Efficient charge separation and transport in a tandem solar cell with photoconducting Se sub-microtubes and AgBiS2 quantum dots

Kolay, A. and Flint, H. and Deepa, Melepurath and et al, . (2022) Efficient charge separation and transport in a tandem solar cell with photoconducting Se sub-microtubes and AgBiS2 quantum dots. Chemical Engineering Journal, 437. pp. 1-13. ISSN 1385-8947

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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. © 2022 Elsevier B.V.

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IITH Creators:
IITH CreatorsORCiD
Deepa, Melepurathhttps://orcid.org/0000-0001-7070-5100
Item Type: Article
Additional Information: Author A.K. is thankful to University Grants Commission (UGC) of India for the grant of senior research fellowship. EAG and HF thank ERC 715354 p-TYPE and the EPSRC for funding via the North East Centre for Energy Materials EP/R021503/1 and EPSRC Global Challenges Research Fund, Partnering for GCRF, GCRF_IS_2017
Uncontrolled Keywords: Efficiency, Photocathode, Quantum dot solar cell, Selenium, Silver bismuth sulfide, Tandem
Subjects: Chemistry
Divisions: Department of Chemistry
Depositing User: . LibTrainee 2021
Date Deposited: 25 Jun 2022 06:16
Last Modified: 27 Jun 2022 04:19
URI: http://raiith.iith.ac.in/id/eprint/9392
Publisher URL: https://doi.org/10.1016/j.cej.2022.135223
OA policy: https://v2.sherpa.ac.uk/id/publication/16515
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