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

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

© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 31(2019), 17 vom: 01. Apr., Seite e1805580
1. Verfasser: Kim, Younghoon (VerfasserIn)
Weitere Verfasser: Che, Fanglin, Jo, Jea Woong, Choi, Jongmin, García de Arquer, F Pelayo, Voznyy, Oleksandr, Sun, Bin, Kim, Junghwan, Choi, Min-Jae, Quintero-Bermudez, Rafael, Fan, Fengjia, Tan, Chih Shan, Bladt, Eva, Walters, Grant, Proppe, Andrew H, Zou, Chengqin, Yuan, Haifeng, Bals, Sara, Hofkens, Johan, Roeffaers, Maarten B J, Hoogland, Sjoerd, Sargent, Edward H
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article colloidal quantum dots facet-specific passivation infrared solar cells narrow bandgap sodium acetate
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245 1 2 |a A Facet-Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics 
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520 |a 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 
650 4 |a Journal Article 
650 4 |a colloidal quantum dots 
650 4 |a facet-specific passivation 
650 4 |a infrared solar cells 
650 4 |a narrow bandgap 
650 4 |a sodium acetate 
700 1 |a Che, Fanglin  |e verfasserin  |4 aut 
700 1 |a Jo, Jea Woong  |e verfasserin  |4 aut 
700 1 |a Choi, Jongmin  |e verfasserin  |4 aut 
700 1 |a García de Arquer, F Pelayo  |e verfasserin  |4 aut 
700 1 |a Voznyy, Oleksandr  |e verfasserin  |4 aut 
700 1 |a Sun, Bin  |e verfasserin  |4 aut 
700 1 |a Kim, Junghwan  |e verfasserin  |4 aut 
700 1 |a Choi, Min-Jae  |e verfasserin  |4 aut 
700 1 |a Quintero-Bermudez, Rafael  |e verfasserin  |4 aut 
700 1 |a Fan, Fengjia  |e verfasserin  |4 aut 
700 1 |a Tan, Chih Shan  |e verfasserin  |4 aut 
700 1 |a Bladt, Eva  |e verfasserin  |4 aut 
700 1 |a Walters, Grant  |e verfasserin  |4 aut 
700 1 |a Proppe, Andrew H  |e verfasserin  |4 aut 
700 1 |a Zou, Chengqin  |e verfasserin  |4 aut 
700 1 |a Yuan, Haifeng  |e verfasserin  |4 aut 
700 1 |a Bals, Sara  |e verfasserin  |4 aut 
700 1 |a Hofkens, Johan  |e verfasserin  |4 aut 
700 1 |a Roeffaers, Maarten B J  |e verfasserin  |4 aut 
700 1 |a Hoogland, Sjoerd  |e verfasserin  |4 aut 
700 1 |a Sargent, Edward H  |e verfasserin  |4 aut 
773 0 8 |i Enthalten in  |t Advanced materials (Deerfield Beach, Fla.)  |d 1998  |g 31(2019), 17 vom: 01. Apr., Seite e1805580  |w (DE-627)NLM098206397  |x 1521-4095  |7 nnns 
773 1 8 |g volume:31  |g year:2019  |g number:17  |g day:01  |g month:04  |g pages:e1805580 
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