Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 134, Issue 33, Pages 13604-13615Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja301285x
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Funding
- NSF [DMR-0847535]
- Office of Naval Research [N00014-10-1-0190]
- DOE SunShot program [DE-EE0005312]
- NSF MRSEC Program [DMR-0213745]
- Department of Energy
- MRCAT member institutions
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- U.S. Department of Energy [DE-AC02-06CH11357]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0847535] Funding Source: National Science Foundation
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Colloidal semiconductor nanocrystals (NCs) provide convenient building blocks for solution processed solar cells, light emitting devices, photocatalytic systems, etc The use of inorganic ligands for colloidal NCs dramatically improved inter-NC charge transport, enabling fast progress in NC-based devices. Typical inorganic ligands (e g, Sn2S64-, S2-) are represented by negatively charged ions that bind covalently to electrophilic metal surface sites. The binding of inorganic charged species to the NC surface provides electrostatic stabilization of NC colloids in polar solvents without introducing insulating barriers between NCs. In this work we show that cationic species needed for electrostatic balance of NC surface charges can also be employed for engineering almost every property of all-inorganic NCs and NC solids, including photoluminescence efficiency, electron mobility, doping, magnetic susceptibility, and electrocatalytic performance. We used a suite of experimental techniques to elucidate the impact of various metal ions on the characteristics of all inorganic NCs and developed strategies for engineering and optimizing NC-based materials
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