Design of LaPO4:Nd3+ materials by using ionic liquids

作者：Cybinska J^*; Guzik M; Lorbeer C; Zych E; Guyot Y; Boulon G; Mudring A V

来源：Optical Materials, 2017, 63: 76-87.

DOI：10.1016/j.optmat.2016.09.025

• Orthophosphates
• Ionic liquids assisted synthesis
• Neodymium doping
• NIR emitting phosphors

Monoclinic monazite-type Nd3+-doped lanthanum orthophosphate (LaPO4:Nd3+) nanoparticles were prepared by microwave treatment of simple lanthanide precursors such as Nd(OAc)(3)center dot xH(2)O, OAc = acetate) with task-specific dihydrogen phosphate ionic liquids (ILs) 1-butyl-1-methylpyrrolidinium dihydrogenphosphate- BmPyrH(2)PO(4) (IL1) and 2-hydroxyethyl-N,N,N-trimethylammonium, [choline][H2PO4) (112) as the reaction medium, reactant and in-situ nanoparticle stabilizer.
This synthesis route possesses many advantages as it is a fast and facile preparation method of the desired phosphate nanomaterials without the necessity for post-reaction heat treatment to obtain the anhydrous high temperature monazite phosphate phase.
The nano-sized phosphors Nd3+:LaPO4 were carefully analyzed by the powder X-ray diffraction, electron microscopy and spectroscopic techniques taking advantage of the Nd3+ spectroscopic probe to analyze in detail the structural properties. Applied high resolution low temperature absorption and emission techniques allowed to complete the structural information unavailable from the XRD powder patterns.
A clear influence of the used task-specific dihydrogen phosphate ILs on the structure, morphology, luminescence intensity and lifetimes of the obtained Nd3+:LaPO4 was found. It is worth noting that the Nd3+ luminescence in LaPO4 has never been reported up to now.

• 出版日期2017-1