Solution fabrication and photoelectrical properties of CuInS₂ nanocrystals on TiO₂ nanorod array.
Solution fabrication and photoelectrical properties of CuInS₂ nanocrystals on TiO₂ nanorod array.
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DOI：
10.1021/am200500k
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发表时间：
2011-06
影响因子：
9.5
通讯作者：
Zhengji Zhou;Jun Fan;Xia Wang;Wei Sun;Wenhui Zhou;Z. Du;Sixin Wu
中科院分区：
文献类型：
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作者：
Zhengji Zhou;Jun Fan;Xia Wang;Wei Sun;Wenhui Zhou;Z. Du;Sixin Wu
一维半导体结构由于其优异的电荷传输和优异的光收集效率而在制备光伏太阳能电池中受到关注。本研究直接在透明导电玻璃（FTO）上生长垂直排列的单晶TiO(2)纳米棒阵列，然后通过旋涂方法在纳米棒阵列上沉积CuInS(2)纳米晶，形成TiO(2)/CuInS(2)异质结构薄膜。通过场发射扫描电子显微镜 (FESEM)、透射电子显微镜 (TEM)、高分辨率 TEM 和 X 射线衍射 (XRD) 证实了所得的纳米结构组装和成分。紫外可见吸收光谱（UV-vis）数据表明，与裸TiO(2)纳米棒阵列相比，纳米复合膜的吸光度延伸到可见光区域。表面光电压光谱（SPS）还显示出与吸收光谱相对应的新的增强响应区域。这些结果表明，FTO光电极上新型CuInS(2)纳米晶敏化TiO(2)纳米棒阵列在光伏器件中具有潜在的应用。
One-dimensional semiconductor architectures are receiving attention in preparing photovoltaic solar cells because of its superior charge transport as well as excellent light-harvesting efficiency. In this study, vertically aligned single-crystalline TiO(2) nanorods array was grown directly on transparent conductive glass (FTO), and then CuInS(2) nanocrystals were deposited on nanorods array by spin coating method to form TiO(2)/CuInS(2) heterostructure films. The resulting nanostructure assembly and composition was confirmed by field-emission scanning electron microscope (FESEM) , transmission electron microscopy (TEM), high-resolution TEM, and X-ray diffraction(XRD). Ultraviolet-visible absorption spectroscopy (UV-vis) data indicates that the absorbance of the nanocomposite film extended into the visible region compared with bare TiO(2) nanorod arrays. The surface photovoltage spectra (SPS) also showed a new and enhanced response region corresponding to the absorption spectrum. These results suggest that the novel CuInS(2) nanocrystals sensitized TiO(2) nanorod array on FTO photoelectrodes has a potential application in photovoltaic devices.