19.5%-Efficient Back-Contact Silicon Heterojunction Solar Cell with Self Aligned Metallization Using Multilayer Aluminum Foils

David H. Levy, David E. Carlson, Kathryn C. Fisher, Joe V. Carpenter, Zachary Holman

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

2 Scopus citations

Abstract

We present advances in a back-contact, back-junction metallization strategy using preformed multilayers of aluminum foil with a polymer insulator. The low-cost multilayer foils can be conductively bonded to substrates using nonconducting adhesives. The properties of this bonding process are discussed. We also demonstrate different cell structures based on multilayer foils. One approach leverages features of the multilayer foil to produce a self-aligned base contact, leading to a process with only a single alignment step. A champion silicon heterojunction cell with this foil metallization achieved 19.5% efficiency. We further show first results on a completely alignment-free back contact process enabled by multilayer foil metallization.

Original languageEnglish (US)
Title of host publication2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages2667-2672
Number of pages6
ISBN (Electronic)9781538685297
DOIs
StatePublished - Nov 26 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: Jun 10 2018Jun 15 2018

Other

Other7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018
CountryUnited States
CityWaikoloa Village
Period6/10/186/15/18

Keywords

  • Contacts
  • metallization
  • photovoltaic cells
  • silicon

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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    Levy, D. H., Carlson, D. E., Fisher, K. C., Carpenter, J. V., & Holman, Z. (2018). 19.5%-Efficient Back-Contact Silicon Heterojunction Solar Cell with Self Aligned Metallization Using Multilayer Aluminum Foils. In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC (pp. 2667-2672). [8548118] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2018.8548118