Two-dimensional perovskite templates for durable, efficient formamidinium perovskite solar cells
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- Rice University, Houston, TX (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- University of California, San Diego, La Jolla, CA (United States)
- University of Lille (France)
- Northwestern University, Evanston, IL (United States)
- Purdue University, West Lafayette, IN (United States)
- Université Rennes (France)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- University of Washington, Seattle, WA (United States)
- Université Rennes (France)
We present a design strategy for fabricating ultrastable phase-pure films of formamidinium lead iodide (FAPbI3) by lattice templating using specific two-dimensional (2D) perovskites with FA as the cage cation. When a pure FAPbI3 precursor solution is brought in contact with the 2D perovskite, the black phase forms preferentially at 100°C, much lower than the standard FAPbI3 annealing temperature of 150°C. X-ray diffraction and optical spectroscopy suggest that the resulting FAPbI3 film compresses slightly to acquire the (011) interplanar distances of the 2D perovskite seed. The 2D-templated bulk FAPbI3 films exhibited an efficiency of 24.1% in a p-i-n architecture with 0.5–square centimeter active area and an exceptional durability, retaining 97% of their initial efficiency after 1000 hours under 85°C and maximum power point tracking.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357; SC0012704
- OSTI ID:
- 2376158
- Alternate ID(s):
- OSTI ID: 2403448
- Report Number(s):
- BNL--225821-2024-JAAM; ark:/13030/qt05d359b4
- Journal Information:
- Science, Journal Name: Science Journal Issue: 6701 Vol. 384; ISSN 0036-8075
- Publisher:
- AAASCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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