Double-shell CeO2@ TiO2 hollow spheres composites with enhanced light harvesting and electron transfer in dye-sensitized solar cells

摘要

A new double-shell hollow structured material with high light harvesting and dye loading level for dyesensitized solar cells (DSSCs) were synthesized via a one-pot hydrothermal method. When coated with TiO2 shell, a hybrid double-shell CeO2@TiO2 hollow sphere (D-CeO2@TiO2) was performed as scattering layer in dye-sensitized solar cells, which further increase conversion efficiency from 5.27% of bare TiO2 electrode to 7.95%. The enhancement is due to the high dye loading capacity of double shell CeO2 hollow spheres core and high electron transport capacity of TiO2 shell. Our work provides a feasible strategy for preparing multi-shell hollow spheres as scattering layers for high performance solar cells. (C) 2017 Elsevier B.V. All rights reserved.