Application of carbon materials as counter electrodes of dye-sensitized solar cells

• Main Authors: Chien-Nan Wu, 巫建男
• Other Authors: Kuo-Sheng Kao
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/61570193187453647448

碩士 === 樹德科技大學 === 電腦與通訊研究所 === 97 === TiO2 thin films were deposited on ITO/Glass substrates using sol-gel method and spin coating in this study. The rapid thermal annealing (RTA) is used to process TiO2 thin films for drying and sintering. The counter electrode of carbon film is prepared using doctor blade method and than dried at 150℃ for 30min.It exhibits a sheet resistance of 30(ohm/sq.)for carbon film thickness of 50μm. A solution of 0.5M Li+0.05M I2+0.5M 4-tert-butypyridine (TBP) is mixed evenly as electrolyte. The physical characteristics of TiO2 thin films deposited on ITO/Glass substrate with various processing parameters were surveyed by means of the analyses of XRD and SEM. The crystalline of TiO2 film dried at 300℃ was amorphous, while the films annealed 450℃ to 550℃ contained anatase crystallized. Furthermore, the (101) peak is in evidences appearance with the increase of the annealing temperature, and the grain size is also grew up. The grain size of the films is 14nm as the layers of film increased of 20 layers‚which thickness is about 1.66μm. Otherwise‚while the films of 20 layers annealed to 550℃‚the thickness of film decrease to 1.03μm. It can be seen the thickness of films have deduced after annealed. Experimental results reveal that the processing parameters of TiO2 thin film and carbon thin films will influence on the photovoltaic properties.