Improved conversion efficiency of CdS quantum dot-sensitized TiO2 nanotube-arrays using CuInS2 as a co-sensitizer and an energy barrier layer

Supported Noble Metals on Hydrogen‐Treated TiO2 Nanotube Arrays as Highly Ordered Electrodes for Fuel Cells

“…The successive ion layer adsorption and reaction (SILAR) method is a very powerful thin film growth technique for CdS shell layers. [33] Instead of creating a thin film, SIAR was used to synthesize the Pd nanoparticles. Typically, the TNT samples were firstly sensitized for 8 min by using an aqueous solution of SnCl 2 (0.1 m) and HCl (0.1 m).…”

Photocurrent enhancement of the CdS/TiO 2 /ITO photoelectrodes achieved by controlling the deposition amount of Ag 2 S nanocrystals

“…A typical strategy of the co-sensitization is employed to achieve a wide wavelength of light absorption. Co-sensitizing the TiO 2 photoelectrodes with different QDs with complementary absorption spectra has been reported previously [16,[26][27][28][29][30][31]. It is known that Ag 2 S with a narrow band gap of 0.9 to 1.05 eV and a larger absorption coefficient [32][33][34] can absorb light with longer wavelength (>500 nm).…”

“…However, the application of TiO 2 as the photoelectrode is limited by its relatively large band gap of 3.2 eV (anatase), which makes the TiO 2 photoelectrode absorb solar light in the ultraviolet (UV) region only. Therefore, to extend the light absorption of the TiO 2 photoelectrodes into the visible light region, various types of semiconductor QDs such as CdS [10][11][12][13], CdTe [10,14], CuInS 2 [15][16][17], Ag 2 S [18][19][20], and PbS [21][22][23] have been used as sensitizers to sensitize the TiO 2 photoelectrodes. Compared with organic dyes, inorganic semiconductor QDs are superior in solar light absorbing ability due to their size-tunable absorption and high absorption coefficient [24,25].…”

Ag nanoparticle-deposited TiO2 nanotube arrays for electrodes of Dye-sensitized solar cells

“…Alternatively, vertically aligned TiO 2 architectures such as nanorod and nanotube arrays that offer longer electron diffusion lengths (decreased charge recombination rate) and shorter electron transport time should be fabricated. Among various architectures, the most promising one for solar energy conversion appears to be TiO 2 nanotube (TNT) arrays prepared through anodization of titanium [5][6][7][8][9][10]. Remarkably enhanced charge collection efficiency and light scattering in DSSCs fabricated with TNT arrays grown on a Ti foil were reported previously by comparing to DSSCs with conventional TiO 2 nano-particulate films [6].…”