title: Highly efficient CdS/CdSe-sensitized solar cells controlled by the structural properties of compact porous TiO2 photoelectrodes.
abstract: At present, the photovoltaic performance of quantum dot-sensitized solar cells (QDSCs) is still much lower than conventional DSCs. Appropriate porous TiO(2) photoanodes for QDSCs need to be further investigated, and optimization of the nanoparticle-based photoanodes is highly desirable as well. In this article, the influence of the structural properties of various TiO(2) photoanodes on CdS/CdSe-sensitized solar cells have been systematically studied. Quantitative analyses of light-harvesting efficiency (LHE) and electron-transfer yield (Φ(ET)) for the QDSCs are investigated for the first time. It is revealed that the LHE increases in the long wavelength region with the addition of large size TiO(2) particles to the transparent film. In the meantime, the balance between the light scattering and surface area also needs to be controlled, which can significantly restrain the dark current of the device. A double-layer photoanodic structure can give 4.92% of light-to-electricity conversion efficiency with a photoactive area of 0.15 cm(2).
authors.affiliation: Beijing Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Quanxin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Xiaozhi
authors.initials: X
authors.lastname: Guo
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Huang
authors.forename: Shuqing
authors.initials: S
authors.lastname: Huang
authors.forename: Dongmei
authors.initials: D
authors.lastname: Li
authors.forename: Yanhong
authors.initials: Y
authors.lastname: Luo
authors.forename: Qing
authors.initials: Q
authors.lastname: Shen
authors.forename: Taro
authors.initials: T
authors.lastname: Toyoda
authors.forename: Qingbo
authors.initials: Q
authors.lastname: Meng