Open AccessColor change upconversion mechanism of Y-=SUB=-6-=/SUB=-O-=SUB=-5-=/SUB=-F-=SUB=-8-=/SUB=-:Er-=SUB=-3+-=/SUB=-/Yb-=SUP=-3+-=/SUP=- microtubes by using time-resolve spectra -=SUP=-*-=/SUP=-
Author(s) -
S. Wang,
Xu Cheng,
J.Y. Wang,
Zhicheng Zhong
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.07.46125.294
Subject(s) - photon upconversion , energy transfer , spectral line , analytical chemistry (journal) , quenching (fluorescence) , materials science , emission spectrum , luminescence , ion , optoelectronics , atomic physics , chemistry , fluorescence , optics , physics , chromatography , astronomy , organic chemistry
The mechanism of the upconversion processes in Y_6O_5F_8: 2%Er^3+/ X %Yb^3+ ( X = 3, 10, 20) microtubes has been explored. The luminescent properties of the as prepared sample is investigated by utilizing up- /downconversion, decay and time resolve spectra. The results indicate that the red and green emission are clearly competitive depending on the Yb^3+ concentration. High Yb^3+ concentration induces the enhancement of the energy-back-transfer (EBT), process, which leads to the quenching of green emission and enhances the red emission. So it is possible to utilize the temporal evolutions of emission bands to deeply understand the color change UC mechanisms.