Temperature Dependence Of Ca(Scn)2.2h2o:Eu2+ Emission.

Abstract

Temperature dependence of luminescence of alkaline earth metal thiocyanantes doped with Eu 2+ is measured in this work. In the early part of this research Ca(SCN) 2 ۰ 2H 2 O was doped with Eu 2+ and the emission measured at 80K. The emission of Ca(SCN) 2 ۰ 2H 2 O: Eu 2+ are influenced by many factors, such as the crystal field, polarity, second coordination sphere, temperature, etc all these factors influence the energy of the f-d states, that is why this study seek to focus on the effect of temperature. To investigate the temperature effect, the emission spectra were measured at different temperatures from 80K to 240K using Fluorolg-3 (FL3-22) spectrofluorometer from Jobin Yvon. The measured spectra showed that there is an inverse linear relation between temperature and intensity of the emission.

Cathodoluminescence of cerium dioxide: Combined effects of the electron beam energy and sample temperature

“…Alternatively the same bands at 2-2.5 eV were associated to 5d 1 → 4f 1 transitions of Ce 3+ ions in non-stoichiometric nano-crystalline ceria (nc-CeO2) by Maksimchuk et al [23]. Generally, PL bands at ∼2 eV are attributed to Ce 3+ luminescence, for example in the case of YAG: Ce 3+ [38] and ZrO2: Ce 3+ [39]. Finally, the bands at 3.1-3.15 eV were ascribed by Morshed et al to 4f → 2p charge transfer (CT) transitions for CeO2 films on a silicon substrate [21] and nc-CeO2 [23].…”