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Issue 43, 2015
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Investigation of the size–property relationship in CuInS2 quantum dots

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Abstract

In this work we investigated fundamental properties of CuInS2 quantum dots in dependence of the particle size distribution (PSD). Size-selective precipitation (SSP) with acetone as poor solvent was performed as an adequate post-processing step. Our results provide deep insight into the correlation between particle size and various optical characteristics as bandgap energy, absorption and emission features and the broadness of the emission signal. These structure–property relationships are only achieved due to the unique combination of different analytical techniques. Our study reveals that the removal of 10 wt% of smallest particles from the feed results in an enhancement of the emission signal. This improvement is ascribed to a decreased quenching of the emission in larger particles. Our results reveal the impact of PSDs on the properties and the performance of an ensemble of multicomponent QDs and anticipate the high potential of controlling PSDs by well-developed post-processing.

Graphical abstract: Investigation of the size–property relationship in CuInS2 quantum dots

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Supplementary files

Article information


Submitted
27 Jun 2015
Accepted
19 Sep 2015
First published
25 Sep 2015

Nanoscale, 2015,7, 18105-18118
Article type
Paper

Investigation of the size–property relationship in CuInS2 quantum dots

T. Akdas, J. Walter, D. Segets, M. Distaso, B. Winter, B. Birajdar, E. Spiecker and W. Peukert, Nanoscale, 2015, 7, 18105
DOI: 10.1039/C5NR04291G

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