Journal
ACS ENERGY LETTERS
Volume 3, Issue 11, Pages 2669-2670Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b01704
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Funding
- National Science Foundation [OIA-1538893]
- Office of Naval Research [N00014-17-1-2232]
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Photoluminescence Photoluminescence microscopy reveals subgrain special boundaries in FAPbI(3) perosvkite thin films that restrict carrier diffusion and serve as nonradiative recombination sites. These subgrain boundaries, which cannot be observed by conventional AFM or SEM measurements of grain-boundary grooves, may explain why the performance of perovskite solar cells has not scaled with apparent grain size.
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