum-weighted average reflectance (SSWAR) of IMM3J solar cells by 23.46% and 25.45%, respectively, in the wavelength range of 300–1300 nm. By reducing optical loss, both DLARC and QLARC enhanced the external quantum efficiency (EQE) of IMM3J solar cells, thus increasing the short-circuit current (J sc ) by 29.4% and 32.9%, respectively, compared to uncoated solar cells (AM0, 1-sun). The IMM3J solar cell with QLARC achieves a power conversion efficiency (PCE) of 31.8%, which is higher than that of the cells without ARC (23.7%) and with DLARC (30.6%). In comparison with DLARC, the nano-MgF 2 /ZnS/MgF 2 /ZnS demonstrated better broadband antireflection properties and enhanced electrical performance in IMM3J solar cells, as confirmed by simulation and experiment.