改性金莲花色素敏化太阳能电池的性能研究

发布时间：2018-09-17 12:24

【摘要】：染料敏化太阳能电池(DSCs)中,高原天然染料敏化剂花青素由于分子中含有多个羟基基团,有助于其与TiO_2有效结合形成有效的电子注入通道,从而表现出优异的性能,但同时由于远离二氧化钛光阳极部分的羟基易吸收水分,容易增加电荷复合同时电池性能下降,因此本研究通过对花青素进行化学改性来解决该问题。首先从高原金莲花中提取天然染料,并通过紫外可见吸收光谱和红外吸收光谱测试,确定所获取的产物主要成分为花青素;在此基础上对所获得的花青素分子进行化学改性,通过酯化反应去除部分多余的羟基基团。将所获得的改性产物用于DSC中,相比于未改性的花青素敏化电池,光伏性能得到了明显的改善,开路电压提高了30 m V。
[Abstract]:In dye-sensitized solar cell (DSCs), anthocyanin, a natural dye sensitizer in plateau, has many hydroxyl groups in the molecule, which is helpful to form an effective electron injection channel by combining with TiO_2, thus showing excellent performance. But at the same time because the hydroxyl group which is far away from the titanium dioxide photoanode is easy to absorb water and the charge is increased and the performance of the battery is decreased the anthocyanin is chemically modified to solve the problem. At first, the natural dyes were extracted from the lotus flower of the plateau, and the main components of the obtained products were determined by UV-Vis absorption and infrared absorption spectra, and the anthocyanin molecules were chemically modified on this basis. Some excess hydroxyl groups were removed by esterification. Compared with the unmodified anthocyanin-sensitized cell, the photovoltaic performance of the modified product was obviously improved and the open circuit voltage was increased by 30 MV compared with the unmodified anthocyanin sensitized cell.
【作者单位】：青海大学;清华大学新型陶瓷与精细工艺国家重点实验室;青海民族大学;青海黄河水电新能源分公司;
【基金】：国家自然科学基金(51362025) 青海省三江源项目(2010-N-S03) 青海省昆仑学者计划清华大学新型陶瓷与精细工艺国家重点实验室开放基金
【分类号】：TM914.4

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