Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 14, Pages 5237-5240Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja501218u
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Funding
- Flexible Electronics Theme of the Future Manufacturing Flagship as part of an Office of the Chief Executive Postdoctoral Fellowship
- Australian Research Council [DP110105341]
- DECRA
- Australian Renewable Energy Agency through the Australian Centre for Advanced Photovoltaics
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A facile ligand exchange method for dispersing Cu2ZnSnS4 (CZTS) nanocrystals (NCs) in environmentally benign polar solvents, such as ethanol or n-propanol, at high concentrations (up to 200 mg/mL) is demonstrated. This approach has been applied to CZTS nanocrystals synthesized via scalable, noninjection methods to formulate colloidally stable inks that are suitable for the solution processing of solar cell devices. Unlike other inks currently used to fabricate NC solar cells, the CZTS nanocrystal ink developed here circumvents the need for hydrazine, pyridine, or thiol coordinating solvents. By combining our polar CZTS inks with optimized selenization procedures, substrate CZTSSe solar cells have been successfully fabricated with device efficiencies of 7.7%.
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