新型有機染料的設計、合成與太陽能元件的應用

Design and Synthesis of Novel Organic Dyes and Devices Application

蘇家誼(Jia-Yi Su)

指導教授 ： 汪根欉

國立臺灣大學/理學院/化學研究所/博士(2012年)

https://doi.org/10.6342/NTU.2012.03091

摘要

我們利用染料直立吸附於 TiO2 的特性，對染料TPCA 進行結構修飾產生具有熱聚合能力的VTPCA。藉由控制染料的排列密度，引發合聚後的染料足以防止電解質過度擴散，降低電解質的干擾，達到抑制載子復合的目的。結構未修飾的TPCA 元件僅得到4.04 %的效率，熱聚合染料VTPCA 將效率提升至5.74 %，增幅達42.1 %。
除此之外，針對TiO2 表面的活性中心距離為10Å，我們也設計了一系列具有不同結構特色的雙錨基染料，其兩錨基距離為10Å 或其整數倍，如：dTPCA、ICZDTA、BPDTA 等等。此類型染料擁有強烈的吸附力及高消光係數，對於元件的長效性與效能皆能有正面的幫助。

關鍵字

染料 ； 太陽能電池 ； 熱聚 ； 雙錨基

並列摘要

A simple method uses to reduce the electron recombination in dye-sensitized solar cells (DSSCs) is demonstrated. The new dye molecule VTPCA equipped with
thermal cross-linkable styryl group can undergo polymerization during the annealing step of device fabrication to generate an electrolyte-blocking shell, which can impede the undesirable electron recombination with the electrolyte. The Jsc, Voc, FF of the solar cell sensitized with VTPCA are 9.83 mA cm-2, 0.74 V, and 0.73, respectively, yielding an overall conversion efficiency of 5.31 %. The result acquires 31.4 % improvement on device efficiency comparing to the unmodified device. In addition,
with the incorporation of co-adsorbent chenodeoxycholic acid (CDCA) and cross-linkable repair additive 4,4’-divinyltriphenylamine (DVTP), the optimized device with a robust shell shows an overall 42.1 % enhancement over the basic model device.
In addition, we have designed another series of di-anchoring dyes based on the distance of TiO2 surface active site (ie: 10 or 20 Å), such as DTPCA, ICZDTA and BPDTA. These dyes have both highly binding affinity and extinction coefficient, which are two required components to develop high efficiency DSSCs.

並列關鍵字

DSSC ； dye ； solar cell ； thermal crosslinking ； di-anchor

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