Details

Autor(en) / Beteiligte

• Rojas-González, Francisco E.
• Hernández-Negrete, Ofelia
• Esparza-Ponce, Hilda E.
• Hernández-Paredes, Javier

Titel

A method to decorate the surface of LiNbO3:Eu3+ powders with EuNbO4 nanoparticles

Ist Teil von

• Journal of alloys and compounds, 2020-07, Vol.830, p.154688, Article 154688

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Lithium niobate (LiNbO3) is an inorganic material of great interest to optoelectronic technologies because of its good electro-optical properties. There are several approaches to produce changes in its microstructure or to engineering multi-component systems. In this work, we present an easy and efficient route for obtaining powders of europium doped lithium niobate (LiNbO3:Eu3+) decorated with europium orthoniobate (EuNbO4) nanoparticles (50–150 nm). This multi-component system, namely LiNbO3:Eu3+-EuNbO4 hereafter, has been obtained as powders through mechanochemistry processing of the precursors followed by heat treatments. The powders were structurally characterised by Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The EuNbO4 nanoparticles have been grown from the LiNbO3:Eu3+ grains displaying coherent interfaces. Moreover, LiNbO3:Eu3+ and EuNbO4 phases showed a high degree of crystallinity. Also, the system LiNbO3:Eu3+-EuNbO4 showed strong violet luminescence with CIE 1931 chromaticity coordinates x = 0.28376 and y = 0.23270 and CCT of 16859 K, which makes this system a candidate for building light-emitting devices for medical and biological applications. EuNbO4 nanoparticles have grown attached to the surface of LiNbO3:Eu3+ grains. [Display omitted] •Powders of LiNbO3:Eu3+ decorated with EuNbO4 nanoparticles (50–150 nm) were obtained by solid-state reaction.•LiNbO3:Eu3+ and EuNbO4 phases showed high degree of crystallinity.•EuNbO4 nanoparticles have grown on the surface of LiNbO3:Eu3+ grains.•The system displayed intense luminescence (purple-violet) with CCT of 16859 K.