Graphene Oxide/ Polyaniline Nanocomposites for Dye Sensitized Solar Cells

• Main Authors: Yu-Chen Hsu, 許瑜珍
• Other Authors: 李榮和
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/86392766951057474814

碩士 === 國立中興大學 === 化學工程學系所 === 101 === In this study, graphene oxide (GO)/polyaniline(PANI) nanocomposites have been used for electrode and electrolyte in dye sensitized solar cells (DSSCs).. In the fisrt part: GO/PANI nanocomposite thin film was coated on a FTO glass by in situ polymerization and and self-assembly process for counter electrode of DSSC. SEM images confirmed the formation of the composite film GO/PANI with higher surface area on the FTO coated substrate. High electro-catalytic ability and low charge transfer resistance of GO/PANI counter electrode were characterized through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The short-circuit current density (Jsc) and power-conversion efficiency (η) of the DSSC based on the GO/PANI counter electrode are about 14.94 mAcm-2 and 6.55%, which is comparable to the the cell with conventional Pt counter electrode . In the second part: the photovoltaic (PV) properties of the DSSCs were enhanced by incorporating the GO/PANI nanocomposite into the PEO gel electrolyte. The GO/PANI nanocomposite materials serve simultaneously both as the extended electron transfer materials and as catalysts for the electrochemical reduction of I3-. Because of a higher catalytic activitiy and a higher diffusion coefficient of I3- , the incorporation of GO/PANI nanocomposite into the gel electrolyte is favorable for the reduction of the charge transfer resistances of DSSC. G40P has the best catalytic activitiy as compared to those of the PANI and GO/PANI nanocomposites (G2P and G4P). Therefore, better PV efficiency (5.63%) was observed for the DSSC incorporating GO/PANI nanocomposite G40P.