Preparation method of visible-light response natural dye for dye-sensitized solar cell

The invention discloses a preparation method of a visible-light response natural dye for a dye-sensitized solar cell. The method comprises the following steps: crushing a plant raw material containing a visible-light response pigment, mixing with absolute ethyl alcohol, and carrying out ultrasonic treatment and evaporation to obtain the visible-light response natural dye. The visible-light response natural dye is formed by mixing natural pigments extracted from various plants in proportion, compared with natural pigments extracted from a single plant, the absorption intensity in the visible-light spectrum range is improved, and the photoelectric conversion efficiency of the dye-sensitized solar cell prepared from the visible-light response natural dye is also obviously improved. 本发明公开了一种用于染料敏化太阳能电池的可见光响应天然染料的制备方法，是将含有可见光响应色素的植物原料粉碎后，与无水乙醇混合并进行超声与蒸发，从而获得。本发明的可见光响应天然染料由多种植物提取的天然色素按比例混合而成，与单一植物提取的天然色素相比，在可见光光谱范围内的吸收强度提高，所制作的染料敏化太阳能电池的光电转化效率也明显提升。