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

详细信息    查看全文

• 作者：Libo Yu ; Xuefeng Ren ; Zirong Yang ; Yuqi Han…
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：27
• 期：7
• 页码：7150-7160
• 全文大小：2,503 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

Highly ordered TiO₂ nanowire (NW) arrays were constructed by hydrothermal process as support materials for quantum dot sensitized solar cells (QDSSCs). The CdS_xSe_1−x alloyed quantum dots (QDs) with tunable composition have been assembled onto the TiO₂ NW arrays via a facile hydrothermal method to form CdS_xSe_1−x/TiO₂ NW photoanodes. The light absorption range of the CdS_xSe_1−x/TiO₂ NW photoanodes can be controlled by changing the atomic ratio of S to Se. Based on CdS_xSe_1−x/TiO₂ NW photoanodes, the photovoltaic performance of these CdS_xSe_1−x/TiO₂ NW solar cells gradually improved as the increase of Se content in CdS_xSe_1−x alloyed QDs. Among all sample CdS_xSe_1−x/TiO₂ NW solar cells which were prepared with different feed molar ratio of S:Se, the CdS_0.27Se_0.73/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 CdS_xSe_1−x/TiO₂ NW photoanodes, which contribute to the enhanced photovoltaic performance of the CdS_0.27Se_0.73/TiO₂ NW solar cell.Electronic supplementary materialThe online version of this article (doi:10.1007/s10854-016-4678-z) contains supplementary material, which is available to authorized users.