title: CdS and CdSe quantum dots subsectionally sensitized solar cells using a novel double-layer ZnO nanorod arrays.
abstract: We report a novel approach for synthesizing CdS and CdSe quantum dots subsectionally sensitized double-layer ZnO nanorods for solar cells, which are comprised of CdS QDs-sensitized bottom-layer ZnO NRs and CdSe QDs-sensitized top-layer ZnO NRs. X-ray diffraction study and scanning electron microscopy analysis indicate that the solar cells of subsectionally sensitized double-layer ZnO NRs, which are the hexagonal wurtzite crystal structure, have been successfully achieved. The novel structure enlarged the range of absorbed light and enhanced the absorption intensity of light. The I-V characteristics show that the double-layer structure improved both the current density (J(sc)) and fill factor (FF) by 50%, respectively, and power conversion efficiency (η) was increased to twice in comparison with the CdS QDs-sensitized structure.
authors.affiliation: Electronic Materials Research Laboratory (EMRL), Key Laboratory of Education Ministry, International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049, China.
authors.forename: Jianping
authors.initials: J
authors.lastname: Deng
authors.forename: Minqiang
authors.initials: M
authors.lastname: Wang
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Song
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Shi
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Zhang