Enhanced efficiency of dye sensitized solar cell by doping Ba into TiO2 nanoparticle

Enhanced efficiency of dye sensitized solar cell by doping Ba into TiO2 nanoparticle
Author(s):
Ramkumar G, Amutha M
Keywords:
DSSC, Photoanode, Low cost dye, Microwave irradiated method
Abstract
Pure TiO2 and Barium (0.7 wt%) doped TiO2 (BaTiO2) photoanodes have been synthesized by the facile microwave irradiated method. The pure anatase phase of synthesized photoanodes were confirmed by X-ray diffraction patterns. Ba doping in the TiO2 host structure influenced the optical band gap which was studied by Uv-visible spectroscopy. The optical band gap was increased from 3.21 eV for the TiO2 to 3.26 eV for BaTiO2. From the scanning electron microscopy, the particle shape morphology was observed for both TiO2 and BaTiO2 photoanodes. Barium presence in the TiO2 host was endorsed by energy dispersive x-ray spectroscopy (EDS). No other impurities peaks were observed in the synthesized TiO2 and BaTiO2 photoanodes which also confirmed by EDS. Electrochemical impedance spectroscopy shows the charge transfer resistance value was increased for BaTiO2 which helps to reduce the dark current creation in dye sensitized solar cell. BaTiO2 photoanode have 3.24 % conversion efficiency and TiO2 photoanode have 2.1% conversion efficiency.
Article Details
Unique Paper ID: 155095 Publication Volume & Issue: Volume 8, Issue 12 Page(s): 1263 - 1268
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