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- Title
FeS2/FeCoS2 nanoparticles/reduced graphene oxide interfacial composite structure as highly reactive counter electrodes in dye-sensitized solar cells.
- Authors
Gao, Yuan; Liao, Wei; Wang, Wen; Zuo, Xueqin; Yang, Qun; Tang, Huaibao; Jin, Shaowei; Li, Guang
- Abstract
In this article, the nanoparticles of CoFe2O4 and FeS2/FeCoS2 have been generated by direct oxidation and sulfurization of Fe–Co precursor and used as counter electrode (CE) material for dye-sensitized solar cells (DSSCs). Compared with CoFe2O4, FeS2/FeCoS2 nanoparticles have superior electrical conductivity and catalytic activity. Furthermore, the introduction of reduced graphene oxide (RGO) improved the performance of FeS2/FeCoS2. By attaching FeS2/FeCoS2 nanoparticles to the surface of RGO, it alleviated the agglomeration of nanoparticles effectively. Meanwhile, the catalytic activity and electrical conductivity of FeS2/FeCoS2@RGO in DSSC are greatly improved. With increasing contact area, the penetration rate of the electrolyte is accelerated, which results in a faster reaction rate of tri-iodide that can be significantly accelerated. We explain the modification of FeS2/FeCoS2 nanoparticles by RGO through the morphology characterization and electrochemical performance test. The DSSCs assembled by FeS2/FeCoS2@RGO achieved a choiceness power conversion efficiency (PCE) of 7.84%, which is higher than those of CoFe2O4 nanoparticles (3.71%), FeS2/FeCoS2 nanoparticles (7.05%), and platinum (Pt) (7.54%).
- Subjects
DYE-sensitized solar cells; COMPOSITE structures; GRAPHENE oxide; PLATINUM nanoparticles; NANOPARTICLES; ELECTRIC conductivity; NICKEL sulfide
- Publication
Journal of Materials Science: Materials in Electronics, 2021, Vol 32, Issue 7, p8226
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-020-05192-8