Experimental study on the dye-sensitized solar cells using combustion synthesis of TiO2 nanoparticles
Date Issued
2008
Date
2008
Author(s)
Lin, Hun-Chang
Abstract
Flame synthesis of nanosized titanium oxide particles with the precursor titanium isopropoxide (TTIP) were studied by the modified Hencken burner. Particles produced in these flames were studied for their morphology, crystal phase purity, and size. Results from X-ray diffraction (XRD) analyses show that TiO2 crystal phase purity may be effectively controlled by the oxygen concentration, and the size of TiO2 nanoparticles is highly depending on the TTIP loading and the collecting height of the flame. Also, purer (anatase: 97.7 %) and smaller (about 25 nm) anatase TiO2 nanoparticles are formed under the conditions of TTIP=200NL/min, O2/N2=40/60, H=3.0 cm andΦ=1.0. Furthermore, dye-sensitized solar cells are successfully developed by using a dye-sensitized nanocrystalline TiO2 film. Dye-sensitized TiO2 solar cells, DSSC, are a promising alternative for the development of a new generation of photovoltaic devices. DSSC are a successful combination of materials, consisting of a transparent electrode coated with a dye-sensitized mesoporous film of nanocrystalline particles of TiO2, an electrolyte containing a suitable redox-couple and a carbon black coated counter-electrode. Alizarin yellow and chlorophyllin are used as the dyesensitizers. The light-to-energy conversion performance of the cell depends on the relative energy levels of the semiconductor and dye and on the kinetics of the electron-transfer processes at the sensitized semiconductor electrolyte interface. The rate of these processes depends on the properties of its components. This contribution presents a discussion on the influence of each of the materials which constitute the DSSC of the overall process for energy conversion.
Subjects
Nanoparticles
TiO2
Synthesis
DSSC
SDGs
Type
thesis
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