Synthesis and photoelectric properties of visible sensitive SnS2-linked graphene composites
- Synthesis and photoelectric properties of visible sensitive SnS2-linked graphene composites
- 강미숙; 곽병섭; 이호정
- LITHIUM-ION BATTERIES; LIGHT PHOTOCATALYTIC ACTIVITY; SOLAR-CELLS; SNS2 NANOFLAKES; ANODE MATERIALS; TIN DISULFIDE; CONVERSION EFFICIENCY; OXIDE NANOCOMPOSITES; ELECTRON-TRANSPORT; CARBON NANOTUBES
- Issue Date
- ELSEVIER SCIENCE SA
- CHEMICAL ENGINEERING JOURNAL, v.255, pp.613 - 622
- SnS2-linked graphene (SnS2-rGO) was synthesized from graphene and SnCl2 under mild reducing conditions. X-ray diffraction and transmission electron microscopy of the SnS2-rGO samples confirmed the presence of SnS2 nanoplates that were highly dispersed and well linked onto the thin layered graphene. The SnS2-rGO was introduced as a working electrode into dye-sensitized solar cells (DSSCs) because of its good transparency and electric conductivity. The SnS2-rGO was mixed with p-25 TiO2 powders to make an anode electrode of DSSCs. The graphene and SnS2 exhibited a synergistic effect. Compared to p-25 TiO2-double layered DSSC, the SnS2-rGO-TiO2(upper)/TiO2(bottom) double layered anode film enhanced the energy conversion efficiency considerably; the efficiency for the 1.0 wt.% SnS2-rGO-TiO2(top)/TiO2 (bottom)-DSSC was approximately 5.47%. A potential energy model for electron transfer among TiO2, SnS2-rGO-TiO2, and dye was suggested on the basis of ultraviolet visible spectroscopy and cyclic voltammetry which showed a good relationship with the photovoltaic efficiency. (C) 2014 Elsevier B.V. All rights reserved.
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