pH值对金莲花染料敏化太阳能电池性能的影响

摘要

Trol ius chinensis pigment was extracted, and ultraviolet-visible (UV-Vis) absorption and Fourier transform infrared (FTIR) spectroscopy confirmed that anthocyanin compounds were the main components. Dye sensitized solar cel s (DSCs) were sensitized from the natural pigments dissolved in different pH solutions. Open-circuit voltage increased with increasing pH,while short-circuit current density first increased and then decreased, attributed to an anthocyanin structural change with pH value. The highest observed power conversion efficiency was 0.292%at pH=5.%　　首先从高原金莲花中提取天然染料，通过紫外-可见(UV-Vis)吸收光谱和傅里叶变换红外(FTIR)吸收光谱确定其主要成分为花色苷.调节色素溶液的pH值，组装染料敏化太阳能电池(DSCs)并进行光电性能测试.研究发现，随着pH值的升高，电池的开路电压逐渐升高，但是短路电流密度却先升高后降低.分析认为这是由于在不同pH值下，花色苷的结构会发生转换造成的.在pH=5时，该天然染料敏化太阳能电池的光电转换效率最高，达到0.292%.