Li, Wei, O'Dowd, Graeme, Whittles, Thomas J ORCID: 0000-0002-5154-7511, Hesp, David, Gruender, Yvonne ORCID: 0000-0002-5295-0927, Dhanak, Vinod R ORCID: 0000-0001-8053-654X and Jaeckel, Frank ORCID: 0000-0002-9486-7996
(2015)
Colloidal dual-band gap cell for photocatalytic hydrogen generation.
NANOSCALE, 7 (40).
pp. 16606-16610.
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Abstract
We report that the internal quantum efficiency for hydrogen generation in spherical, Pt-decorated CdS nanocrystals can be tuned by quantum confinement, resulting in higher efficiencies for smaller than for larger nanocrystals (17.3% for 2.8 nm and 11.4% for 4.6 nm diameter nanocrystals). We attribute this to a larger driving force for electron and hole transfer in the smaller nanocrystals. The larger internal quantum efficiency in smaller nanocrystals enables a novel colloidal dual-band gap cell utilising differently sized nanocrystals and showing larger external quantum efficiencies than cells with only one size of nanocrystals (9.4% for 2.8 nm particles only and 14.7% for 2.8 nm and 4.6 nm nanocrystals). This represents a proof-of-principle for future colloidal tandem cell.
Item Type: | Article |
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Uncontrolled Keywords: | 7 Affordable and Clean Energy |
Depositing User: | Symplectic Admin |
Date Deposited: | 04 May 2016 14:45 |
Last Modified: | 15 Mar 2024 02:23 |
DOI: | 10.1039/c5nr04950d |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3001061 |