Tuning colloidal quantum dot band edge positions through solution-phase surface chemistry modification
Abstract
Band edge positions of semiconductors determine their functionality in many optoelectronic applications such as photovoltaics, photoelectrochemical cells and light emitting diodes. Here we show that band edge positions of lead sulfide (PbS) colloidal semiconductor nanocrystals, specifically quantum dots (QDs), can be tuned over 2.0 eV through surface chemistry modification. We achieved this remarkable control through the development of simple, robust and scalable solution-phase ligand exchange methods, which completely replace native ligands with functionalized cinnamate ligands, allowing for well-defined, highly tunable chemical systems. By combining experiments and ab initio simulations, we establish clear relationships between QD surface chemistry and the band edge positions of ligand/QD hybrid systems. We find that in addition to ligand dipole, inter-QD ligand shell inter-digitization contributes to the band edge shifts. We expect that our established relationships and principles can help guide future optimization of functional organic/inorganic hybrid nanostructures for diverse optoelectronic applications.
- Authors:
-
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Univ. of Colorado, Boulder, CO (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Chicago, Chicago, IL (United States)
- Univ. of Chicago, Chicago, IL (United States)
- Colorado School of Mines, Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Colorado School of Mines, Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Advanced Solar Photophysics (CASP); Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
- OSTI Identifier:
- 1357948
- Alternate Identifier(s):
- OSTI ID: 1373584
- Report Number(s):
- NREL/JA-5900-66738
Journal ID: ISSN 2041-1723
- Grant/Contract Number:
- AC36-08GO28308; AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 8; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; quantum dots; band edge positions; ligand exchange; electronic properties and materials; organic-inorganic nanostructures; chemical synthesis
Citation Formats
Kroupa, Daniel M., Vörös, Márton, Brawand, Nicholas P., McNichols, Brett W., Miller, Elisa M., Gu, Jing, Nozik, Arthur J., Sellinger, Alan, Galli, Giulia, and Beard, Matthew C. Tuning colloidal quantum dot band edge positions through solution-phase surface chemistry modification. United States: N. p., 2017.
Web. doi:10.1038/ncomms15257.
Kroupa, Daniel M., Vörös, Márton, Brawand, Nicholas P., McNichols, Brett W., Miller, Elisa M., Gu, Jing, Nozik, Arthur J., Sellinger, Alan, Galli, Giulia, & Beard, Matthew C. Tuning colloidal quantum dot band edge positions through solution-phase surface chemistry modification. United States. https://doi.org/10.1038/ncomms15257
Kroupa, Daniel M., Vörös, Márton, Brawand, Nicholas P., McNichols, Brett W., Miller, Elisa M., Gu, Jing, Nozik, Arthur J., Sellinger, Alan, Galli, Giulia, and Beard, Matthew C. Tue .
"Tuning colloidal quantum dot band edge positions through solution-phase surface chemistry modification". United States. https://doi.org/10.1038/ncomms15257. https://www.osti.gov/servlets/purl/1357948.
@article{osti_1357948,
title = {Tuning colloidal quantum dot band edge positions through solution-phase surface chemistry modification},
author = {Kroupa, Daniel M. and Vörös, Márton and Brawand, Nicholas P. and McNichols, Brett W. and Miller, Elisa M. and Gu, Jing and Nozik, Arthur J. and Sellinger, Alan and Galli, Giulia and Beard, Matthew C.},
abstractNote = {Band edge positions of semiconductors determine their functionality in many optoelectronic applications such as photovoltaics, photoelectrochemical cells and light emitting diodes. Here we show that band edge positions of lead sulfide (PbS) colloidal semiconductor nanocrystals, specifically quantum dots (QDs), can be tuned over 2.0 eV through surface chemistry modification. We achieved this remarkable control through the development of simple, robust and scalable solution-phase ligand exchange methods, which completely replace native ligands with functionalized cinnamate ligands, allowing for well-defined, highly tunable chemical systems. By combining experiments and ab initio simulations, we establish clear relationships between QD surface chemistry and the band edge positions of ligand/QD hybrid systems. We find that in addition to ligand dipole, inter-QD ligand shell inter-digitization contributes to the band edge shifts. We expect that our established relationships and principles can help guide future optimization of functional organic/inorganic hybrid nanostructures for diverse optoelectronic applications.},
doi = {10.1038/ncomms15257},
journal = {Nature Communications},
number = ,
volume = 8,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2017},
month = {Tue May 16 00:00:00 EDT 2017}
}
Web of Science
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