22.8%-Efficient single-crystal mixed-cation inverted perovskite solar cells with a near-optimal bandgap
AuthorsAlsalloum, Abdullah Yousef
Almasabi, Khulud M.
Stranks, Samuel D.
Mohammed, Omar F.
KAUST DepartmentChemical Science Program
Functional Nanomaterials Lab (FuNL)
KAUST Catalysis Center (KCC)
KAUST Solar Center (KSC)
Material Science and Engineering
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
Embargo End Date2022-05-06
Permanent link to this recordhttp://hdl.handle.net/10754/669111
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AbstractExpanding the near-infrared (NIR) response of perovskite materials to approach the ideal bandgap range (1.1-1.4 eV) for single-junction solar cells is an attractive step to unleash the full potential of perovskite solar cells (PSCs). However, polycrystalline formamidinium lead triiodide (FAPbI3)-based absorbers, used in record-efficiency PSCs, currently offer the smallest bandgap that can be achieved for lead-halide perovskite thin films (>100 meV larger than the optimal bandgap). Here, we uncover that utilizing a mixed-cation single-crystal absorber layer (FA0.6MA0.4PbI3) is capable of redshifting the external quantum efficiency (EQE) band edge past that of FAPbI3 polycrystalline solar cells by about 50 meV-only 60 meV larger than that of the top-performing photovoltaic material, GaAs-leading to EQE-verified short-circuit current densities exceeding 26 mA cm-2 without sacrificing the open-circuit voltage (VOC), and therefore, yielding power conversion efficiencies of up to 22.8%. These figures of merit not only set a new record for SC-PSCs and are among the highest reported for inverted-structured-PSCs, but also offer an avenue for lead halide PSCs to advance their performance toward their theoretical Shockley-Queisser Limit potential. This journal is
CitationAlsalloum, A. Y., Turedi, B., Almasabi, K., Zheng, X., Naphade, R., Stranks, S. D., … Bakr, O. M. (2021). 22.8%-Efficient single-crystal mixed-cation inverted perovskite solar cells with a near-optimal bandgap. Energy & Environmental Science, 14(4), 2263–2268. doi:10.1039/d0ee03839c
SponsorsWe acknowledge the use of KAUST Core Lab and KAUST Solar Center facilities. S.D.S acknowledges the Royal Society and Tata Group (UF150033).
PublisherRoyal Society of Chemistry (RSC)
JournalEnergy & Environmental Science
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