CuS/WS₂ and CuS/MoS₂ heterostructures for high performance counter electrodes in dye-sensitized solar cells
- Authors
- Hussain, Sajjad; Patil, Supriya A.; Memon, Anam Ali; Vikraman, Dhanasekaran; Naqvi, Bilal Abbas; Jeong, Sung Hoon; Kim, Hyun-Seok; Kim, Hak-Sung; Jung, Jongwan
- Issue Date
- Sep-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- TMD; Heterostructure; Sputtering; CEs; DSSC
- Citation
- SOLAR ENERGY, v.171, pp.122 - 129
- Indexed
- SCIE
SCOPUS
- Journal Title
- SOLAR ENERGY
- Volume
- 171
- Start Page
- 122
- End Page
- 129
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16111
- DOI
- 10.1016/j.solener.2018.05.074
- ISSN
- 0038-092X
- Abstract
- In this work, we demonstrated CuS/WS₂ and CuS/MoS₂ heterostructures via a sputtering-CVD process for dye sensitized solar cells (DSSCs) as a counter electrode (CE) to replace the currently preferred expensive platinum (Pt). The cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel curve studies revealed that the unique CuS/WS₂ and CuS/MoS₂ heterostructures were beneficial in achieving high electrocatalytic activity, low charge-transfer resistance at the CE/electrolyte interface, and fast reaction kinetics for the reduction of triiodide to iodide at the CE. The constructed DSSCs using these CuS/WS₂ and CuS/MoS₂ CEs exhibited high-power conversion efficiencies (PCEs) of 8.21% and 7.12%, respectively, which are comparable to conventional Pt CE (8.74%) and pristine WS₂, MoS₂, and CuS CEs (6.0%, 6.3% and 6.4%). This novel sulfur based heterostructure opens up opportunities for a variety of optoelectronic and photoelectrochemical applications.
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