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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23074

Title: Perovskite-perovskite tandem photovoltaics with optimized band gaps
Authors: Eperon, Giles E.
Leijtens, Tomas
Bush, Kevin A.
Prasanna, Rohit
Green, Thomas
Wang, Jacob Tse-Wei
McMeekin, David P.
Volonakis, George
Milot, Rebecca L.
May, Richard
Palmstrom, Axel
Slotcavage, Daniel J.
Belisle, Rebecca A.
Patel, Jay B.
Parrott, Elizabeth S.
Sutton, Rebecca J.
Ma, Wen
Moghadam, Farhad
Conings, Bert
Babayigit, Aslihan
Boyen, Hans-Gerd
Bent, Stacey
Giustino, Feliciano
Herz, Laura M.
Johnston, Michael B.
McGehee, Michael D.
Snaith, Henry J.
Issue Date: 2016
Citation: SCIENCE, 354(6314), p. 861-865
Abstract: We demonstrate four-and two-terminal perovskite-perovskite tandem solar cells with ideally matched band gaps. We develop an infrared-absorbing 1.2-electron volt band-gap perovskite, FA(0.75)Cs(0.25)Sn(0.5)Pb(0.5)I(3), that can deliver 14.8% efficiency. By combining this material with a wider-band gap FA(0.83)Cs(0.17)Pb(I0.5Br0.5)(3) material, we achieve monolithic two-terminal tandem efficiencies of 17.0% with > 1.65-volt open-circuit voltage. We also make mechanically stacked four-terminal tandem cells and obtain 20.3% efficiency. Notably, we find that our infrared-absorbing perovskite cells exhibit excellent thermal and atmospheric stability, not previously achieved for Sn-based perovskites. This device architecture and materials set will enable "all-perovskite" thin-film solar cells to reach the highest efficiencies in the long term at the lowest costs.
Notes: [Eperon, Giles E.; Green, Thomas; Wang, Jacob Tse-Wei; McMeekin, David P.; Milot, Rebecca L.; Patel, Jay B.; Parrott, Elizabeth S.; Sutton, Rebecca J.; Conings, Bert; Babayigit, Aslihan; Herz, Laura M.; Johnston, Michael B.; Snaith, Henry J.] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England. [Eperon, Giles E.; May, Richard; McGehee, Michael D.] Univ Washington, Dept Chem, Seattle, WA 98195 USA. [Leijtens, Tomas; Bush, Kevin A.; Prasanna, Rohit; Slotcavage, Daniel J.; Belisle, Rebecca A.] Stanford Univ, Dept Mat Sci, Stanford, CA 94305 USA. [Volonakis, George; Giustino, Feliciano] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England. [Palmstrom, Axel; Bent, Stacey] Stanford Univ, Dept Chem Engn, Via Ortega, Stanford, CA 94305 USA. [Ma, Wen; Moghadam, Farhad] SunPreme, Palomar Ave, Sunnyvale, CA USA. [Conings, Bert; Babayigit, Aslihan; Boyen, Hans-Gerd] Hasselt Univ, Inst Mat Res, Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/23074
DOI: 10.1126/science.aaf9717
ISI #: 000388531900034
ISSN: 0036-8075
Category: A1
Type: Journal Contribution
Validation: ecoom, 2017
Appears in Collections: Research publications

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