Advanced Materials, volume 31, issue 17, pages 1805580

A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics

Younghoon Kim 1
Fanglin Che 1
Jea Woong Jo 1
Taiho Park 1
F. Pelayo García de Arquer 1
Bin Sun 1
Jung Hwan Kim 1
Min-Jae Choi 1
Fengjia Fan 1
Chih Shan Tan 1
Eva Bladt 2
Grant C. Walters 1
Andrew H. Proppe 1
Chengqin Zou 1
Haifeng Yuan 1, 3
Sara Bals 2
J. Hofkens 3
Publication typeJournal Article
Publication date2019-03-12
Quartile SCImago
Q1
Quartile WOS
Q1
Impact factor29.4
ISSN09359648, 15214095
General Materials Science
Mechanical Engineering
Mechanics of Materials
Abstract
Colloidal nanocrystals combine size- and facet-dependent properties with solution processing. They offer thus a compelling suite of materials for technological applications. Their size- and facet-tunable features are studied in synthesis; however, to exploit their features in optoelectronic devices, it will be essential to translate control over size and facets from the colloid all the way to the film. Larger-diameter colloidal quantum dots (CQDs) offer the attractive possibility of harvesting infrared (IR) solar energy beyond absorption of silicon photovoltaics. These CQDs exhibit facets (nonpolar (100)) undisplayed in small-diameter CQDs; and the materials chemistry of smaller nanocrystals fails consequently to translate to materials for the short-wavelength IR regime. A new colloidal management strategy targeting the passivation of both (100) and (111) facets is demonstrated using distinct choices of cations and anions. The approach leads to narrow-bandgap CQDs with impressive colloidal stability and photoluminescence quantum yield. Photophysical studies confirm a reduction both in Stokes shift (≈47 meV) and Urbach tail (≈29 meV). This approach provides a ≈50% increase in the power conversion efficiency of IR photovoltaics compared to controls, and a ≈70% external quantum efficiency at their excitonic peak.

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GOST Copy
Kim Y. et al. A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics // Advanced Materials. 2019. Vol. 31. No. 17. p. 1805580.
GOST all authors (up to 50) Copy
Kim Y., Che F., Jo J. W., Park T., Pelayo García de Arquer F., Voznyy O., Sun B., Kim J. H., Choi M., Quintero-Torres R., Fan F., Tan C. S., Bladt E., Walters G. C., Proppe A. H., Zou C., Yuan H., Bals S., Hofkens J., Roeffaers M., Hoogland S., Sargent E. H. A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics // Advanced Materials. 2019. Vol. 31. No. 17. p. 1805580.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1002/adma.201805580
UR - https://doi.org/10.1002/adma.201805580
TI - A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics
T2 - Advanced Materials
AU - Che, Fanglin
AU - Bladt, Eva
AU - Sargent, Edward H.
AU - Kim, Younghoon
AU - Jo, Jea Woong
AU - Park, Taiho
AU - Pelayo García de Arquer, F.
AU - Voznyy, Oleksandr
AU - Sun, Bin
AU - Kim, Jung Hwan
AU - Choi, Min-Jae
AU - Quintero-Torres, Rafael
AU - Fan, Fengjia
AU - Tan, Chih Shan
AU - Walters, Grant C.
AU - Proppe, Andrew H.
AU - Zou, Chengqin
AU - Yuan, Haifeng
AU - Bals, Sara
AU - Hofkens, J.
AU - Roeffaers, Maarten
AU - Hoogland, Sjoerd
PY - 2019
DA - 2019/03/12 00:00:00
PB - Wiley
SP - 1805580
IS - 17
VL - 31
SN - 0935-9648
SN - 1521-4095
ER -
BibTex |
Cite this
BibTex Copy
@article{2019_Kim,
author = {Fanglin Che and Eva Bladt and Edward H. Sargent and Younghoon Kim and Jea Woong Jo and Taiho Park and F. Pelayo García de Arquer and Oleksandr Voznyy and Bin Sun and Jung Hwan Kim and Min-Jae Choi and Rafael Quintero-Torres and Fengjia Fan and Chih Shan Tan and Grant C. Walters and Andrew H. Proppe and Chengqin Zou and Haifeng Yuan and Sara Bals and J. Hofkens and Maarten Roeffaers and Sjoerd Hoogland},
title = {A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics},
journal = {Advanced Materials},
year = {2019},
volume = {31},
publisher = {Wiley},
month = {mar},
url = {https://doi.org/10.1002/adma.201805580},
number = {17},
pages = {1805580},
doi = {10.1002/adma.201805580}
}
MLA
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MLA Copy
Kim, Younghoon, et al. “A Facet‐Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics.” Advanced Materials, vol. 31, no. 17, Mar. 2019, p. 1805580. https://doi.org/10.1002/adma.201805580.
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