Ligand-bridged charge extraction and enhanced quantum efficiency enable efficient n-i-p perovskite/silicon tandem solar cells
Harrison, George T.
de Bastiani, Michele
Rehman, Atteq Ur
Subbiah, Anand Selvin
Isikgor, Furkan Halis
Van Kerschaver, Emmanuel
Sargent, Edward H.
De Wolf, Stefaan
KAUST DepartmentKAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/670497
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AbstractTranslating the high power conversion efficiencies of single-junction perovskite solar cells in their classic, non-inverted (n–i–p) architecture to efficient monolithic n–i–p perovskite/silicon tandem solar cells with high current densities has been a persistent challenge due to the lack of low-temperature processable, chemically-insoluble contact materials with appropriate polarity and sufficient optical transparency. To address this, we developed sputtered amorphous niobium oxide (a-NbOx) with ligand-bridged C60 as an efficient electron-selective contact, deposited on the textured-silicon bottom cell. For the sunward, hole-selective contact we implemented a stack of molecularly doped broadband transparent evaporated 2,2′,7,7′-tetra(N,N-di-p-tolyl)amino-9,9-spirobifluorene (spiro-TTB) and atomic layer deposited vanadium oxide, which further enhances the device quantum efficiency. Combining these contact materials with two-dimensional perovskite passivation on the micrometer-thick solution-processed perovskite top cell yields 27% efficient monolithic n–i–p perovskite/silicon tandem solar cells, which represents one of the highest power conversion efficiencies reported on pyramidal textured crystalline silicon bottom cells, and the highest with this polarity.
CitationAydin, E., Liu, J., Ugur, E., Azmi, R., Harrison, G. T., Hou, Y., … De Wolf, S. (2021). Ligand-bridged charge extraction and enhanced quantum efficiency enable efficient n–i–p perovskite/silicon tandem solar cells. Energy & Environmental Science. doi:10.1039/d1ee01206a
SponsorsThe authors would like to thanks to Nini Wei for the TEM images; funding: the research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST) under award no. OSR-CARF/CCF-3079 and award no. IED OSR-2019-4208.
PublisherRoyal Society of Chemistry (RSC)
JournalENERGY & ENVIRONMENTAL SCIENCE
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