Potential of Chemical Rounding for the Performance Enhancement of a Monolithic Perovskite/Bifacial N-PERT Si Tandem Cell

Hyunju Lee, Inseol Song, Sang Won Lee, Soo Hyun Bae, Ji Yeon Hyun, Yoonmook Kang, Haeseok Lee, Donghwan Kim, Atsushi Ogura, Yoshio Ohshita

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

Abstract

We have investigated the effects of chemical rounding on the performance of bifacial n-PERT Si cells with a random-pyramid textured p + -emitter. From experimental results, we found that solar-weighted reflectanceR SW of pyramid textured p + -emitters passivated with an AlOx/SiNx:H stack increases and short circuit current densityJ sc of bifacial n-PERT Si cells with an AlOx/SiNx:H stack-passivated textured p + -emitter consequently decreases as a function of chemical rounding time. However, the loss inJ sc is fully offset by the increased fill factor FF, and the efficiency of the 200-sec-rounded cells is consequently enhanced, compared to the non-rounded cells. In addition, the deposition of an indium tin oxide layer on the non-rounded and rounded p+- emitters passivated with an AlOx/SiNx:H stack can reduce reflectance largely in the near-infrared region. Based on the experimental results, although we would need further studies, it could be expected that cell efficiency of a bifacial n-PERT Si bottom cell and its monolithic tandem cell with a perovskite top cell would be improved without additional complicated and costly processes if chemical rounding and boron doping processes are properly optimized.

Original languageEnglish
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.
Pages2039-2044
Number of pages6
ISBN (Electronic)9781538685297
DOIs
Publication statusPublished - 26 Nov 2018
Event7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - Waikoloa Village, United States
Duration: 10 Jun 201815 Jun 2018

Publication series

Name2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Conference

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

Keywords

  • AlOx passivation
  • Chemical rounding
  • bifacial n-PERT Si solar cell
  • perovskite/silicon tandem cell
  • pyramid textured p+-emitter

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  • Cite this

    Lee, H., Song, I., Lee, S. W., Bae, S. H., Hyun, J. Y., Kang, Y., Lee, H., Kim, D., Ogura, A., & Ohshita, Y. (2018). Potential of Chemical Rounding for the Performance Enhancement of a Monolithic Perovskite/Bifacial N-PERT Si Tandem Cell. 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. 2039-2044). [8547592] (2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PVSC.2018.8547592