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Authors: Yolanda Justo, P. Geiregat, Karen Van Hoecke, Frank Vanhaecke, Celso de Mello Donga, Zeger Hens
Title: Optical Properties of PbS/CdS Core/Shell Quantum Dots
Format: International Journal
Publication date: 10/2013
Journal/Conference/Book: Journal of Physical Chemistry C
Editor/Publisher: ACS, 
Volume(Issue): 117(39) p.20171–20177
DOI: 10.1021/jp406774p
Citations: 50 (Dimensions.ai - last update: 13/6/2021)
21 (OpenCitations - last update: 19/4/2021)
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Abstract

We determine the optical properties of PbS/CdS core/shell QDs, addressing the energy and the oscillator strength of the first exciton transition and the intrinsic absorption coefficient at short wavelength. It follows that the intrinsic absorption coefficient at wavelengths of 350 and 400 nm agrees with theoretical numbers, predicted using the Maxwell-Garnett model. Moreover, close correspondence is demonstrated between the energy and the oscillator strength of the first exciton transition of PbS/CdS core/shell and PbS QDs with a similar core size. This provides a straightforward way to estimate the PbS core diameter in PbS/CdS core/shell quantum dots by means of the PbS sizing curve and it indicates that PbS/CdS QDs exhibit a type 1 band alignment.

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