Facet-dependent NiS2 polyhedrons on counter electrodes for dye-sensitized solar cells

被引:86
作者
Zheng, Jinlong [1 ]
Zhou, Wei [1 ]
Ma, Yiran [1 ]
Cao, Wei [1 ]
Wang, Chengbo [1 ]
Guo, Lin [1 ]
机构
[1] Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
IN-SITU SYNTHESIS; LOW-COST; HIGH-EFFICIENCY; GRAPHENE OXIDE; NANOPARTICLES; NANOCOMPOSITE; REDUCTION; SULFIDE; CATHODE; FILMS;
D O I
10.1039/c5cc03890a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Octahedral and cubic NiS2 nanocrystals enclosed by {111} and {100} planes were separately used as counter electrodes (CEs) incorporated into Pt-free dye-sensitized solar cells (DSSCs). The DSSC assembled by NiS2 octahedrons exhibited a conversion efficiency of 5.98%, better than that by NiS2 cubes (5.43%). DFT calculations indicate that the better catalytic effect could be ascribed to higher surface energy, more active sites, and more suitable adsorption energy of {111} planes compared with the {100} planes.
引用
收藏
页码:12863 / 12866
页数:4
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