Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Phys Chem Chem Phys. 2012 May 14;14(18):6479-86. doi: 10.1039/c2cp40568g. Epub 2012 Mar 28.
A series of ordered photoanodic architectures (including ordered TiO(2) nanotube arrays (TNT), ZnO nanorods, ZnO/TiO(2) core/shell nanostructures) for CdS/CdSe sensitized solar cells (QDSCs), were fabricated directly on transparent conductive oxide glasses by a facile sol-gel assisted template process. The morphologies, optical and electrical properties of TNTs and CdS/CdSe co-sensitized TNTs have been demonstrated. The effect of CdSe deposition time on the cell performance was clarified, and the growth mechanism of the CdSe quantum dots on the surface of the TNTs has been proposed as well. Furthermore, the evolution of open-circuit photovoltage (V(oc)) towards CdSe deposition time has been investigated by electrochemical impedance spectroscopy (EIS). A promising light-to-electricity conversion efficiency of up to 4.61% has been achieved with 3 μm long TNT arrays, which is the best record for sandwich-type ordered TNT-based QDSCs.
一系列有序的光阴极结构（包括有序 TiO2 纳米管阵列（TNT）、ZnO 纳米棒、ZnO/TiO2 核/壳纳米结构）被直接在透明导电氧化物玻璃上通过一种简单的溶胶-凝胶辅助模板工艺制备，用于 CdS/CdSe 敏化太阳能电池（QDSCs）。已经证明了 TNTs 和 CdS/CdSe 共敏化 TNTs 的形态、光学和电学性质。阐明了 CdSe 沉积时间对电池性能的影响，并提出了 CdSe 量子点在 TNTs 表面生长的机制。此外，通过电化学阻抗谱（EIS）研究了开路光电压（V（oc））随 CdSe 沉积时间的演变。具有 3 μm 长 TNT 阵列的高达 4.61%的有前途的光电转换效率已经实现，这是三明治型有序 TNT 基 QDSCs 的最佳记录。
