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Tuning the composition of heavy metal-free quaternary quantum dots for improved photoelectrochemical performance
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; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, 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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2021 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, E-ISSN 2050-7496, Vol. 9, no 9, p. 5825-5832Article in journal (Refereed) Published
Abstract [en]

Colloidal quantum dots (QDs) are promising building blocks towards the development of cost-effective and high-efficiency photoelectrochemical (PEC) cells. Unfortunately, the frequent use of QDs possessing heavy metals (e.g. Cd and Pb) in state-of-the-art QD-based PEC technologies is a major obstacle regarding their future commercial perspective. In this work, we synthesized heavy metal-free quaternary CuZnInS3 (CZIS) with variable Cu : Zn ratios and fabricated corresponding QDs-PEC devices via a facile chemical bath deposition (CBD) technique. It is revealed that the tuned CZIS (1Zn) QDs (i.e. Cu : Zn ratio of 1 : 1) can result in optimized optical properties including enhanced quantum yield, suppressed nonradiative recombination and extended excitonic lifetime. Accordingly, as-fabricated CZIS (1Zn) QD-based photoanodes demonstrated increased charge transfer rate and decreased electron transport resistance for improved PEC performance. The results indicate that tuning the composition of heavy metal-free multinary QDs is one of the promising pathways to achieve eco-friendly and high-performance PEC systems for solar hydrogen production.

Place, publisher, year, edition, pages
Royal Society of Chemistry, 2021. Vol. 9, no 9, p. 5825-5832
National Category
Other Physics Topics
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-83511DOI: 10.1039/D0TA11481BISI: 000627067700041Scopus ID: 2-s2.0-85102255120OAI: oai:DiVA.org:ltu-83511DiVA, id: diva2:1542570
Funder
The Kempe FoundationsKnut and Alice Wallenberg Foundation
Note

Validerad;2021;Nivå 2;2021-04-08 (alebob);

Finansiär: National Key Research and Development Program of China (2019YFE0121600); Sichuan Science and Technology Program (2021YFH0054); National Key Research and Development Program of China (2019YFB2203400); “111 Project” (B20030); UESTC Shared Research Facilities of Electromagnetic Wave and Matter Interaction (Y0301901290100201); HICOE (Phase II) fund (AKU254); UKM Human Capital Fund (MI-2019-005)

Available from: 2021-04-08 Created: 2021-04-08 Last updated: 2023-10-28Bibliographically approved

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Vomiero, Alberto

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