Design of deterministic light-trapping structures for thin silicon heterojunction solar cells | Zendy

Samia Ahmed Nadi | Zendy; Karsten Bittkau | Zendy; Florian Lentz | Zendy; Kaining Ding | Zendy; Uwe Rau | Zendy

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Design of deterministic light-trapping structures for thin silicon heterojunction solar cells

Author(s) -

Samia Ahmed Nadi,

Karsten Bittkau,

Florian Lentz,

Kaining Ding,

Uwe Rau

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.417848

Subject(s) - wafer , optics , materials science , photocurrent , optoelectronics , heterojunction , trapping , thin film , wavelength , silicon , crystalline silicon , absorptance , solar cell , physics , reflectivity , nanotechnology , ecology , biology

We optically designed and investigated two deterministic light-trapping concepts named "Hutong" (wafer thickness dependent, patch-like arrangement of "V" grooves with alternating orientations) and "VOSTBAT" (one directional "V" grooves at the front and saw-tooth like structures at the back) for the application in emerging thin silicon heterojunction (SHJ) solar cells. Calculated photocurrent density (J ph ) (by weighting the spectrally resolved absorptance with AM1.5g spectrum and integrating over the wavelength) showed that both the Hutong and VOSTBAT structures exceed the Lambertian reference and achieved J ph of 41.72 mA/cm 2 and 41.86 mA/cm 2 , respectively, on 60 µm thin wafers in the case of directional, normal incidence.

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