Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST), Yuseong, Daejeon, Republic of Korea.
Nanotechnology. 2011 Jan 7;22(1):015202. doi: 10.1088/0957-4484/22/1/015202. Epub 2010 Dec 6.
We report that the use of a chemically deposited ZnO energy barrier between a CdS quantum dot sensitizer and TiO(2) nanotubes (TNTs) can improve the efficiency of quantum dots-sensitized solar cells (QDSCs). The experimental results show that the formation of the ZnO layers over TNTs significantly improved the performances of the CdS QDSCs based on the TNTs electrodes. In particular, a maximum photoconversion efficiency of 4.6% was achieved for the CdS/ZnO/TNTs electrode under UV-visible light illumination, corresponding to an increase of 43.7% as compared to the CdS/TNTs electrode without the ZnO layers. The improved CdS QDSCs efficiency is attributed to the suppressed recombination of photoinjected electrons with redox ions from the electrolyte resulting from the ZnO energy barrier layers.
我们报告称，在 CdS 量子点敏化剂和 TiO(2) 纳米管（TNTs）之间使用化学沉积的 ZnO 能垒可以提高量子点敏化太阳能电池（QDSCs）的效率。实验结果表明，在 TNTs 上形成 ZnO 层显著提高了基于 TNTs 电极的 CdS QDSCs 的性能。特别是，在紫外可见光照射下，CdS/ZnO/TNTs 电极的光转换效率达到了 4.6%，与没有 ZnO 层的 CdS/TNTs 电极相比，增加了 43.7%。CdS QDSCs 效率的提高归因于 ZnO 能垒层抑制了光注入电子与电解质中氧化还原离子的复合。
