Development of 40 μm thin flexible silicon heterojunction solar cells

Pradeep Balaji, William J. Dauksher, Stuart Bowden, André Augusto

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

2 Scopus citations

Abstract

Large-scale production of flexible solar cells is paving the way to portable, low cost power devices. Whereas energy conversion of commercial devices is in the range of 5-15 %, our goal is to manufacture low cost, flexible solar cells with efficiencies over 20%. In this paper we present our latest development on flexible silicon heterojunction solar cells using 40 μm thin silicon wafers. Currently, sputtering induces surface damage which leads to an open circuit voltage drop of 15-20 mV when compared to implied open circuit voltages. The degradation of minority carrier lifetime after sputtering can be mitigated, from a maximum of 38% down to 17%, through a 70% reduction in the DC plasma power, thereby increasing the reliability of the process. We experimentally demonstrate average minority carrier lifetimes over 1300 μs and iVOC over 760 mV for 40 μm thin wafers.

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.
Pages2100-2103
Number of pages4
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

  • carrier lifetime
  • flexible cells
  • ITO thin film
  • SHJ 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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  • Cite this

    Balaji, P., Dauksher, W. J., Bowden, S., & Augusto, A. (2018). Development of 40 μm thin flexible silicon heterojunction solar cells. 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. 2100-2103). [8547385] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2018.8547385