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Colloidal PbS Nanosheets with Tunable Energy Gaps

Published online by Cambridge University Press:  15 May 2015

Zhoufeng Jiang ,
Simeen Khan ,
Shashini Premathilake ,
Ghadendra Bhandari ,
Kamal Subedi ,
Yufan He ,
Matthew Leopold ,
Nick Reilly ,
Peter Lu  and
Alexey Zayak
...Show all authors
Zhoufeng Jiang
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A. Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Simeen Khan
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Shashini Premathilake
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A. Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Ghadendra Bhandari
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Kamal Subedi
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Yufan He
Affiliation:
Department of Chemistry, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Matthew Leopold
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Nick Reilly
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Peter Lu
Affiliation:
Department of Chemistry, Bowling Green State University, Bowling Green, OH 43403, U.S.A. Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Alexey Zayak
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A. Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
Liangfeng Sun
Affiliation:
Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, U.S.A. Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, U.S.A.
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Abstract

Ultrathin colloidal PbS nanosheets are synthesized using organometallic precursors with chloroalkane cosolvents, resulting in tunable thicknesses ranging from 1.2 nm to 4.6 nm. We report the first thickness-dependent photoluminescence spectra from lead-salt nanosheets. The one-dimensional confinement energy of these quasi-two-dimensional nanosheets is found to be proportional to 1/L instead of 1/L2 (L is the thickness of the nanosheet), which is consistent with results calculated using density functional theory as well as tight-binding theory.

Keywords

chemical synthesiscolloidnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1726: Symposium J – Emerging Non-Graphene 2D Atomic Layers and van der Waals Solids , 2015 , mrsf14-1726-j07-06
Copyright
Copyright © Materials Research Society 2015 

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References

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