Mora-Seró Iván, Giménez Sixto, Moehl Thomas, Fabregat-Santiago Francisco, Lana-Villareal Teresa, Gómez Roberto, Bisquert Juan
Departament de Física, Universitat Jaume I, 12071 Castelló, Spain.
Nanotechnology. 2008 Oct 22;19(42):424007. doi: 10.1088/0957-4484/19/42/424007. Epub 2008 Sep 25.
Colloidal CdSe quantum dots (QDs) of different sizes, prepared by a solvothermal route, have been employed as sensitizers of nanostructured TiO(2) electrode based solar cells. Three different bifunctional linker molecules have been used to attach colloidal QDs to the TiO(2) surface: mercaptopropionic acid (MPA), thioglycolic acid (TGA), and cysteine. The linker molecule plays a determinant role in the solar cell performance, as illustrated by the fact that the incident photon to charge carrier generation efficiency (IPCE) could be improved by a factor of 5-6 by using cysteine with respect to MPA. The photovoltaic properties of QD sensitized electrodes have been characterized for both three-electrode and closed two-electrode solar cell configurations. For three-electrode measurement a maximum power conversion efficiency near 1% can be deduced, but this efficiency is halved in the closed cell configuration mainly due to the decrease of the fill factor (FF).
通过溶剂热法制备的不同尺寸的胶体CdSe量子点（QDs）已被用作基于纳米结构TiO₂电极的太阳能电池的敏化剂。三种不同的双功能连接分子被用于将胶体量子点连接到TiO₂表面：巯基丙酸（MPA）、巯基乙酸（TGA）和半胱氨酸。连接分子在太阳能电池性能中起着决定性作用，这一点从以下事实可以看出：相对于MPA，使用半胱氨酸时，入射光子到电荷载流子产生效率（IPCE）可提高5至6倍。量子点敏化电极的光伏特性已针对三电极和封闭式两电极太阳能电池配置进行了表征。对于三电极测量，可以推断出最大功率转换效率接近1%，但在封闭式电池配置中，该效率减半，主要是由于填充因子（FF）的降低。
