Design of WSe2/MoS2 Heterostructures as the Counter Electrode to Replace Pt for Dye-Sensitized Solar Cell
- Authors
- Vikraman, Dhanasekaran; Arbab, Alvira Ayoub; Hussain, Sajjad; Shrestha, Nabeen K.; Jeong, Sung Hoon; Jung, Jongwan; Patil, Supriya A.; Kim, Hyun-Seok
- Issue Date
- Aug-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- Heterostructures; WSe2/MoS2; Surface; Solar cells; DSSCs
- Citation
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING, v.7, no.15, pp.13195 - 13205
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS SUSTAINABLE CHEMISTRY & ENGINEERING
- Volume
- 7
- Number
- 15
- Start Page
- 13195
- End Page
- 13205
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/2880
- DOI
- 10.1021/acssuschemeng.9b02430
- ISSN
- 2168-0485
- Abstract
- This work reports fabrication of van der Waals interacted WSe2/MoS2 heterostructures on fluorine-doped tin oxide substrates by physicochemical routes. Structural confirmations were performed with Raman scattering and X-ray diffraction, and interfacial structure was investigated using X-ray photoelectron spectroscopy depth profiles. The fabricated WSe2/MoS2 heterostructures were successfully employed as counter electrodes for a dye-sensitized solar cell (DSSC), for the first time. The fabricated WSe2/MoS2 heterostructure counter electrode using assembled DSSC achieved 8.44% maximum power conversion efficiency, comparable to conventional high cost Pt (8.73%). Electrochemical voltammetry, impedance, and Tafel results confirmed the benefits of heterostructure formation to generate interfacial conduction and active facet sharing, thereby improving triiodide reduction catalytic activity. These outcomes open a pathway to fabricate heterostructures as DSSC counter electrodes with effective performance.
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