Luminiscences procesi ar erbiju aktivētā bārija lutēcija fluorīdā un to atkarība no temperatūras un erbija jonu koncentrācijas
Loading...
Date
Authors
Advisor
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Language
lav
Abstract
Šajā darbā tiek apskatītas Ba4Lu3F17:Er3+ spektroskopiskās īpašības un to atkarības no temperatūras (8-300K) un aktivatoru jonu, Er3+, koncentrācijas (1, 10 un 40 mol%). Sintezētajiem pulverveida paraugiem tika izmērīti luminiscences un augšup-pārveidotās luminiscences spektri dažādās temperatūrās, ierosinot ar starojumu redzamajā un infrasarkanajā spektra diapazonā. Vietas jūtīgā spektroskopija ļauj noteikt, ka Er3+ atrodas dažādās pozīcijās Ba4Lu3F17 kristāliskajā struktūrā. Mainoties parauga temperatūrai, tiek novērotas izmaiņas luminiscences joslu platumā un intensitātē. Zaļajai Er3+ luminiscences joslai tiek uzņemtas luminiscences dzišanas kinētikas un to atkarība no parauga temperatūras. Balstoties uz iegūtajiem eksperimentālajiem datiem, darbā tiks spriests par luminiscences procesiem Ba4Lu3F17:Er3+ un kā tos ietekmē materiāla temperatūra un Er3+ koncentrācija.
In this work the spectroscopic properties of Ba4Lu3F17:Er3+, their dependence from temperature (8-300 K) and activator ion Er3+ concentration (1, 10 and 40 mol%) were measured. Luminescence and up-conversion luminescence spectra of powder samples excited in visible and infrared spectral region were measured in various temperatures. Site sensitive spectroscopy reveals different Er3+ positions in crystalline structure. Temperature dependence of phonon induced luminescence bands broadening and changes in intensity were observed. Luminescence decay kinetics of the green Er3+ spectral band and its dependence from temperature were measured. Based on acquired experimental data, the impact of Er3+ concentration and temperature on the luminescence process in the Ba4Lu3F17:Er3+ will be discussed in this work.
In this work the spectroscopic properties of Ba4Lu3F17:Er3+, their dependence from temperature (8-300 K) and activator ion Er3+ concentration (1, 10 and 40 mol%) were measured. Luminescence and up-conversion luminescence spectra of powder samples excited in visible and infrared spectral region were measured in various temperatures. Site sensitive spectroscopy reveals different Er3+ positions in crystalline structure. Temperature dependence of phonon induced luminescence bands broadening and changes in intensity were observed. Luminescence decay kinetics of the green Er3+ spectral band and its dependence from temperature were measured. Based on acquired experimental data, the impact of Er3+ concentration and temperature on the luminescence process in the Ba4Lu3F17:Er3+ will be discussed in this work.