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Zinc quinolate complex decorated CuInS2/ZnS core/shell quantum dots for white light emission

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Abstract

Herein, we report the fabrication of a single component white light emitting (WLE) nanocomposite – following the formation of a luminescent zinc quinolate complex (using 8-hydroxyquinoline (HQ) as a complexation agent) on the surface of the ZnS shell of CuInS2/ZnS core/shell quantum dots. The synchronous contribution of greenish blue emission by the zinc quinolate surface complex and red emission by the CuInS2/ZnS core/shell quantum dots led to white light generation from the nanocomposite upon UV excitation. The reported nanocomposite exhibited bright natural cool white light emission with chromaticity color coordinates of (0.32, 0.35) and (0.32, 0.33), color rendering indices (CRI) of 91 and 83 and correlated color temperatures (CCT) of 6087 K and 5930 K in the solution and solid phase, respectively. Importantly, the higher temperature (up to 200 °C) sustainable white light emitting nature and long term stability of the solid nanocomposite may have importance for solid state light emitting applications.

Graphical abstract: Zinc quinolate complex decorated CuInS2/ZnS core/shell quantum dots for white light emission

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Publication details

The article was received on 21 Apr 2017, accepted on 30 Jun 2017 and first published on 03 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC01751K
Citation: J. Mater. Chem. C, 2017, Advance Article
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    Zinc quinolate complex decorated CuInS2/ZnS core/shell quantum dots for white light emission

    S. Pramanik, S. Bhandari and A. Chattopadhyay, J. Mater. Chem. C, 2017, Advance Article , DOI: 10.1039/C7TC01751K

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