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Approaching Perfect Light Incoupling in Perovskite and Silicon Thin Film Solar Cells by Moth Eye Surface Textures
Author(s) -
Qarony Wayesh,
Hossain Mohammad Ismail,
Dewan Rahul,
Fischer Stefan,
MeyerRochow V Benno,
Salleo Alberto,
Knipp Dietmar,
Tsang Yuen Hong
Publication year - 2018
Publication title -
advanced theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.068
H-Index - 17
ISSN - 2513-0390
DOI - 10.1002/adts.201800030
Subject(s) - materials science , optoelectronics , perovskite (structure) , amorphous silicon , silicon , refractive index , solar cell , crystalline silicon , optics , thin film , plasmonic solar cell , amorphous solid , texture (cosmology) , quantum dot solar cell , polymer solar cell , nanotechnology , chemistry , computer science , physics , crystallography , artificial intelligence , image (mathematics)
Solar cells with increased short‐circuit current density and energy conversion efficiency can be realized by integrating moth eye textures in the design of perovskite and amorphous silicon thin film solar cells. Broadband light incoupling in solar cells can be achieved by using hexagonally arranged arrays of nipples or domes with parabolically shaped surface profiles. The moth eye surface texture represents a refractive index grating that allows for an efficient incoupling of light in the solar cell while minimizing reflection losses. The light incoupling is studied for perovskite and amorphous silicon solar cells. Perovskite has a rather low refractive index of ≈2.5, while amorphous silicon exhibits a refractive index of ≈4.5 comparable to that of crystalline silicon. Due to largely different refractive indices, different device designs must be selected to allow for an efficient light incoupling in the solar cell. 3D finite‐difference time‐domain simulations are used for the optical modeling. Design guidelines are provided on how to realize perovskite and silicon thin film solar cells with high quantum efficiency and short‐circuit current by using moth eye textures.