22.8%-Efficient single-crystal mixed-cation inverted perovskite solar cells with a near-optimal bandgap
Type
ArticleAuthors
Alsalloum, Abdullah Yousef
Turedi, Bekir

Almasabi, Khulud M.

Zheng, Xiaopeng
Naphade, Rounak

Stranks, Samuel D.

Mohammed, Omar F.

Bakr, Osman

KAUST Department
Chemical Science ProgramFunctional 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
Date
2021Embargo End Date
2022-05-06Submitted Date
2020-12-08Permanent link to this record
http://hdl.handle.net/10754/669111
Metadata
Show full item recordAbstract
Expanding 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 isCitation
Alsalloum, 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/d0ee03839cSponsors
We acknowledge the use of KAUST Core Lab and KAUST Solar Center facilities. S.D.S acknowledges the Royal Society and Tata Group (UF150033).Publisher
Royal Society of Chemistry (RSC)Journal
Energy & Environmental ScienceAdditional Links
http://xlink.rsc.org/?DOI=D0EE03839Cae974a485f413a2113503eed53cd6c53
10.1039/d0ee03839c
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