Optical Engineering of a Gradient Antireflective Coating to Boost the Current Density in Efficient Perovskite Solar Cells

ACS Applied Energy Materials 2026

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Authors: Sonia Rani, Francesco Toniolo, Silvia Cavalli, Matteo Degani, Laura Ghidoni, Marco Faverzani, Alessandro Girella, Lucio Claudio Andreani, Paolo Biagioni, Angelo Taglietti, Chiara Milanese, Giulia Grancini
DOI: 10.1021/acsaem.5c03031
Cited by: 3
References: 25

Abstract

Antireflection coatings (ARCs) are a well-established yet often underutilized strategy for enhancing light management in perovskite solar cells. In this study, we report on a scalable and effective ARC solution based on engineering a bilayer architecture composed of a planar magnesium fluoride (MgF 2 ) and a top MgF 2 layer deposited at tilted angles using low-energy vapor deposition. The tilted deposition induces a gradient in the refractive index between the two layers, enabling superior optical impedance matching at the air/device interface. Optical constants of both planar and tilted MgF 2 layers were extracted via spectroscopic ellipsometry and incorporated into optical simulations to optimize the layer thicknesses. Excellent agreement between modeling and experimental data was achieved (error

Fields of Study & Subjects

Perovskite Materials and Applications Optical Coatings and Gratings TiO2 Photocatalysis and Solar Cells

Publication details

Journal / source
ACS Applied Energy Materials
Publisher
American Chemical Society (ACS)
Volume
9
Issue
3
Pages
1346–1353
Publication date
21 January 2026
Language
EN