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Issue 2, 2019
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Flexible nanophosphor films doped with Mie resonators for enhanced out-coupling of the emission

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Abstract

Herein, we present a general method to prepare self-standing flexible photoluminescent coatings of controlled opacity for integration into light-emitting diodes (LEDs) employing cost-effective solution-processing methods. From colloidal suspensions of nano-sized phosphors, we fabricate light-emitting transparent films that can be doped with spherical scatterers, which act as Mie resonators that trigger a controlled photoluminescence enhancement, evidenced by the reduction of the guided light along the layer. This results in an enhanced emission compared to that extracted from a bare phosphor layer. We show not only that emission is visible under ultraviolet-LED illumination for both rigid and flexible versions of the coatings, but we also prove the feasibility of the integration of these flexible conversion layers into such devices. We believe these results can contribute to develop more efficient and cost-effective illumination sources by providing efficient and easy-to-handle conversion layers susceptible to excitation by LEDs emitting at wavelengths in the near UV region.

Graphical abstract: Flexible nanophosphor films doped with Mie resonators for enhanced out-coupling of the emission

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Supplementary files

Article information


Submitted
05 Oct 2018
Accepted
20 Nov 2018
First published
07 Dec 2018

This article is Open Access

J. Mater. Chem. C, 2019,7, 267-274
Article type
Paper

Flexible nanophosphor films doped with Mie resonators for enhanced out-coupling of the emission

J. M. Miranda-Muñoz, D. Geng, M. E. Calvo, G. Lozano and H. Míguez, J. Mater. Chem. C, 2019, 7, 267
DOI: 10.1039/C8TC05032E

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