The studies of oligoene dyes with different functional groups for DSSCs applications

• Main Author: 謝佩珊
• Other Authors: 葉名倉
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/75384972854657210735

碩士 === 國立臺灣師範大學 === 化學系 === 98 === In this study, ten new donor π-conjugated acceptor (D--A) organic dyes have been engineered and synthesized as sensitizers for the application in dye-sensitized solar cells (DSSCs). The structures of organic dipolar dyes compose of an electron donor (carbazole, dimethylamine, or diphenylamine), a -conjugated framework, and an electron acceptor (carboxylic acid or cyanoacrylic acid). The photophysical and electrochemical properties of these dyes were studied in details.The assembled DSSCs base on these dyes were measured to evaluate the performance. The amount of dye adsorption on TiO2 and the oxidation potential are dependent on the dye structure. The higher performances were obtained by DSSCs based on dye 19. The solar-to-electrical energy conversion efficiency () of 3.03% is achieved under simulated AM 1.5 irradiation (100 mW/cm2) with a DSSC based on dye 19 (Voc = 648 mV, Jsc = 6.68 mA/cm2, ff = 0.70). Density functional theory (DFT) calculations have been performed on the dyes, and the results show that effective charge separation exist in the charge transfer states.