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Issue 31, 2014
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Investigations on PVP/Y3BO6:Eu3+, a red luminescent composite for lighting devices based on near UV-LEDs

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Abstract

This work deals with a red phosphor, Y3BO6:Eu3+, and its corresponding poly(N-vinylpyrrolidone) (PVP)/Y3BO6:Eu3+ luminescent composite film suitable for applications in the next generation of Hg-free lamps based on near ultraviolet (UV) light emitting diodes (LEDs). Well crystallized samples of Y3BO6 powders with the Eu3+ content up to 20 mol% were prepared by the Pechini method. After structural, morphological and optical characterization, the best doping rate of Eu3+ in the matrix was determined to be 15 mol%. This optimal powder, which is highly friable, was easily ground into fine particles and homogeneously dispersed into a PVP polymer solution to give rise to a polymer phosphor composite. Structural and optical features of the composite film have been studied and compared to those of a pristine PVP film and Y3BO6:Eu3+ powder. All the characterization (XRD, SAXS, luminescence…) proved that the red phosphor particles are well incorporated into the polymer composite film which exhibited the characteristic red emission of Eu3+ under UV light excitation. Furthermore, photostability of the polymer/phosphor composite film under UV-LED irradiation was evaluated from exposure to accelerated artificial photoageing at wavelengths above 300 nm.

Graphical abstract: Investigations on PVP/Y3BO6:Eu3+, a red luminescent composite for lighting devices based on near UV-LEDs

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Publication details

The article was received on 20 Mar 2014, accepted on 25 May 2014 and first published on 28 May 2014


Article type: Paper
DOI: 10.1039/C4TC00560K
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J. Mater. Chem. C, 2014,2, 6301-6311

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    Investigations on PVP/Y3BO6:Eu3+, a red luminescent composite for lighting devices based on near UV-LEDs

    N. Pradal, D. Boyer, G. Chadeyron, S. Therias, A. Chapel, C. V. Santilli and R. Mahiou, J. Mater. Chem. C, 2014, 2, 6301
    DOI: 10.1039/C4TC00560K

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