Multi–Resonant Mie Resonator Arrays for Broadband Light Trapping in Ultrathin c–Si Solar Cells

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

doi:10.1002/adma.202210941

Multi–Resonant Mie Resonator Arrays for Broadband Light Trapping in Ultrathin c–Si Solar Cells

Journal Article · Tue May 02 00:00:00 EDT 2023 · Advanced Materials

DOI:https://doi.org/10.1002/adma.202210941· OSTI ID:2417673

Lee, Nayeun ^[1]; Xue, Muyu ^[2]; Hong, Jiho ^[2]; ^[3]; ^[2]

Stanford Univ., CA (United States); OSTI
Stanford Univ., CA (United States)
Stanford Univ., CA (United States); Univ. of Amsterdam (Netherlands)

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. Finally, the presented design principles are applicable to a wide range of solar cells.

View Accepted Manuscript (DOE)

Research Organization:: Stanford Univ., CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-07ER46426

OSTI ID:: 2417673

Journal Information:: Advanced Materials, Journal Name: Advanced Materials Journal Issue: 29 Vol. 35; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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14 SOLAR ENERGY
36 MATERIALS SCIENCE
Antireflection coatings
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Mie resonators
Physics
Science & Technology - Other Topics
Ultrathin solar cells

Multi–Resonant Mie Resonator Arrays for Broadband Light Trapping in Ultrathin c–Si Solar Cells

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