title: Pulsed laser deposition of single-crystalline Cu7In3/CuIn0.8Ga0.2Se2 core/shell nanowires.
abstract: Single-crystalline Cu7In3/CuIn0.8Ga0.2Se2 (CI/CIGS) core/shell nanowires are fabricated by pulsed laser deposition with Ni nanoparticles as catalyst. The CI/CIGS core/shell nanowires are made up of single-crystalline CI cores surrounded by single-crystalline CIGS shells. The CI/CIGS nanowires are grown at a considerably low temperature (350°C ~ 450°C) by vapor-liquid-solid mode combined with vapor-solid mode. The distribution density of the nanowires increases with the increasing of the deposition duration, and the substrate temperature determines the lengths of the nanowires. The U-V absorption spectra of the CIGS thin films with and without the CI/CIGS core/shell nanowires demonstrate that the CI/CIGS nanowires can remarkably enhance the absorption of CIGS thin films in the spectrum range of 300 to 900 nm.
  61.46. + w; 61.41.e; 81.15.Fg; 81.07.b.
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China ; Department of Physics, Shanghai Electric Power University, Shanghai 201300, People's Republic of China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Physics, Shanghai Electric Power University, Shanghai 201300, People's Republic of China.
authors.forename: Yan-Yan
authors.initials: YY
authors.lastname: Zhu
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Lei-Lei
authors.initials: LL
authors.lastname: Guan
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Yan-Li
authors.initials: YL
authors.lastname: Li
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Zhi-Feng
authors.initials: ZF
authors.lastname: Ying
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Jia-Da
authors.initials: JD
authors.lastname: Wu
authors.affiliation: Department of Optical Science and Engineering, Key Laboratory for Advanced Photonic Materials and Devices, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Ning
authors.initials: N
authors.lastname: Xu
keywords: CuIn0.8Ga0.2Se2; Light absorption; Nickel catalyst; Pulsed laser deposition; core/shell nanowires