TiO2-based solar cells sensitized by chemical-bath-deposited few-layer MoS2

Herein, we reported a novel MoS2/TiO2 heterostructure inorganic solar cell based on chemical-bath deposition of MoS2 in the mesoporous TiO2 three-dimensional network. Raman spectrum indicated the existence of MoS2 and suggested a few-layer structure with peaks at 384 cm(-1) and 405.5 cm(-1). HRTEM images further confirmed the few-layer structure of MoS2 (3-7 layers). With deposited MoS2, UV absorption spectra of TiO2 photoanode film indicated a considerably enhanced absorption in the visible region. Both annealing and careful control of the thickness of MoS2 sensitized layer could optimize the photovoltaic performance. The reason for the enhanced photovoltaic performance of the novel inorganic solar cell was also explained in detail. (C) 2014 Elsevier B.V. All rights reserved.