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High Performance of 3D Symmetric Flowerlike Sb 2 S 3 Nanostructures in Dye‐Sensitized Solar Cells
Author(s) -
Li Xuemin,
Bai Jinwu,
Zhou Bo,
Yuan Xianfeng,
Zhang Xiao,
Liu Lu
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201802048
Subject(s) - tafel equation , materials science , auxiliary electrode , chalcogenide , dye sensitized solar cell , energy conversion efficiency , cyclic voltammetry , nanostructure , photoelectric effect , mesoporous material , optoelectronics , nanoflower , nanotechnology , electrochemistry , hydrothermal circulation , copper sulfide , electrode , chemical engineering , chemistry , copper , biochemistry , engineering , electrolyte , catalysis , metallurgy
Antimony sulfide (Sb 2 S 3 ) is an important chalcogenide belonging to Group V–VI that is suitable for application as a photoelectric material in the fields of photocatalysis, photoconductive detectors, ion conductor materials, and solar energy conversion materials. Herein, a facile, one‐step hydrothermal method is used to synthesize a 3D, symmetric, flowerlike Sb 2 S 3 nanostructure. The structure was composed of numerous nanoneedles, which provided a large void fraction and specific surface area. Characteristic mesoporous structures of the samples contribute to excellent performance. If they were used as counter electrode materials in dye‐sensitized solar cells, the photoelectric conversion efficiency was as high as 7.12 %, whereas the photoelectric conversion efficiency of platinum was only 6.46 %. Furthermore, according to the results of cyclic voltammetry, electrochemical impedance spectra, and Tafel polarization testing, the obtained Sb 2 S 3 samples have better electrocatalytic activity and charge‐transfer ability than that of Pt, and thus, can be regarded as good substitutes for precious metals.