Introduction
Upconversion, Downconversion luminescence and magnetization properties of Yb3+, Ho3+ codoped BaGdF5 samples  with different morphologies (nanoparticles, peanut-like and capsule-like submicrocrystals) and sizes (37–900 nm) are studied. The crystal structure of BaGdF5 solid-solution is firstly established via the materials studio software and retrieved refinement of the powder XRD data.
The detailed crystal structure of Lu6O5F8 as a new matrix is firstly analysed via retrieved refinement of XRD. The corresponding Powder Diffraction File card information was also obtained through indexing the XRD pattern of the host. Upconversion under excitation at 980 nm, downconversion with Xe lamp as excitation source and cathodoluminescence properties of Lu6O5F8:20%Yb3+,1%Er3+(Tm3+),x%Li+ (0≤x≤12) nanoparticles were compared and studied
The white upconversion light may be a possible candidate for applications in the field of lighting, displays, and photonics. The investigation deals with the dependence of white UC light on the synthetic conditions is innovative.

BaGdF5

The crystal structure of BaGdF5 solid-solution with Gd3+ ions replacing only one kind of Ba2+ site, and the projection of only one cationic layer of the BaGdF5 (Gd3+ ions substitute Ba2+ ions with the same possibility).


XRD patterns and morphologies of the as-prepared BaGdF5 products using different additives

Schematic illustration of the growth process of the unique BaGdF5:Yb3+ , Ho3+nano/submicroarchitectures using different additives.

Upconversion, Downconversion luminescence and magnetization properties of  Yb3+, Ho3+ codoped BaGdF5 samples  with different morphologies
Lu6O5F8
 
The Rietveld fitting results for the XRD diffraction patterns and crystal structure  of the Lu6O5F8 nanoparticles: SEM images (left) and size distributions (right) of Lu6O5F8:20%Yb3+,1%Er3+ nanoparticles with different Li+ doping concentrations from 0 to 12%.

Luminescence spectra of Lu6O5F8:20%Yb3+,1%Er3+,x%Li+ (0  ≤x≤12) nanoparticles (a) UC; (b) DC; (c) CL; (d) the CIE chromaticity diagram for samples under different excitation sources 

A scheme showing the CL (a) and PL  (b) of (i) DC and (ii) UC processes in Lu6O5F8:20%Yb3+,1%Er3+,x%Li+ (0≤ x ≤ 12) nanoparticles.