Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 48, Pages 20966-20972Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp54623c
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Funding
- Argonne-Northwestern Solar Energy Research (ANSER) Center, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0001059]
- Institute for Sustainability and Energy at Northwestern (ISEN)
- NSF-NSEC, NSF-MRSEC
- Direct For Mathematical & Physical Scien [1121262] Funding Source: National Science Foundation
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Organic photovoltaics have the potential to serve as lightweight, low-cost, mechanically flexible solar cells. However, losses in efficiency as laboratory cells are scaled up to the module level have to date impeded large scale deployment. Here, we report that a 3-aminopropyltriethoxysilane (APTES) cathode interfacial treatment significantly enhances performance reproducibility in inverted high-efficiency PTB7:PC71BM organic photovoltaic cells, as demonstrated by the fabrication of 100 APTES-treated devices versus 100 untreated controls. The APTES-treated devices achieve a power conversion efficiency of 8.08 +/- 0.12% with histogram skewness of -0.291, whereas the untreated controls achieve 7.80 +/- 0.26% with histogram skewness of -1.86. By substantially suppressing the interfacial origins of underperforming cells, the APTES treatment offers a pathway for fabricating large-area modules with high spatial performance uniformity.
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