15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates

Michelle Vaisman, Shizhao Fan, Kevin Nay Yaung, Emmett Perl, Diego Martín-Martín, Zhengshan J. Yu, Mehdi Leilaeioun, Zachary C. Holman, Minjoo L. Lee

Research output: Research - peer-reviewArticle

Abstract

As single-junction Si solar cells approach their practical efficiency limits, a new pathway is necessary to increase efficiency in order to realize more cost-effective photovoltaics. Integrating III-V cells onto Si in a multijunction architecture is a promising approach that can achieve high efficiency while leveraging the infrastructure already in place for Si and III-V technology. In this Letter, we demonstrate a record 15.3%-efficient 1.7 eV GaAsP top cell on GaP/Si, enabled by recent advances in material quality in conjunction with an improved device design and a high-performance antireflection coating. We further present a separate Si bottom cell with a 1.7 eV GaAsP optical filter to absorb most of the visible light with an efficiency of 6.3%, showing the feasibility of monolithic III-V/Si tandems with >20% efficiency. Through spectral efficiency analysis, we compare our results to previously published GaAsP and Si devices, projecting tandem GaAsP/Si efficiencies of up to 25.6% based on current state-of-the-art individual subcells. With the aid of modeling, we further illustrate a realistic path toward 30% GaAsP/Si tandems for high-efficiency, monolithically integrated photovoltaics.

LanguageEnglish (US)
Pages1911-1918
Number of pages8
JournalACS Energy Letters
Volume2
Issue number8
DOIs
StatePublished - Aug 11 2017

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Solar cells
Antireflection coatings
Optical filters
Costs

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Energy Engineering and Power Technology
  • Fuel Technology
  • Renewable Energy, Sustainability and the Environment
  • Materials Chemistry

Cite this

Vaisman, M., Fan, S., Yaung, K. N., Perl, E., Martín-Martín, D., Yu, Z. J., ... Lee, M. L. (2017). 15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates. ACS Energy Letters, 2(8), 1911-1918. DOI: 10.1021/acsenergylett.7b00538

15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates. / Vaisman, Michelle; Fan, Shizhao; Yaung, Kevin Nay; Perl, Emmett; Martín-Martín, Diego; Yu, Zhengshan J.; Leilaeioun, Mehdi; Holman, Zachary C.; Lee, Minjoo L.

In: ACS Energy Letters, Vol. 2, No. 8, 11.08.2017, p. 1911-1918.

Research output: Research - peer-reviewArticle

Vaisman, M, Fan, S, Yaung, KN, Perl, E, Martín-Martín, D, Yu, ZJ, Leilaeioun, M, Holman, ZC & Lee, ML 2017, '15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates' ACS Energy Letters, vol 2, no. 8, pp. 1911-1918. DOI: 10.1021/acsenergylett.7b00538
Vaisman M, Fan S, Yaung KN, Perl E, Martín-Martín D, Yu ZJ et al. 15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates. ACS Energy Letters. 2017 Aug 11;2(8):1911-1918. Available from, DOI: 10.1021/acsenergylett.7b00538
Vaisman, Michelle ; Fan, Shizhao ; Yaung, Kevin Nay ; Perl, Emmett ; Martín-Martín, Diego ; Yu, Zhengshan J. ; Leilaeioun, Mehdi ; Holman, Zachary C. ; Lee, Minjoo L./ 15.3%-Efficient GaAsP Solar Cells on GaP/Si Templates. In: ACS Energy Letters. 2017 ; Vol. 2, No. 8. pp. 1911-1918
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