双吸附基团卟啉敏化剂的合成及其太阳能电池研究.doc

文档介绍：
双吸附基团卟啉敏化剂的合成及其太阳能
电池研究#
王跃强,解永树**
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(华东理工大学结构可控先进功能材料及其制备教育部重点实验室,精细化工研究所,
上海 200237)
摘要:本文设计、合成了一个以三苯胺作为供电子基团,以对乙炔基苯甲酸为电子受体具有
D-π-A 结构的卟啉类敏化染料 5,通过核磁共振氢谱进行了结构表征。该染料在卟啉 meso
位引入了两个含有炔基的吸附基团,这样既可以有效增加染料在二氧化钛膜上的吸附,又可
以使染料的吸收光谱红移。紫外-可见吸收光谱表明,染料的最长吸收波长可达 750 nm,这
样可以提高染料捕获太阳能的效率。在标准 AM 太阳光照射下,染料 5 的电池器件短
路电流密度为 mA/cm2,开路电压为 634 mV,填充因子为 ,光电转换效率为
%。
关键词:卟啉;染料敏化;太阳能电池
中图分类号:O641
A Novel Porphyrin Sensitizer with Two Electron-acceptor
Groups for Dye-sensitized Solar Cells
WANG Yueqiang, XIE Yongshu
(Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University
of Science & Technology, ShangHai 200237)
Abstract: In this work, a novel porphyrin dye 5 with triphenylamine groups introduced as electron
donors and 4-ethynylbenzoic acids as the electron-acceptor groups has been synthesized and
utilized as a sensitizer for dye-sensitized solar cells (DSSCs). Its structure is characterized by
1H-NMR. The introduction of two electron-acceptor groups with two alkynyl groups linked to the
meso-positions of the dye can efficiently increase the adsorption on TiO2 and result in pronounced
red shift of the absorption spectrum. Consequently, the absorption spectrum of 5 extends to the
near-IR region (750 nm) so as to enhance the ability of the dye to harvest solar energy. The solar
cell based on