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Issue 14, 2015
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Phase dependent visible to near-infrared photoluminescence of CuInS2 nanocrystals

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Abstract

Nanocrystals of CuInS2 with the hexagonal wurtzite structure hold great potential for applications requiring efficient energy transport, such as photocatalysis, due to their anisotropic crystal structure. However, thus far their optical properties have proven difficult to study, as luminescence from wurtzite nanocrystals has only recently been observed. In this work, we report the colloidal synthesis of single crystalline, luminescent CuInS2 nanocrystals with both the cubic and hexagonal structures. The crystalline phase, optical properties and mechanism of formation of nanocrystals are controlled by changing the reaction temperature. Photoluminescence is observed in the visible and near-infrared spectral regions, which results from the cubic and hexagonal nanocrystals respectively. Synthetic studies combined with XRD, TEM and EDS mapping provide evidence for the mechanisms behind phase selection.

Graphical abstract: Phase dependent visible to near-infrared photoluminescence of CuInS2 nanocrystals

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Supplementary files

Article information


Submitted
14 Jan 2015
Accepted
06 Feb 2015
First published
06 Feb 2015

This article is Open Access

J. Mater. Chem. C, 2015,3, 3258-3265
Article type
Paper
Author version available

Phase dependent visible to near-infrared photoluminescence of CuInS2 nanocrystals

A. D. P. Leach, L. G. Mast, E. A. Hernández-Pagán and J. E. Macdonald, J. Mater. Chem. C, 2015, 3, 3258
DOI: 10.1039/C5TC00134J

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