Issue 14, 2012
From the journal:

Journal of Materials Chemistry

Engineering of metal-free bipyridine-based bridged silsesquioxanes for sustainable solid-state lighting†

Julien Graffion,ab   Xavier Cattoën,b   Vânia T. Freitas,a   Rute A. S. Ferreira,a   Michel Wong Chi Man*b  and  Luís D. Carlos*a  

* Corresponding authors

a Physics Department and CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
E-mail: lcarlos@ua.pt
Fax: +351 234378197
Tel: +351 234370946

b Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, 34296 Montpellier, France
E-mail: michel.wong-chi-man@enscm.fr
Fax: +33 467144353
Tel: +33 467147219

Abstract

We demonstrate an improvement of the emission quantum yield and the luminance figures of merit of metal-free bridged silsesquioxanes—by a factor of 2, 0.43 ± 0.04, and by two orders of magnitude, (1.4 ± 0.1) × 104 cd m−2, respectively—by changing the regioisomer of the silylated precursor. The organic–inorganic hybrids are easily excited by commercial blue InGaN-based light emitting diodes (LEDs) displaying an intriguing potential to applications in green photonics as metal-free phosphors for solid state lighting.

Graphical abstract: Engineering of metal-free bipyridine-based bridged silsesquioxanes for sustainable solid-state lighting

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Article information

DOI
https://doi.org/10.1039/C2JM15225H
Article type
Paper
Submitted
14 Oct 2011
Accepted
20 Jan 2012
First published
24 Feb 2012

J. Mater. Chem., 2012,22, 6711-6715

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Engineering of metal-free bipyridine-based bridged silsesquioxanes for sustainable solid-state lighting

J. Graffion, X. Cattoën, V. T. Freitas, R. A. S. Ferreira, M. W. Chi Man and L. D. Carlos, J. Mater. Chem., 2012, 22, 6711 DOI: 10.1039/C2JM15225H

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