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Sulfur-doped reduced graphene oxide/MoS2 composite with exposed active sites as efficient Pt-free counter electrode for dye-sensitized solar cell.
- Source :
-
Applied Surface Science . Sep2018, Vol. 452, p232-238. 7p. - Publication Year :
- 2018
-
Abstract
- Low-cost catalysts possessing merits of high conductivity and plenty of active sites are highly desirable for the developing of Pt-free counter electrode (CE) in dye-sensitized solar cells (DSCs). In this study, porous sulfur-doped reduced graphene oxide/MoS 2 (S-rGO/MoS 2 ) composites were successfully synthesized via a simple one-step annealing strategy employing CS 2 as sulfur source. Electrochemical measurements revealed that the as-prepared composite presented a superior catalytic activity on the triiodide reduction process, comparable with Pt electrode. Under optimized conditions, a power conversion efficiency of 6.96% was achieved for the N719-sensitized solar cell with a S-rGO/MoS 2 CE, which is very close to that for the device containing a thermally deposited Pt CE (7.35%). The outstanding electro-catalytic activity of composite was attributed to the exposed numerous edges providing much more active sites, and good conductivity resulting from two-dimensional conductive networks of both S-rGO and MoS 2 . This work demonstrated S-rGO/MoS 2 composite as a promising alternative for noble metal Pt in triiodide reduction process and a simple approach of employing two-dimensional nanomaterials as multifunctional materials in photovoltaic for mass application. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SULFUR
*GRAPHENE oxide
*MOLYBDENUM disulfide
*DYE-sensitized solar cells
*PLATINUM
Subjects
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 452
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 129789981
- Full Text :
- https://doi.org/10.1016/j.apsusc.2018.04.276