Carbon-coated three-dimensional WS<inf>2</inf>film consisting of WO<inf>3</inf>@WS<inf>2</inf>core-shell blocks and layered WS<inf>2</inf>nanostructures as counter electrodes for efficient dye-sensitized solar cells
MetadataShow full item record
© 2018 Elsevier Ltd The possibility of using solar energy for electricity generation has inspired intensive enthusiasm on the development of solar cell devices. This work reports the synthesis of a novel counter electrode (CE) composed of WO x @WS 2 @carbon core-shell film and compares its electrical and electrocatalytic performances with other two CEs of WO x /carbon film and conventional Pt in the dye-sensitized solar cells (DSSCs). The WO x @WS 2 @carbon CE was prepared by a sulfurization treatment of a mesoporous WO x /carbon film coated on fluorine-doped tin oxide (FTO) glass. The well-interconnected three-dimensional (3D) WS 2 structure with coated carbon film provides high electrocatalytic activity and fast reaction kinetics for the reduction of triiodide to iodide due to its sufficient active sites on 3D WS 2 framework containing surface edge-oriented nanosheets and the facile electron transfer and electrolyte diffusion via the continuously carbon layer. Photovoltaic performance tests indicate the DSSC device with the counter electrode of WO x @WS 2 @carbon core-shell achieved the power conversion efficiency (PCE) of 7.71% compared favourably with the values of 6.00% from WO x /carbon CE and 7.34% from conventional Pt CE. Such results vividly mirror that the developed WO x @WS 2 @carbon core-shell can replace the conventional Pt film, realizing Pt-free counter electrodes for DSSCs.
Showing items related by title, author, creator and subject.
Porous titanium nitride microspheres on Ti substrate as a novel counter electrode for dye-sensitized solar cellsWang, G.; Liu, Shaomin (2015)Porous titanium nitride (TiN) microspheres film is directly prepared on a Ti substrate by a hydrothermal process in HF solution followed by nitridation in ammonia atmosphere. The prepared porous TiN microspheres film on ...
Wang, D.; Wang, Y.; Zou, Y.; Lu, Chunsheng; Ma, Zengsheng (2018)© 2018 Springer-Verlag GmbH Austria, part of Springer Nature High-capacity active electrodes, such as Si anodes in Li-ion batteries, undergo a significant volume deformation of up to (Formula presented.) 400% during ...
3D core–shell architecture from infiltration and beneficial reactive sintering as highly efficient and thermally stable oxygen reduction electrodeChen, D.; Yang, G.; Ciucci, F.; Tade, Moses; Shao, Zongping (2014)Solid oxide fuel cells (SOFCs) as alternatives for energy conversion have the capacity to overcome low energy conversion efficiency, highly detrimental emissions from traditional fuel utilization and the limited reserves ...