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Lookup NU author(s): Dr Heather Flint, Professor Elizabeth GibsonORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
© 2022 Elsevier B.V. This article describes a tandem photoelectrochemical cell that captures and converts visible to near infrared light to deliver a power conversion efficiency of ∼ 7%. In this tandem device the photocathode was prepared from p-type nickel oxide sensitized with silver bismuth sulfide (AgBiS2) quantum dots and was paired with a photoanode based on cadmium sulfide-sensitized titania. Trigonal-selenium sub-microtubes (t-Se s-μT) were anchored to the photoanode and served two roles: (1) enhancement of the conductivity under illumination (with holes as majority carriers); (2) co-sensitization provided more electron-hole pairs that increased the device performance by 1.5-fold. The separate p-type (AgBiS2/NiO−Ni) and n-type (TiO2/CdS/Se−Ni) solar cells were characterized as well as the (p/n) tandem cell architecture with a quasi-solid polysulfide/silica gel electrolyte under 1 sun illumination (AM 1.5G). The results provide scientific insights into the proposed charge flow mechanism via favourable energy level alignment in this unique device.
Author(s): Kolay A, Flint H, Gibson EA, Deepa M
Publication type: Article
Publication status: Published
Journal: Chemical Engineering Journal
Year: 2022
Volume: 437
Issue: 1
Print publication date: 01/06/2022
Online publication date: 12/02/2022
Acceptance date: 09/02/2022
Date deposited: 08/04/2022
ISSN (print): 1385-8947
ISSN (electronic): 1873-3212
Publisher: Elsevier B.V.
URL: https://doi.org/10.1016/j.cej.2022.135223
DOI: 10.1016/j.cej.2022.135223
ePrints DOI: 10.57711/ga2j-y631
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