Realization of GaInP/Si dual-junction solar cells with 29.8% 1-sun efficiency

Essig, Stephanie; Steiner, Myles A.; Allebe, Christophe; Geisz, John F.; Paviet-Salomon, Bertrand; Ward, Scott; Descoeudres, Antoine; LaSalvia, Vincenzo; Barraud, Loris; Badel, Nicolas; Faes, Antonin; Levrat, Jacques; Despeisse, Matthieu; Ballif, Christophe; Stradins, Paul; Young, David L.

doi:10.1109/JPHOTOV.2016.2549746

Realization of GaInP/Si dual-junction solar cells with 29.8% 1-sun efficiency

Journal Article · Wed Apr 27 00:00:00 EDT 2016 · IEEE Journal of Photovoltaics

DOI:https://doi.org/10.1109/JPHOTOV.2016.2549746· OSTI ID:1329999

Essig, Stephanie ^[1]; Steiner, Myles A. ^[1]; Allebe, Christophe ^[2]; Geisz, John F. ^[1]; Paviet-Salomon, Bertrand ^[2]; Ward, Scott ^[1]; Descoeudres, Antoine ^[2]; LaSalvia, Vincenzo ^[1]; Barraud, Loris ^[2]; Badel, Nicolas ^[2]; Faes, Antonin ^[2]; Levrat, Jacques ^[2]; Despeisse, Matthieu ^[2]; Ballif, Christophe ^[2]; Stradins, Paul ^[1]; Young, David L. ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Swiss Center for Electronics and Microtechnology (CSEM), Neuchatel (Switzerland)

Combining a Si solar cell with a high-bandgap top cell reduces the thermalization losses in the short wavelength and enables theoretical 1-sun efficiencies far over 30%. We have investigated the fabrication and optimization of Si-based tandem solar cells with 1.8-eV rear-heterojunction GaInP top cells. The III-V and Si heterojunction subcells were fabricated separately and joined by mechanical stacking using electrically insulating optically transparent interlayers. Our GaInP/Si dual-junction solar cells have achieved a certified cumulative 1-sun efficiency of 29.8% ± 0.6% (AM1.5g) in four-terminal operation conditions, which exceeds the record 1-sun efficiencies achieved with both III-V and Si single-junction solar cells. Furthermore, the effect of luminescent coupling between the subcells has been investigated, and optical losses in the solar cell structure have been addressed.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1329999

Report Number(s):: NREL/JA--5J00-65653

Journal Information:: IEEE Journal of Photovoltaics, Journal Name: IEEE Journal of Photovoltaics Journal Issue: 4 Vol. 6; ISSN 2156-3381

Publisher:: IEEECopyright Statement

Country of Publication:: United States

Language:: English

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