Enhancing power conversion efficiency of DSSC by doping SiO2 in TiO2 photo anodes
| Autor: | K. V. Hemalatha, R. Mariappan, Rajeshwari Sivaraj, Rajendran Venckatesh, K. Balachandran |
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| Rok vydání: | 2015 |
| Předmět: |
Potential well
Materials science Nanocomposite Mechanical Engineering Doping Analytical chemistry Nanoparticle chemistry.chemical_element Condensed Matter Physics Dye-sensitized solar cell Chemical engineering chemistry Mechanics of Materials General Materials Science Fourier transform infrared spectroscopy BET theory Titanium |
| Zdroj: | Materials Science in Semiconductor Processing. 35:59-65 |
| ISSN: | 1369-8001 |
| DOI: | 10.1016/j.mssp.2015.02.071 |
| Popis: | A simple, less time consuming, cost ineffective sol–gel method was used to synthesis TiO 2 nanoparticles (TiO 2 ) and TiO 2 –SiO 2 nanocomposites (TiO 2 –SiO 2 ) using titanium tetra isopropoxide as TiO 2 and silicic acid as SiO 2 precursors respectively. The synthesized nanocomposites were characterized by XRD, SEM, TEM, UV–visible, FTIR and BET analysis. The quantum confinement effect of TiO 2 and TiO 2 –SiO 2 was confirmed by a blueshift observed in UV–visible spectra. The band observed at 950 cm −1 in FTIR analysis confirmed the presence of Ti–O–Si bonds, the TEM analysis shows both the TiO 2 and TiO 2 –SiO 2 were in nanometer size. The BET (Brunauer– Emmett–Teller) specific surface areas of the samples were 65 and 75 m 2 /g for TiO 2 and TiO 2 –SiO 2 respectively. The power conversion efficiency (PCE) of the nanocomposites were studied by using Keithely electrometer and multimeter and it was found to be 2% and 2.5% for eosin-Y sensitized TiO 2 and TiO 2 –SiO 2 nanocomposites respectively. |
| Databáze: | OpenAIRE |
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