Broadband reflectance reduction for wafer bonded III-V//Si tandem cell using polydimethylsiloxane - replicated surface texturing

Chuqi Yi, Fa-Jun Ma, Hidenori Mizuno, Kikuo Makita, Takeyoshi Sugaya, Hidetaka Takato, Hamid Mehrvarz, Stephen Bremner, Anita Ho-Baillie

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

Wafer bonded, silicon based multi-junction solar cells are a promising approach for achieving high efficiencies with relatively low cost. Due to poor long wavelength light absorption in silicon, however, the cell efficiency is limited by current mismatch. In this work, for the first time, an external surface texturing is attached onto a GaInP/GaAs//Si wafer bonded solar cell using Polydimethylsiloxane layers with surface geometries replicated from various pyramidally-textured silicon wafers. With the improved light trapping, the AM1.5G spectrum weighted average reflected current density for the cell is reduced by 3.72 mA/cm2, within which 1.81 mA/cm2 is reduced at long wavelength range that can boost the current generation in silicon bottom cell.

Original languageEnglish
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC)
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages271-274
Number of pages4
ISBN (Electronic)9781538685297
ISBN (Print)9781538685303
DOIs
Publication statusPublished - 2018
Externally publishedYes
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: 10 Jun 201815 Jun 2018

Publication series

Name
ISSN (Print)0160-8371

Conference

Conference7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
CountryUnited States
CityWaikoloa Village
Period10/06/1815/06/18

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