title: Efficient CdPbS quantum dots-sensitized TiO2 photoelectrodes for solar cell applications.
abstract: CdPbS quantum dots-sensitized TiO2 photoelectrode was prepared using chemical bath codeposition technique by dipping TiO2 film into a 0.5 M Cd(NO3)2-Pb(NO3)2 solution (molar ratio 9:1) and a 0.5 M Na2S methanol solution. The CdPbS quantum dots have the size about 4 to 6 nm and distribute homogeneously in the TiO2 film. The as-prepared electrode showed improved absorption spectra. The assembled quantum dots-sensitized solar cell (QDSSC) yielded a power conversion efficiency (nu) of 1.88% and a short-circuit current of 15.28 mA/cm2 under AM 1.5 illumination of 100 mW/cm2, far outperformed the single PbS, CdS QDSSC and the nu increased 49.2% than coupled PbS/CdS QDSSC. The solar cell presented IPCE peak value of 45.7% and the effective photovoltaic range covers the visible region and near infrared region.
authors.affiliation: Wuhan National Laboratory for Optoelectronics-Huazhong, University of Science and Technology, Wuhan, HuBei 430074, P. R. China.
authors.forename: Ting
authors.initials: T
authors.lastname: Shu
authors.forename: Zi-Ming
authors.initials: ZM
authors.lastname: Zhou
authors.forename: Heng
authors.initials: H
authors.lastname: Wang
authors.forename: Guang-Hui
authors.initials: GH
authors.lastname: Liu
authors.forename: Peng
authors.initials: P
authors.lastname: Xiang
authors.forename: Yao-Guang
authors.initials: YG
authors.lastname: Rong
authors.forename: Yuan-Di
authors.initials: YD
authors.lastname: Zhao
authors.forename: Hong-Wei
authors.initials: HW
authors.lastname: Han