High Performance of 3D Symmetric Flowerlike Sb₂S₃ Nanostructures in Dye‐Sensitized Solar Cells

Abstract

Antimony sulfide (Sb S ) 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 S 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 S samples have better electrocatalytic activity and charge-transfer ability than that of Pt, and thus, can be regarded as good substitutes for precious metals.

Kinetic and thermodynamic study in piezo degradation of methylene blue by SbSI/Sb2S3 nanocomposites stimulated by zirconium oxide balls

“…The XRD and EDS of prepared samples were presented in Figure S1 and Figures S2 – S7 . XRD pattern of samples S 1 –S 6 in Figure S1 showed that S 3 had an amorphous structure, while other samples crystallized as orthorhombic SbSI and orthorhombic Sb 2 S 3 closely matched well with the previous reports on the XRD pattern of SbSI nanostructures 39 – 42 . EDS results for the qualitative analysis of SbSI/Sb 2 S 3 nanocomposites were presented in Figures S2 – S7 and approved the presence of elements S, Sb, and I in prepared samples which could be assigned SbSI/Sb 2 S 3 nanocomposites.…”

“…Based on the results, degradation efficiency was decreased by more than 30% by increasing the temperature of shaking from 20 to 70 °C. This happens because we were close to the curie temperature by increasing the temperature and the catalyst will show a more symmetric structure 41 , 42 .…”

Novel 2D-AuSe nanostructures as effective platinum replacement counter electrodes in dye-sensitized solar cells

“…The two pairs of redox peaks on the CV curves have similar shapes as the Pt CE suggesting that the AuSe CEs have similar catalytic activity during the redox process. 17,25 The negative (left side) and positive (right side) are represented by eqn (1) and (2), respectively. 26,27 I 3 − + 2e − ↔ 3I − 3I 2 + 2e − ↔ 3I 3 − …”

“…14,15 Variations such as different carbonaceous materials, carbon-metal composites, polymers and inorganic materials such as metal chalcogenides and metal oxides have been explored as replacement CEs for platinum. 1,8,[16][17][18] In addition to the properties listed above, a high surface area is an added advantage for a counter electrode as it allows for faster catalytic redox activity. Transition metal chalcogenides with a two-dimensional layered structure have this feature and have therefore drawn much attention as potential alternative CEs in DSSCs.…”