We report a high energy conversion efficiency of 8.4% at 100 mW cm-2, which is one of the highest values for N719-based, solid-state, dye-sensitized solar cells (ssDSSCs). Our solar cells are based on one-dimensional (1D) hierarchical hetero-nanotubes consisting of Au cores and SnO2/TiO2 nanosheet double shells (referred to as Au@SnO2@TNSs). Carbonaceous nanofibers (CNFs) with tellurium (Te) cores are used as dual templates for the inner-deposition of gold and the outer-deposition of the metal oxide layers. An organized mesoporous TiO2 (OM-T) film, with high porosity, large pores, and good interconnectivity, is also prepared via a graft copolymer template approach and utilized as a matrix to disperse the 1D hierarchical nanostructures. Such nanostructures provide good pore-filling for solid electrolytes, faster electron transfer, and enhanced light scattering, as confirmed by reflectance spectroscopy, incident photon-to-electron conversion efficiency (IPCE) spectroscopy, and intensity-modulated photocurrent spectroscopy (IMPS)/intensity-modulated photovoltage spectroscopy (IMVS). This journal is
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© The Royal Society of Chemistry 2015.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)