Two-Dimensional Halide Pb-Perovskite–Double Perovskite Epitaxial Heterostructures
- Award ID(s):
- 2143568
- PAR ID:
- 10503843
- Publisher / Repository:
- American Chemical Society
- Date Published:
- Journal Name:
- Journal of the American Chemical Society
- Volume:
- 145
- Issue:
- 36
- ISSN:
- 0002-7863
- Page Range / eLocation ID:
- 19885 to 19893
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
More Like this
-
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 FAPbI3precursor solution is brought in contact with the 2D perovskite, the black phase forms preferentially at 100°C, much lower than the standard FAPbI3annealing temperature of 150°C. X-ray diffraction and optical spectroscopy suggest that the resulting FAPbI3film compresses slightly to acquire the (011) interplanar distances of the 2D perovskite seed. The 2D-templated bulk FAPbI3films 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.more » « less
An official website of the United States government

