染料敏化太阳能电池天然染料制备及性能分析
Preparation and performance of natural dyes for dye-sensitized solar cells
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摘要: 染料敏化太阳能电池（DSSCs）中的染料可以使光阳极在可见光区具有很好的光吸收能力，从而提高DSSCs的效率.本文利用含有天然色素的植物组织，建立了适用于DSSCs的高效而简单的天然染料制备方案，主要包括植物组织处理、色素提取和染料制备等.其中植物色素的提取部分分别比较了超声、搅拌和浸泡等3种提取方式的差异，最终确定了超声法提取的天然色素具有最佳的提取效果.从23种天然植物组织制备天然染料，通过对其吸收光谱的测定，比较得出吸光性较好的是绿色系、紫色系和红色系的天然染料；通过吸收峰的位置得到其主要成分为类胡萝卜素、花青素和叶绿素a；并且根据吸收峰处吸光度值的大小，初步确定吸光性较好的菠菜、油菜、桑葚、紫甘蓝、山竹果皮、火龙果皮、洛神花适合做DSSCs染料敏化剂的提取.Abstract: In dye of dye-sensitized solar cells (DSSCs),the dye confers good light absorption capability in the visible region to the anode, thereby improving the efficiency of DSSCs. This paper utilized plant tissues with natural dyes, and established a preparation method which was efficient and simple for natural dyes in DSSCs. The preparation method included plant tissue processing, pigment extraction and dyes preparation. For the plant pigment extraction, were compared three extraction methods(ultrasonic, stirring and soaking). The experiments showed the ultrasonic extraction of natural dyes had the best extraction results. Natural dyes were prepared from 23 types of natural plants using ultrasonic method and their UV-Vis absorption spectra were measured. The natural dyes of green, purple and red had preferred light absorption properties. The main components were carotenoids, anthocyanins and chlorophyll a from the position of absorption peak. Based on the absorption peak wave length, spinach, rape, mulberry, purple cabbage, peel mangos teen, dragon fruit skin, rosella were selected as plant for the extraction of DSSCs sensitizer.
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Key words:
- natural dyes /
- light absorbing /
- DSSCs
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