應用於染料敏化太陽能電池之新穎雙錨基材料的設計與合成

Design and Syntheses of Novel Di-anchoring Materials for Dye-Sensitized Solar Cells

羅鈞元(Chun-Yuan Lo)

指導教授 ： 汪根欉

國立臺灣大學/理學院/化學研究所/碩士(2014年)

https://doi.org/10.6342/NTU.2014.00299

摘要

在過去的一二十年間，日益增加的能源需求以及對於全球暖化的關注正促使不污染環境的再生能源的發展，利用光伏打科技將太陽能轉換為電力提供一個永續的方法來解決上述議題。相較於目前市場上以矽基為主太陽能電池，染料敏化太陽能電池和有機太陽能電池都被視為有高度希望以及經濟合算的替代物。
文獻中已經有大部分的染料設計概念都是以D-π-A為主，而本文設計了兩款新穎染料，BPDTA、BTTA，以類螺旋結構的形式將兩個具有予體受體的發色基團綁定，其雙錨基距離為12.07 A (距離接近TiO2表面的活性中心距離)。以類螺旋結構為中心且帶有四條長碳鏈的雙錨基染料，設計原理是為了要抑制分子堆疊而發生自身猝滅的機率，其中BTTA染料效率高達6.86 %，在元件效率表現上相較於對照染料 (單錨基染料)好，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

染料敏化太陽能電池 ； 雙錨基

並列摘要

Increasing energy demands and the impact of global warming have been arisen huge need of renewable energy from environmentally benign resources in the past few decades. Conversion of solar energy into electricity via photovoltaic technologies provide the sustainable approaches to satisfy these issues. Both of dye-sensitized solar cells (DSSCs) and organic solar cells (OSCs) have been regarded as highly promising and cost-effective alternatives to the market dominated by silicon-based counterparts.
A donor-(π-conjugated spacer)-acceptor (D-π-A) system is the most widely adopted molecular architecture for organic dyes in DSSCs. The new dyes, BPDTA、BTTA, featuring two donor/acceptor chromophores aligned in a spiro-like configuration with two anchoring groups separated at a distance of 12.07 A (closely matching the distance between the adsorption sites of the anatase TiO2 surface) , a spiro-like configured central unit, and four n-heaxyl chains to diminish intermolecular interactions and suppress molecular aggregation were synthesized for efficient DSSCs with a high PCE of 6.86 % . As compared to the rod-shape of the mono-anchoring D-π-A analogue dye, the cross shape of the bi-anchoring D-π-A branched dyes are highly-efficienct sensitizers for DSSCs. Furthermore, these dyes have highly binding affinity and extinction coefficient, which are two required factors to develop high efficiency DSSCs.

並列關鍵字

Dye-Sensitized Solar Cells ； Di-anchoring

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