Growth of colloidal PbS nanosheets and the enhancement of their photoluminescence

Zhoufeng Jiang; Ghadendra B. Bhandari; Shashini M. Premathilaka; Simeen Khan; Douglas M. Dimick; Cody Stombaugh; Angelic Mandell; Yufan He; H. Peter Lu; Liangfeng Sun

doi:10.1039/C5CP03140K

Growth of colloidal PbS nanosheets and the enhancement of their photoluminescence†

Zhoufeng Jiang,^ab Ghadendra B. Bhandari,‡^a Shashini M. Premathilaka,^ab Simeen Khan,^a Douglas M. Dimick,^a Cody Stombaugh,^a Angelic Mandell,^a Yufan He,^bc H. Peter Lu^bc and Liangfeng Sun*^ab

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^a Department of Physics and Astronomy, Bowling Green State University, Bowling Green, OH 43403, USA
E-mail: lsun@bgsu.edu

^b Center for Photochemical Sciences, Bowling Green State University, Bowling Green, OH 43403, USA

^c Department of Chemistry, Bowling Green State University, Bowling Green, OH 43403, USA

Abstract

Dual photoluminescence peaks observed during the synthesis of colloidal PbS nanosheets reveal their growth mechanism – two-dimensional attachments of the quantum dots. Well-grown nanosheets show the photoluminescence linewidth of 95 meV at room temperature. Aged nanosheets in toluene have enhanced photoluminescence with intensity improved by an order of magnitude.

Physical Chemistry Chemical Physics

Growth of colloidal PbS nanosheets and the enhancement of their photoluminescence†

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Growth of colloidal PbS nanosheets and the enhancement of their photoluminescence

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