Fabrication of quasi-random photonic crystals for ultrathin solar cells

Quasi-random structures for light management present an intermediate ordering between a completely random rough surface and a perfect ordered photonic crystal. They are attractive for broadband applications due to their power spectral density. This makes them excellent candidates for photovoltaic ap...

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Bibliographic Details
Published in2021 IEEE 48th Photovoltaic Specialists Conference (PVSC) pp. 1193 - 1194
Main Authors Buencuerpo, Jeronimo, Saenz, Theresa E., Theingi, San, Young, Michelle, Geisz, John F., Warren, Emily L., Steiner, Myles A., Tamboli, Adele C.
Format Conference Proceeding
LanguageEnglish
Published IEEE 20.06.2021
Subjects
Fabrication
GaAs
III-V
photonic crystal
Photonic crystals
Photovoltaic systems
quasirandom
Rough surfaces
Self-assembly
Surface roughness
ultrathin
Wet etching
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Summary:Quasi-random structures for light management present an intermediate ordering between a completely random rough surface and a perfect ordered photonic crystal. They are attractive for broadband applications due to their power spectral density. This makes them excellent candidates for photovoltaic applications. Here we present preliminary fabrication results creating quasi-random structures using a self-assembly approach based on polymer blends and wet etching. We are able to create patterns with average lattice constant of five to two microns. This structure is proposed to be used as a rear patterning layer for ultrathin GaAs cells for better sustainability and radiation- hard devices.
DOI:10.1109/PVSC43889.2021.9518404