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Malaysian Journal of Analytical Sciences, Volume 21, Issue 4, 2017, pp. 928-940

Performance enhancement of dye sensitized solar cell using graphene oxide doped titanium dioxide photoelectrode Peningkatan prestasi bagi sel suria pemeka warna menggunakan grafin oksida di dalam titanium dioksida sebagai fotoelektrod

Abstract :

Dye-sensitized solar cell (DSSCs) is one of the photovoltaic cells that have attracted extensive research over decade. In this study, different weight percentage (wt.%) of graphene oxide (GO) was used with titanium dioxide (TiO2) as photoelectrode in DSSCs. GO was synthesized by simplified Hummer’s method at ambient temperature. The amount of GO in composite film are designed from 0.0 wt.%, 0.4 wt.%, 0.6 wt. % and 0.8 wt.%. The prepared samples were characterized by Field Emission Scanning Electron Microscopy (FESEM), X-ray Diffraction (XRD), Atomic Force Microscopy (AFM) and Incident Photon to Current Efficiency (IPCE). The photocurrent-voltage characteristics of the fabricated dye sensitized solar cells were examined using a solar simulator under 100 mW/cm2AM 1.5 xenon illumination. The results indicated that optimum the power conversion efficiency (PCE) was obtained for the device doped with 0.6 wt.% GO with the short circuit current density (Jsc), open circuit voltage (Voc) and PCE of 9.8 mA/cm2, 0.7 V and 3.7 %, respectively. It was observed that the introduction of 0.6 wt.% GO into TiO2photoelectrode has successfully increased the performance of DSSCs as much as 28% compared to the sample without GO. This is due to the increment in dye absorption and enhanced electron transportation as proven by IPCE analysis. © 2017, Malaysian Society of Analytical Sciences. All rights reserved.

Keywords : Dye sensitized solar cells,Graphene oxide,Photoelectrode,Power conversion efficiency,Titanium dioxide
Subject Area : Analytical Chemistry

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