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CuS/WS2 and CuS/MoS2 heterostructures for high performance counter electrodes in dye-sensitized solar cells

Title
CuS/WS2 and CuS/MoS2 heterostructures for high performance counter electrodes in dye-sensitized solar cells
Author
정성훈
Keywords
TMD; Heterostructure; Sputtering; CEs; DSSC
Issue Date
2018-09
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Citation
SOLAR ENERGY, v. 171, page. 122-129
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.
URI
https://www.sciencedirect.com/science/article/pii/S0038092X18305073?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/120079
ISSN
0038-092X
DOI
10.1016/j.solener.2018.05.074
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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