Journal
SCIENCE
Volume 356, Issue 6334, Pages 167-171Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aam6620
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Funding
- Global Frontier RAMP
- D Program for Multiscale Energy System through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2011-0031565, NRF-2016M3A6A7945503]
- Climate Change Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [NRF-2015M1A2A2056542]
- Wearable Platform Materials Technology Center (WMC) through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, and Future Planning [2016R1A5A1009926]
- KIST-UNIST [1.160097.01/2.160482.01]
- Ministry of Science & ICT (MSIT), Republic of Korea [2017미래선도형] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016R1A5A1009926, 2015M1A2A2056542, 2011-0031565, 2016M3A6A7945503] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Perovskite solar cells (PSCs) exceeding a power conversion efficiency (PCE) of 20% have mainly been demonstrated by using mesoporous titanium dioxide (mp-TiO2) as an electron-transporting layer. However, TiO2 can reduce the stability of PSCs under illumination (including ultraviolet light). Lanthanum (La)-doped BaSnO3 (LBSO) perovskite would be an ideal replacement given its electron mobility and electronic structure, but LBSO cannot be synthesized as well-dispersible fine particles or crystallized below 500 degrees C. We report a superoxide colloidal solution route for preparing a LBSO electrode under very mild conditions (below 300 degrees C). The PSCs fabricated with LBSO and methylammonium lead iodide (MAPbI(3)) show a steady-state power conversion efficiency of 21.2%, versus 19.7% for a mp-TiO2 device. The LBSO-based PSCs could retain 93% of their initial performance after 1000 hours of full-Sun illumination.
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