Improvement of Hole Transport Materials Pore Filling in Solid-State Dye-Sensitized Solar Cells by Centrifugation

• Main Authors: Jhih-DaHong, 洪誌達
• Other Authors: Yu-Min Yang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/30530023016625213448

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 101 === There are two factors limit the TiO2 potoelectrode thickness of solid state DSSC(only about 2μm) which will cause the efficiency lower than liquid electrolyte-based DSSC. The two factors are electron-hole recombination and incomplete filling of mesoporous TiO2 with HTM. In this study, we forcus on the problem of pore filling and solve the problem by using a new method - centrifugation that replace conventional spin coating for the deposition of the hole transport materials . By centrifugation, we can create a centrifugal force and let the HTM infiltrate into the mesoporous TiO2. The results show that in the devices using the P3HT and dye D131, the efficiency with the optimum parameters of centrifugation (TiO2 thickness:4μm, P3HT:20mg/ml,η:1.71%) is 14% higher than the efficiency with the parameters of spin coating( TiO2 thickness:1.5μm,P3HT:15mg/ml,η:1.5%).And we also study on the effect of devices with dye SQ2 and using centrifugation to deposit P3HT. The results show that the efficiency with the optimum parameters of centrifugation (η:1.26%) is 40% higher than the efficiency with the parameters of spin coating(η:0.9%).In this study we also use centrifugation apply to depositing Spiro-OMeTAD. The result shows that the effect of centrifugation in Spiro-OMeTAD is unapparent compare with P3HT. The reason for this result is that the molecular size of Spiro-OMeTAD is smaller than P3HT. So the problem of pore filling is not so serious for Spiro-OMeTAD compare with P3HT.