| Summary: | 碩士 === 國立聯合大學 === 光電工程學系碩士班 === 107 === In the thesis, we used the new organic materials to replace the conventional expensive metal complex materials as absorption layer in dye-sensitized solar cells (DSSCs). We designed two types of organic dye, one group (TPCOOH, TPCOOHb, CBZCOOH, and CBZCOOHb) consist of AZO units as π-conjugated spacer with different electron donor and electron acceptor, another were designed with phenothiazine units (PTA) as π-conjugated spacer, cyanoacetic acid as the acceptor and different electron donor. The effect material structures and concentrations of organic dye to the DSSCs were discussed.
The optical analysis of the organic dyes was done and the devices were fabricated with various concentration of organic dye. The optimums device showed the efficiency of 0.95% with TPCOOH, 1.02% with TPCOOHb, 0.13% with CBZCOOH, 6.30% with TC6PTA and 6.33% with cC6PTA. However, the device efficiency was only 0.06~0.07% with CBZCOOHb in all concentrations. We could observe that conversion efficiency can be effect by the dye molecule design and different concentration.
Furthermore, we used TC6PTA and cC6PTA dyes as the absorber and replace the Pt CEs with carbon black and cobalt composite materials (CoCB) in DSSCs. When CEs was CoCB, the conversion efficiency of the TC6PTA component was 5.85% and the conversion efficiency of the cC6PTA component was 5.86%. The average difference of conversion efficiency between the two pairs of CEs was 0.46%, indicating that the overall performance of CoCB CEs for organic materials was not inferior to Pt CEs.
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