Journal
NANO LETTERS
Volume 16, Issue 12, Pages 7786-7790Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b03989
Keywords
Hybrid perovskites; photovoltaics; stability; atomic layer deposition; inverted design
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Funding
- Argonne Northwestern Solar Energy Research Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001059]
- National Science Foundation's MRSEC program [DMR-1121262]
- Link Foundation through the Link Foundation Energy Fellowship Program
- U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
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Despite rapid advances in conversion efficiency (>22%), the environmental stability of perovskite solar cells remains a substantial barrier to commercialization. Here, we show a significant improvement in the stability of inverted perovskite solar cells against liquid water and high operating temperature (100 degrees C) by integrating an ultrathin amorphous oxide electron extraction layer via atomic layer deposition (ALD). These unencapsulated inverted devices exhibit a stable operation over at least 10 h when subjected to high thermal stress (100 degrees C) in ambient environments, as well as upon direct contact with a droplet of water without further encapsulation.
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