Hyperbranched TiO2-CdS nano-heterostructures for highly efficient photoelectrochemical photoanodes.
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Authors
Mezzetti, Alessandro
Balandeh, Mehrdad
Luo, Jingshan
Bellani, Sebastiano
Tacca, Alessandra
Cheng, Chuanwei
Meda, Laura
Fan, Hongjin
Di Fonzo, Fabio
Publication Date
2018-08-17Journal Title
Nanotechnology
ISSN
0957-4484
Publisher
IOP Publishing
Volume
29
Issue
33
Pages
335404
Language
eng
Type
Article
Physical Medium
Print-Electronic
Metadata
Show full item recordCitation
Mezzetti, A., Balandeh, M., Luo, J., Bellani, S., Tacca, A., Divitini, G., Cheng, C., et al. (2018). Hyperbranched TiO2-CdS nano-heterostructures for highly efficient photoelectrochemical photoanodes.. Nanotechnology, 29 (33), 335404. https://doi.org/10.1088/1361-6528/aac852
Abstract
Quasi-1D-hyperbranched TiO2 nanostructures are grown via pulsed laser deposition and sensitized with thin layers of CdS to act as a highly efficient photoelectrochemical photoanode. The device properties are systematically investigated by optimizing the height of TiO2 scaffold structure and thickness of the CdS sensitizing layer, achieving photocurrent values up to 6.6 mA cm-2 and reaching saturation with applied biases as low as 0.35 VRHE. The high internal conversion efficiency of these devices is to be found in the efficient charge generation and injection of the thin CdS photoactive film and in the enhanced charge transport properties of the hyperbranched TiO2 scaffold. Hence, the proposed device represents a promising architecture for heterostructures capable of achieving high solar-to-hydrogen efficiency.
Sponsorship
European Research Council (259619)
Identifiers
External DOI: https://doi.org/10.1088/1361-6528/aac852
This record's URL: https://www.repository.cam.ac.uk/handle/1810/279538
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