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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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Publication details

The article was received on 27 Jun 2015, accepted on 19 Sep 2015 and first published on 25 Sep 2015


Article type: Paper
DOI: 10.1039/C5NR04291G
Citation: Nanoscale, 2015,7, 18105-18118
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    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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