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Highly crystalline stannite-phase Cu2XSnS4 (X = Mn, Fe, Co, Ni, Zn and Cd) nanoflower counter electrodes for ZnO-based dye-sensitised solar cells.

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Title: Highly crystalline stannite-phase Cu2XSnS4 (X = Mn, Fe, Co, Ni, Zn and Cd) nanoflower counter electrodes for ZnO-based dye-sensitised solar cells.
Authors: Xie, Yahong1 xyh0707@163.com, Zhang, Chunyang1,2, Yang, Guihua1, Yang, Jianya1, Zhou, Xiaofeng1, Ma, Junbao1
Source: Journal of Alloys & Compounds. Mar2017, Vol. 696, p938-946. 9p.
Subjects: Stannite, Phase transitions, Zinc oxide, Dye-sensitized solar cells, Semiconductors
Abstract: Quaternary chalcopyrite sulfide semiconductors Cu 2 XSnS 4 (X = Mn, Fe, Co, Ni, Zn and Cd) are successfully prepared by using a solvothermal method. Crystal structure, elemental composition and morphology of the as-synthesized nanoflowers are characterised using XRD, XPS, EDS, TEM and SEM. Photovoltaic and catalytic performances based on prepared samples as counter-electrode (CE) materials in ZnO-based dye-sensitised solar cells (DSSCs) are investigated based on N719 dye and iodide/triiodide electrolyte. Notably, Cu 2 XSnS 4 (X = Mn, Fe, Co, Ni, Zn, Cd) all show excellent catalytic activity for the reduction of I 3 − to I − in the electrolyte. In addition, Cu 2 MnSnS 4 and Cu 2 NiSnS 4 are explored as CE materials for DSSCs for the first time. Cu 2 MnSnS 4 and Cu 2 NiSnS 4 exhibit power conversion efficiency values of 6.18% and 6.12%, respectively, which are comparable to the photovoltaic performance of the DSSCs using a Pt CE (6.09%). [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Quaternary chalcopyrite sulfide semiconductors Cu 2 XSnS 4 (X = Mn, Fe, Co, Ni, Zn and Cd) are successfully prepared by using a solvothermal method. Crystal structure, elemental composition and morphology of the as-synthesized nanoflowers are characterised using XRD, XPS, EDS, TEM and SEM. Photovoltaic and catalytic performances based on prepared samples as counter-electrode (CE) materials in ZnO-based dye-sensitised solar cells (DSSCs) are investigated based on N719 dye and iodide/triiodide electrolyte. Notably, Cu 2 XSnS 4 (X = Mn, Fe, Co, Ni, Zn, Cd) all show excellent catalytic activity for the reduction of I 3 − to I − in the electrolyte. In addition, Cu 2 MnSnS 4 and Cu 2 NiSnS 4 are explored as CE materials for DSSCs for the first time. Cu 2 MnSnS 4 and Cu 2 NiSnS 4 exhibit power conversion efficiency values of 6.18% and 6.12%, respectively, which are comparable to the photovoltaic performance of the DSSCs using a Pt CE (6.09%). [ABSTRACT FROM AUTHOR]
ISSN:09258388
DOI:10.1016/j.jallcom.2016.12.043