title: Solution fabrication and photoelectrical properties of CuInS₂ nanocrystals on TiO₂ nanorod array.
abstract: 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.
authors.affiliation: Key Lab for Special Functional Materials of Ministry of Education, Henan University, Kaifeng 475004, China.
authors.forename: Zheng-Ji
authors.initials: ZJ
authors.lastname: Zhou
authors.forename: Jun-Qi
authors.initials: JQ
authors.lastname: Fan
authors.forename: Xia
authors.initials: X
authors.lastname: Wang
authors.forename: Wei-Zhong
authors.initials: WZ
authors.lastname: Sun
authors.forename: Wen-Hui
authors.initials: WH
authors.lastname: Zhou
authors.forename: Zu-Liang
authors.initials: ZL
authors.lastname: Du
authors.forename: Si-Xin
authors.initials: SX
authors.lastname: Wu