All‐Angle Invisibility Cloaking of Contact Fingers on Solar Cells by Refractive Free‐Form Surfaces
Source abstract
Abstract
This work demonstrates a performance improvement of state‐of‐the‐art silicon solar cells by cloaking their metal contact fingers. The cloaking free‐form surfaces are fabricated on silicon heterojunction solar cells using direct laser writing of polymers and subsequent soft imprinting. Cloaking performance is determined experimentally by measuring spatially resolved and angle‐resolved current generation and the spectral response of the cell. The short‐circuit current density of the cell increases by 7.3%; its power‐conversion efficiency is enhanced by 9.3%. Overcompensation of the shadowing loss is found to be caused by improved light‐gathering and light‐trapping in the polymer layer. The experimental findings are in good agreement to ray‐tracing simulations.
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Research context
OpenAlex topics: Near-Field Optical Microscopy · Photonic Crystals and Applications · Photonic and Optical Devices
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Nanotechnology Karlsruhe Institute of Technology 76021 Karlsruhe Germany
Institute of Applied Physics Karlsruhe Institute of Technology 76128 Karlsruhe Germany
Institute of Microstructure Technology Karlsruhe Institute of Technology 76021 Karlsruhe Germany
Institut für Energie und Klimaforschung (IEK‐5) Forschungszentrum Jülich GmbH 52425 Jülich Germany
Light Technology Institute Karlsruhe Institute of Technology 76021 Karlsruhe Germany
Funding
Helmholtz-Gemeinschaft · Karlsruher Institut für Technologie
References (20)
Show source-provided references
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