Photo-induced transmittance in copper–selenide nanowires

Effect of hydrogen doping on the loading of titania nanotube films with copper selenide species via alternating current deposition

“…It is reasonable to mention that similar solution has been suggested by us earlier for porous alumina coloring [11][12][13][14]. As seen, in this solution under the constant AC peak-to-peak voltage (U p-to-p ) mode, densely packed crystallites in size of from 60 to 160 nm appear to be deposited mainly at the TiNT film surface.…”

“…No reports, however, have been dedicated to the application of p-type selenide species that can be organized in both stoichiometric (CuSe, Cu 2 Se, CuSe 2 , Cu 2 Se 3 ) or non-stoichiometric (Cu 2-x Se) composition. As reported previously, copper selenide nanowired arrays encased in alumina matrices and glasses behave as a direct band gap of 2.2 to 2.4 eV and an indirect band gap of 1.1-1.7 eV light absorbers [11][12][13][14][15]. Therefore, in this study, we attempted to couple copper selenide species with TiO 2 by alternating current (AC) deposition from appropriate aqueous solution comprising Cu 2?…”

Synthesis and characterization of Cu2Se prepared by hydrothermal co-reduction

“…Thus in recent research works Cu 2−x Se films used in solar cells have been given much attention, such as Cu 2−x Se film prepared by wet chemical method chemical bath deposition technique on glass substrates from CuCl 2 ·2H 2 O, Se powder, Na 2 SO 3 , N(C 2 H 4 OH) and NH 4 OH [3,4]. In the respect of Cu-Se compound nanomaterials, many manufacturing method have been reported, such as CuSe nanomaterials prepared by Qian's group from CuCl 2 ·2H 2 O and Se in dilute aqueous ammonia at 100 • C [5], Cu 2−x Se nanoparticles prepared by sol-gel method [6], Cu 2−x Se film and nanoparticles prepared by chemical vapor deposition [7], copper selenide nanowire arrays within the alumina pores prepared by electrochemical synthesis in water solution [8], Cu 1.7 Se nanowires synthesized by electrochemical deposition assisted by aluminium template [9]. The optical properties of CuSe particles prepared * Corresponding authors.…”

Annealing Effects on the Metal and Semiconductor Nanowires Loaded Inside the Alumina Pores

“…Furthermore, it has been demonstrated that nm-sized crystals and nanowires of Cu 1.75 Se and Cu 3 Se 2 encased in the transparent alumina template demonstrate nonlinear absorption features at 1.06 μm (Statkutė et al 2008;Juška, et al 2009a). We have found that Cu 3 Se 2 /alumina greenish tints, characteristic of these films, upon its annealing in ambient atmosphere even at a moderate temperature of 150 o C became yellow.…”