蒽及其雜環的衍生物應用在染料敏化太陽能電池

Anthracene and its Derivatives for Dye-Sensitized Solar Cells

葉家瑋(Chai-Wei Yeh)

指導教授 ： 周大新

國立中正大學/理學院/化學暨生物化學系/碩士(2013年)

摘要

有機染料敏化電池是利用有機染料吸附於二氧化鈦上，由於近年其效率的提升與成本的降低而受到矚目，染料在有機染料敏化電池中扮演著重要的角色，因此提升染敏化太陽能電池之效率，開發出高效率的染料是不可或缺的條件。
　　本文的主要目的，是合成出以蒽為主體的有機染料，並將這些染料作成實驗用電池。染料的設計上，主要是將蒽作為橋基，利用cyanoacetic acid作為電子受體而合成一系列的化合物。改變橋基上的支鏈，分別使用三異丙基矽(TIPS)以及烷基長鏈，亦或是在橋基上引入雜環結構。藉由這些不同的結構，觀察其效率的變化。
　　在以蒽為橋基的的染料中，以支鏈為正丁基的染料，I-/I3- 為電解質，效率最高，可達到開路電壓為 0.73 V、短路電流為 12.78 mA∙cm-2、填充因子為 0.67、其轉換效率為 6.23 %。
　　而雜環化合物中，以引入噻吩為橋基，並使用三異丙基矽的染料，在二氯甲烷溶液中製作成的元件，離子液體為電解質，效率最高，可達到開路電壓為 0.77 V、短路電流為 10.94 mA∙cm-2、填充因子為 0.68、其轉換效率為 5.46 %。

關鍵字

染料敏化太陽能電池

並列摘要

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.

並列關鍵字

DSSC

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