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Photocatalytic activity of TiO2-capped ZnO nanoparticles [electronic resource]
, Article Journal of Materials Science: Materials in Electronics ; 2011 , Vol. 23, Issue 2, P.361-369 ; Simchi, A. (Abdolreza) ; Nemati, Ziarat Ali ; Sharif University of Technology
Abstract
Using a combined hydrothermal and sol–gel route, TiO2-capped ZnO nanoparticles with an average size of 60 nm were prepared. The titania shell was amorphous with a thickness of ~10 nm. Formation of Zn2TiO4 phase at higher calcination temperature was noticed. Effects of Ti/Zn molar ratio and coating time on the thickness of TiO2 shell and the photoactivity of the particles for decolorization of Methylene Blue (MB) under UV lamp irradiation (3 mW/cm2) were investigated. The nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, fourier-transform infrared spectrometry (FTIR), diffuse reflectance spectroscopy (DLS), and atomic absorption spectroscopy. Analysis of...
Synthesis and Evalouation of photovoltaic Properties of Lead-halid Perovskite
, M.Sc. Thesis Sharif University of Technology ; Simchi, Abdolreza (Supervisor) ; Ashouri, Hossein (Supervisor)
Abstract
Organometal lead halides due to their interesting optical properties and convenient synthesis processing have attracted many attention recently. In this project, fabrication of lead halide perovskite solar cells through one-step deposition and two-step deposition with different holding time of PbI2 layers in various concentration of CH3NH3I solution as a second precursor within the ambient and glove box atmosphere has been studied. Structural, microscopic and photovoltaic properties of fabricated solar cells were evaluated. Moreover effect of delay time during PbI2 deposition on TiO2 mesoporous layer in performance of perovskite solar cell using Energy Dispersive Spectroscopy was studied....