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Multi‐Resonant Mie Resonator Arrays for Broadband Light Trapping in Ultrathin c‐Si Solar Cells by Nayeun Lee; Muyu Xue; Jiho Hong; Jorik van de Groep; Mark Luitzen Brongersma is a Engineering article available to read on EtoBox.

What is Multi‐Resonant Mie Resonator Arrays for Broadband Light Trapping in Ultrathin c‐Si Solar Cells about?

## Abstract Effective photon management is critical to realize high power conversion efficiencies for thin crystalline silicon (c‐Si) solar cells. Standard few‐100‐μm‐thick bulk cells achieve light trapping with macroscopic surface textures covered by thin, continuous antireflection coatings. Such sizeable textures are challenging to implement on ultrathin cells. Here, it is illustrated how nanoscale Mie‐resonator‐arrays with a bimodal size distribution support multiple resonances that can work in concert to achieve simultaneous antireflection and light‐trapping across the broad solar spectrum. The effectiveness of these light‐trapping antireflection coatings is experimentally demonstrated on a 2.8 μm‐thick c‐Si solar cell. The measured short‐circuit current and corresponding power conversion efficiency are notably improved, achieving efficiencies as high as 11.2%. Measurements of the saturation current density on completed cells indicate that thermal oxides can effectively limit surface recombination. The presented design principles are applicable to a wide range of solar cells.

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Author

Nayeun Lee; Muyu Xue; Jiho Hong; Jorik van de Groep; Mark Luitzen Brongersma

Publisher

Wiley

Published

2023

Language

EN

Field

Engineering (Physical Sciences)