Open AccessMonodispersing Eu 3+ and Li + codoped CaF 2 nanoparticles for efficient luminescence
Author(s) -
Fan Ting,
Lü Jiantao,
Huang Yongfa,
Li Guoji
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0662
Subject(s) - luminescence , nanoparticle , ion , phosphor , materials science , photoluminescence , doping , crystal (programming language) , analytical chemistry (journal) , inorganic chemistry , nanotechnology , chemistry , optoelectronics , organic chemistry , computer science , programming language
Monodisperse oleic acid (OA) modified Eu 3+ and Li + codoped CaF 2 nanoparticles are presented in this work. The as‐obtained nanoparticles, with a hexagonal shape, can be well‐dispersed in organic apolar solvents. The incorporation of Li + ions in CaF 2 :Eu 3+ does not lead to new crystalline phases. The main diffraction peaks are found to shift to small angles when codoped with 7 mol% Li + , while a reverse shift can be noted with the codoping amount increasing to 9 mol% Li + , indicating that the codoped Li + enables the crystal field environment of Eu 3+ to be changed. The excitation and luminescence intensities of all peaks indexed to Eu 3+ have enhanced apparently when codoped with 7 mol% Li + ions. The lifetime of the 5 D 0 state of Eu 3+ ions is also increased by introducing 7 mol% of Li + ions.