Research of Increasing Photoelectric Conversion Efficiency For DSSC

• Main Authors: Chih-Chou Chang, 張志州
• Other Authors: Feng-Chyi Duh
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/89883829129429087233

碩士 === 大華技術學院 === 機電研究所 === 99 === In the past twenty years, dye-sensitized solar cell (DSSC) has received more attentions from academia and industry. Through continuous research and development, though the photoelectric conversion efficiency of DSSC has exceeded 11% for cell using titanium dioxide, but still about two times lower than silicon solar cell. To overcome this limitation, this study developed many new designs to increase photoelectric conversion efficiency. In Part 1 of this study presented a new concept with effective way to increase the light flux of the incident light to enter the cell, and it can also increase the illumination area for the purpose of increasing the input light flux. It’s mainly utilize the feature of double sides receivable of the DSSC, it combine the design of the light reflective piece and DSSC, it can increases the illumination area and light flux of the incident light and makes the output of the single DSSC for double raise. In testing this reflection apparatus, we were surprised to find that the angle of the light reflective piece adjusted to the angle of 45°, the increasement of maximum output power achieved to 48.8%. However, the light reflective piece at the angle of 60°, the light flux of incident light will achieve the optimum condition. In Part 2 of this study, a new concept was used, which including optimal thickness of TiO2 electrode, sacttering layer and application of Ag reflector on the DSSC-module. The morphology of electrode, I-V curves, photospectral were investigated. From the results, the conversion efficiency increase with the increase of nano-TiO2 electrode thickness, which is upto 5.94%. As DSSC-module with a Ag reflector, the conversion efficiency is upto 6.44%. On the other hand, the nano-TiO2 electrode with 4.5μm scattering layer has the best conversion efficiency of 7.04%. From above reults, the cell performance of DSSC module which TiO2 electrode with sacttering layer is better than that of constructd with an Ag reflector.