The preparation and assembly of CdSxSe1-x alloyed quantum dots on TiO2 nanowire arrays for quantum dot-sensitized solar cells

被引：14
作者：
Yu, Libo [1 ]
Ren, Xuefeng [1 ]
Yang, Zirong [1 ]
Han, Yuqi [1 ]
Li, Zhen [1 ]
机构：
[1] Hexi Univ, Coll Chem & Chem Engn, Zhangye City 734000, Gansu, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2016年 / 27卷 / 07期
关键词：
THIN-FILMS; NANOCRYSTALS; EFFICIENCY; NANOTUBE; PBS;
D O I：
10.1007/s10854-016-4678-z
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Highly ordered TiO2 nanowire (NW) arrays were constructed by hydrothermal process as support materials for quantum dot sensitized solar cells (QDSSCs). The CdSxSe1-x alloyed quantum dots (QDs) with tunable composition have been assembled onto the TiO2 NW arrays via a facile hydrothermal method to form CdSxSe1-x/TiO2 NW photoanodes. The light absorption range of the CdSxSe1-x/TiO2 NW photoanodes can be controlled by changing the atomic ratio of S to Se. Based on CdSxSe1-x/TiO2 NW photoanodes, the photovoltaic performance of these CdSxSe1-x/TiO2 NW solar cells gradually improved as the increase of Se content in CdSxSe1-x alloyed QDs. Among all sample CdSxSe1-x/TiO2 NW solar cells which were prepared with different feed molar ratio of S:Se, the CdS0.27Se0.73/TiO2 NW solar cell (prepared with S:Se = 0:4) produced the highest power conversion efficiency up to 2.46 %. The results of investigation into optical properties and incident photon-to-current conversion efficiency indicates that the enlarged light absorption range and effective photo-to-electrical efficiency can be obtained with Se-rich CdSxSe1-x/TiO2 NW photoanodes, which contribute to the enhanced photovoltaic performance of the CdS0.27Se0.73/TiO2 NW solar cell.
引用
收藏
页码：7150 / 7160
页数：11
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