Effect of Carbon Modification on the Electrical, Structural, and Optical Properties of TiO2 Electrodes and Their Performance in Labscale Dye-Sensitized Solar Cells
作者： R Taziwa , EL Meyer , E Sideras-Haddad , RM Erasmus , E Manikandan
DOI: 10.1155/2012/904323
关键词: Conductivity 、 Solar cell 、 Nanoparticle 、 Materials science 、 Analytical chemistry 、 Particle 、 Dye-sensitized solar cell 、 Anatase 、 High-resolution transmission electron microscopy 、 Raman spectroscopy
摘要: Carbon-modified titanium dioxide nanoparticles (C:TiO2 NPs) have been synthesized by ultrasonic nebulizer spray pyrolysis (USP) and pneumatic (PSP) techniques. HRTEM on the NPs shows difference in lattice spacing NP structures prepared two methods—2.02 A for USP an average of 3.74 PSP NPs. The most probable particle sizes are 3.11 nm 5.5 nm, respectively. Raman spectroscopy supported FTIR confirms TiO2 polymorph to be anatase with intense phonon frequency at 153 cm−1 blue-shifted from 141 cm−1 ascribed both carbon doping size. modified confinement model has used extract dispersion other parameters first time. Electronic measurements show “negative conductance” some critical bias voltage, which is characteristic n-type conductivity carbon-doped as confirmed calculated areas under I-V curves, a property suited solar cell applications. Practical cells built electrodes up 1.5 times improvement efficiency compared pure similar construction.
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