| Summary: | 碩士 === 國立中正大學 === 化學暨生物化學研究所 === 101 === Dye-sensitized solar cells (DSSCs) based on organic dyes adsorbed on nanocrystalline TiO2 electrodes have received considerable attention because of their high incident solar light to-electricity conversion efficiency and low cost. A number of organic dyes have so far been developed and the relationship between their chemical structures and the photovoltaic performances of DSSCs based on the dyes has been studied. To create high-performance DSSCs, it is important to develop effective organic dye sensitizers, which should be optimized for the chemical structures to possess good light-harvesting features, to provide good electron communication between the dyes and a TiO2 electrode, and to control the molecular arrangements on the TiO2 electrode. The aim of this paper is to the design and synthesis of organic dyes for DSSCs.
Four new anthracene derivative organic dyes that were designed and synthesized as sensitizers for application in DSSCs. For these dyes, the anthracene derivative moiety and the cyanoacetic acid were functioned as the bridge and the electron acceptor respectively, and alkyl chain or triisopropylsilyl (TIPS) acetylene as the branched chain. The triisopropylsilyl acetylene is the first time used into the DSSCs.
The anthracene derivative showed the best photovoltaic performance: a short-circuit photocurrent density (JSC) of 12.78 mA cm-2 an open-circuit voltage (VOC) of 0.73 V and a fill factor (FF) of 0.64, corresponding to an overall conversion efficiency of 6.23% under standard global AM 1.5 solar light conditions.
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