Qiu Xiaofeng, Chen Ling, Gong Haibo, Zhu Min, Han Jun, Zi Min, Yang Xiaopeng, Ji Changjian, Cao Bingqiang
Key Lab of Inorganic Functional Material in Universities of Shandong, School of Material Science and Engineering, University of Jinan, Jinan 250022, China.
Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany.
J Colloid Interface Sci. 2014 Sep 15;430:200-6. doi: 10.1016/j.jcis.2014.05.057. Epub 2014 Jun 6.
Arrays of ZnO/CdS/CdSe core/shell nanocables with different annealing temperatures have been investigated for CdS/CdSe quantum dots sensitized solar cells (QDSSCs). CdS/CdSe quantum dots were synthesized on the surface of ZnO nanorods that serve as the scaffold via a simple ion-exchange approach. The uniform microstructure was verified by scanning electron microscope and transmission electron microscope. UV-Visible absorption spectrum and Raman spectroscopy analysis indicated noticeable influence of annealing temperature on the interface structural and optical properties of the CdS/CdSe layers. Particularly, the relationship between annealing temperatures and photovoltaic performance of the corresponding QDSSCs was investigated employing photovoltaic conversion, quantum efficiency and electrochemical impedance spectra. It is demonstrated that higher cell efficiency can be obtained by optimizing the annealing temperature through extending the photoresponse range and improving QD layer crystal quality.
针对硫化镉/硒化镉量子点敏化太阳能电池（QDSSCs），研究了不同退火温度下的氧化锌/硫化镉/硒化镉核壳纳米电缆阵列。通过简单的离子交换方法，在用作支架的氧化锌纳米棒表面合成了硫化镉/硒化镉量子点。通过扫描电子显微镜和透射电子显微镜验证了均匀的微观结构。紫外可见吸收光谱和拉曼光谱分析表明，退火温度对硫化镉/硒化镉层的界面结构和光学性质有显著影响。特别是，采用光伏转换、量子效率和电化学阻抗谱研究了退火温度与相应QDSSCs光伏性能之间的关系。结果表明，通过优化退火温度，扩展光响应范围并提高量子点层晶体质量，可以获得更高的电池效率。
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