| 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: | 75 (Dimensions.ai - last update: 24/11/2024)
66 (OpenCitations - last update: 27/6/2024)
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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. Related Projects
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