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Highlights: [•] CdS QDs were attached to TiO2 nanorod arrays via a one-step in situ hydrothermal route. [•] GSH molecule could link the CdS QDs onto the surface of TiO2 nanorods. [•] The photoanode exhibited a maximum η of 0.278% with the J sc of 1.95mAcm−2. [ABSTRACT FROM AUTHOR]

Highlights: [•] Ti-doped α-Fe2O3 nanorod arrays were prepared by hydrothermal method. [•] The effect of Ti ions on Ti-doped α-Fe2O3 was studied by electrochemistry techniques. [•] Ti-doped α-Fe2O3 exhibits a photocurrent density of 0.72mA/cm2 at 0.23V vs. Ag/AgCl. [Copyright &y& Elsevier]

Abstract: Zn-doped TiO2 microspheres have been synthesized by introducing a trace amount of zinc nitrate hexahydrate to the reaction system. Scanning electron microscope (SEM), field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) have been utilized to characterize the samples. Both surface photovoltage spectroscopy (SPS) technique based on lock-in amplifier and transient photovoltage (TPV) measurement reveal that the slight doping of Zn can promote the separation of photo-generated charges as well as restrain the recombination due to the strong interface built-in electric field and the decreasing of surface trap states. The photovoltaic parameters of dye-sensitized solar cells (DSSCs) based on Zn-doped TiO2 are significantly better, compared to that of a cell based on undoped TiO2. The relation between the performance of DSSCs and their photovoltaic properties is also discussed. [Copyright &y& Elsevier]