Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells After Exposure to Humid Air
Watthage, Suneth C.
De Wolf, Stefaan
Phillips, Adam B.
Ellingson, Randy J.
Heben, Michael J.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
Materials Science and Engineering Program
KAUST Solar Center (KSC)
KAUST Solar Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
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AbstractMonolithically integrated two-terminal perovskite/Si tandem solar cells promise to achieve high power conversion efficiency. However, there is a concern that the stability of the perovskite top cell will limit the long-term performance of tandem devices. To investigate the impact of perovskite cell degradation on the photocurrent generation and collection in the individual subcells, we employed light beam induced current mapping to spatially resolve the photocurrent under controlled humidity conditions. The evolution of the device behavior is consistent with the formation of an optically transparent hydrated perovskite phase that allows the bottom Si cell to continue to generate photocurrent at the probing wavelength (532 nm). Additional measurements were performed on perovskite thin films on glass substrates to verify the interpretation.
CitationSong Z, Werner J, Watthage SC, Sahli F, Shrestha N, et al. (2017) Imaging the Spatial Evolution of Degradation in Perovskite/Si Tandem Solar Cells After Exposure to Humid Air. IEEE Journal of Photovoltaics: 1–6. Available: http://dx.doi.org/10.1109/JPHOTOV.2017.2748720.
SponsorsThis work was supported in part by the Wright Center Endowment for Photovoltaics Innovation and Commercialization, in part by the U.S. National Science Foundation (Contract No. ECCS-1665172), in part by the U.S. Air Force Research Laboratory, in part by Space Vehicles Directorate (Contract No. FA9453-11-C-0253), in part by the Ohio Federal Research Network (Center for Materials and Manufacturing), in part by the Office of Naval Research (Contract No. N00014-17-1-2223), in part by the Swiss National Science Foundation, in part by Nano-Tera.ch, and in part by the Swiss Federal Office of Energy, under Grant SI/501072-01.
JournalIEEE Journal of Photovoltaics