Thickness-tunable synthesis of Two-dimensional PbS/CdS heterostructure.

POSTER

Abstract

Emissive PbS/CdS core/shell nanosheets are synthesized using cation-exchange methods. A significant blue-shift of the photoluminescence is observed, indicating a stronger quantum confinement in the PbS core as its thickness is reduced to eight atomic layers. High resolution transmission-electron-microscopy images of the cross-sections of the core/shell nanosheets show atomically sharp interfaces between PbS and CdS. Accurate analysis of the thickness of each layer reveals the relationship between the energy-gap and the thickness in an extremely one-dimensionally confined nanostructure. Photoluminescence lifetime of the core/shell nanosheets is significantly longer than the core-only nanosheets, indicating better surface passivation which means a more significant potential for energy application.

Authors

  • Zhoufeng Jiang

    Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Bowling Green State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University

  • Mikhail Zamkov

    University of Notre Dame, University of Toledo, Case Western Reserve University, John Carroll University, Bowling Green State Univ, Materials Science and Technology Division, Oak Ridge National Laboratory, Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Ohio University, Shanghai Jiao Tong University, Department of Chemistry and Biochemistry, University of Toledo, Department of Chemical Engineering, University of Toledo, Wuhan University, Southeast University, Physics and Astronomy and Center for Photochemical Science, Bowling Green State University, Physics and Astronomy, University of Toledo, Air Force Research Laboratory, Physics and Astronomy, Bowling Green State University, Purdue University, Student/Supervisor, Student, None, University of Michigan, Dearborn, Clemson University, Michigan State University, Bowling Green State University, Physics Dep, Cleveland State University, Physical Therapy Program, Central Michigan State University