Versatile PbS Quantum Dot Ligand Exchange Systems in the Presence of Pb-Thiolates

Aabhash Shestha; Yanting Yin; Gunther G Andersson; Nigel A Spooner; Shizhang Qiao; Sheng Dai

doi:10.1002/smll.201602956

Versatile PbS Quantum Dot Ligand Exchange Systems in the Presence of Pb-Thiolates

Small. 2017 Feb;13(5). doi: 10.1002/smll.201602956. Epub 2016 Nov 18.

Authors

Aabhash Shestha¹, Yanting Yin², Gunther G Andersson², Nigel A Spooner^{3

4}, Shizhang Qiao¹, Sheng Dai^{1

3

4}

Affiliations

¹ School of Chemical Engineering, The University of Adelaide, SA, 5005, Australia.
² Flinders Centre for NanoScale Science and Technology, Flinders University, PO Box 2100, Adelaide, SA, 5001, Australia.
³ School of Physical Sciences, Department of Physics, The University of Adelaide, SA, 5005, Australia.
⁴ DST Group, PO Box 1500, Edinburgh, SA, 5111, Australia.

PMID: 27860268
DOI: 10.1002/smll.201602956

Abstract

A robust solution phase ligand exchange system for lead sulfide (PbS) quantum dots (QDs) in the presence of Pb-thiolate ligands is presented that can better preserve the excitonic absorption and emission features as compared to the conventional ligands. The photoluminescence after ligand exchange of PbS QDs with Pb-thiolate ligand is preserved up to 78% of the original oleate capped PbS QDs.

Keywords: lead sulfide; ligand exchange; quantum dots; thiols.

Publication types

Research Support, Non-U.S. Gov't