Double Layer and High-Low Refractive Index Stacks Antireflecting Coatings for Multijunction Perovskite-on-Silicon Solar Cells

• Published in: IEEE journal of photovoltaics Vol. 14; no. 1; pp. 93 - 98
• Main Authors: Hou, GuoJiao, Sanchez-Perez, Clara, Rey-Stolle, Ignacio
• Format: Journal Article
• Language: English
• Published: Piscataway IEEE 01.01.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aluminum oxide; Antireflection coating (ARC); Antireflection coatings; Broadband; Circuit design; high–low refractive index stacks; II-VI semiconductor materials; Magnesium fluorides; Monolayers; multijunction solar cell; Optical materials; perovskite solar cells; Perovskites; Photovoltaic cells; Refractive index; Refractivity; Short circuit currents; Silicon; Solar cells; Zinc compounds; Zinc sulfide
• ISSN: 2156-3381; 2156-3403
• DOI: 10.1109/JPHOTOV.2023.3323758

The progress toward high-efficiency and low-cost photovoltaics is currently driven by the development of multijunction perovskite-on-silicon solar cells. In many cases, these devices use relatively simple single-layer antireflection coatings formed by a low-index optical material. In this article, we analyze the potential of improving such antireflecting coatings (ARCs) using two optical materials. To this end, we assess four material combinations, namely, [LiF/ZnS], [MgF 2 /ZnS], [LiF/Al 2 O 3 ], and [MgF 2 /Al 2 O 3 ], and determine under which conditions ARCs more complex than the single-layer (as the double-layer) provide any advantages. Finally, we introduce the high-low refractive index stack methodology for the design of broadband antireflection coatings that can produce net short-circuit current density gains in all material combinations studied, with maximum increments of 1.7%.