Colloidal PbS Nanosheets with Tunable Energy Gaps. Issue 1726 (15th May 2015)

• Record Type: Journal Article
• Authors: Jiang, Zhoufeng; Khan, Simeen; Premathilake, Shashini; Bhandari, Ghadendra; Subedi, Kamal; He, Yufan; Leopold, Matthew; Reilly, Nick; Lu, Peter; Zayak, Alexey; Sun, Liangfeng
• Editors: Bar-Sadan, M.; Cheon, J.; Kar, S.; Terrones, M.
• Is Part Of: MRS proceedings. Issue 1726:(2015)
• Publication Date: 2015-05-15
• Subjects: chemical synthesis, -- colloid, -- nanostructure; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/opl.2015.463
• Languages: English
• ISSNs: 0272-9172

Abstract

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/L 2 ( L is the thickness of the nanosheet), which is consistent with results calculated using density functional theory as well as tight-binding theory.