Open AccessАнтистоксова люминесценция нанокристаллов Gd-=SUB=-2-=/SUB=-O-=SUB=-3-=/SUB=-, легированных ионами Er-=SUP=-3+-=/SUP=- и Yb-=SUP=-3+-=/SUP=-
Author(s) -
В. А. Пустоваров,
Е. С. Трофимова,
Ю.А. Кузнецова,
A. F. Zatsepin
Publication year - 2018
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2018.14.46343.17315
Subject(s) - nanocrystalline material , luminescence , ion , phosphor , materials science , photon upconversion , analytical chemistry (journal) , crystal structure , gadolinium , dopant , doping , nanocrystal , crystallography , chemistry , nanotechnology , optoelectronics , organic chemistry , chromatography , metallurgy
The upconversion luminescence (UCL) of nanocrystalline gadolinium oxide (Gd_2O_3) doped with Er^3+ and Yb^3+ ions has been studied in the temperature range of 90–400 K. The nanocrystals were synthesized by chemical vapor deposition and possessed a cubic crystalline structure with an average particle size within 48–57 nm. It is established that the USL intensity in the red (^4 F _9/2 → ^4 I _15/2 transition in Er3+ ion) and green (^4 S _3/2 → ^4 I _15/2 transition) spectral regions depends on the sample temperature and concentration of dopant ions, as well as on the additional structural defects (anion vacancies) created in the crystal lattice by the introduction of Zn^2+ ions or irradiation with high-energy (10 MeV) electrons. The luminescence efficiency and spectrum of the upconversion phosphor are determined by energy transfer processes.