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Environmentally friendly Mn-alloyed core/shell quantum dots for high-efficiency photoelectrochemical cells
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, P. R. China.
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2020 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, E-ISSN 2050-7496, Vol. 8, no 21, p. 10736-10741Article in journal (Refereed) Published
Abstract [en]

Colloidal quantum dot (QD)-based photoelectrochemical (PEC) cells are cost-effective devices showing remarkable solar-to-fuel conversion efficiency. However, the extensive use of highly toxic elements (e.g. Pb and Cd) in QDs' synthesis and device fabrication is still a major challenge towards their practical development. Herein, we fabricate a solar-driven PEC cell based on environmentally friendly Mn-alloyed CuInS2 (MnCIS)/ZnS core/shell QDs, showing more favorable band alignment, efficient charge transfer, reduced charge recombination and lower charge transfer resistance with respect to the control device fabricated using unalloyed CuInS2 (CIS)/ZnS core/shell QDs. An unprecedented photocurrent density of ∼5.7 mA cm−2 with excellent stability was obtained for the as-fabricated MnCIS/ZnS core/shell QD-based PEC device when operated under standard one sun irradiation (AM 1.5G, 100 mW cm−2). These results indicate that the transition metal-alloyed environmentally friendly core/shell QDs are promising for next-generation solar technologies.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2020. Vol. 8, no 21, p. 10736-10741
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Experimental Physics
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URN: urn:nbn:se:ltu:diva-79694DOI: 10.1039/D0TA00953AISI: 000538143000044Scopus ID: 2-s2.0-85085958865OAI: oai:DiVA.org:ltu-79694DiVA, id: diva2:1442373
Note

Validerad;2020;Nivå 2;2020-06-22 (alebob)

Available from: 2020-06-17 Created: 2020-06-17 Last updated: 2020-06-22Bibliographically approved

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Vomiero, Alberto

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