Type

Journal Article

Authors

Michael A. Morris
Justin D. Holmes
Patrick B. Carolan
Tandra Ghoshal
Atul V. Thorat

Subjects

Physics

Topics
nanoparticles defects surface defects luminescence eels ceria europium doping electron energy loss spectroscopy ions doping additives

Defect chemistry and vacancy concentration of luminescent europium doped ceria nanoparticles by solvothermal method (2014)

Abstract Pure phase and europium-doped ceria nanocrystals have been synthesized by a single step simple solvothermal process. Different spectroscopic, diffractive, and microscopic techniques were used to determine the morphology, size, crystal structure, and phase of all the samples. Electron energy loss spectroscopy (EELS) for elemental mapping confirmed that good solid solutions were formed and that the particles had a homogeneous distribution of europium. The defect chemistry was more complex than might be expected with the incorporation of each Eu3+ ion resulting in the production of an anion vacancy since the doping results in charge compensating (i.e., for Eu3+) anion vacancies as well as vacancies due to oxygen removal from the crystallite surface. Variations in nanoparticles dimension and lattice parameters were measured as a function of dopant concentrations and their variations explained. The band gap of the samples could be tailored by the doping. The doped samples were found to be luminescent due to the substitution of Ce4+ ions in the cubic symmetric lattice by the dopant ions. The thermal stability of the fluorescence properties was also investigated.
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Full list of authors on original publication

Michael A. Morris, Justin D. Holmes, Patrick B. Carolan, Tandra Ghoshal, Atul V. Thorat

Experts in our system

1
Michael A. Morris
University College Cork
Total Publications: 164
 
2
Justin D. Holmes
University College Cork
Total Publications: 287
 
3
Patrick B. Carolan
University College Cork
Total Publications: 5
 
4
Tandra Ghoshal
University College Cork
Total Publications: 32
 
5
Atul V. Thorat
University College Cork
Total Publications: 3