Title :
Charge transfer and europium trapped exciton states in Eu3+/Eu2+ doped phosphors
Author :
Baran, Anastasia ; Mahlik, S. ; Grinberg, M. ; Barzowska, J. ; Szczodrowski, K. ; Sun Il Kim ; Hyo Jin Seo
Author_Institution :
Inst. of Exp. Phys., Univ. of Gdansk, Gdansk, Poland
Abstract :
Effects of temperature on the luminescence of LiMgPO4 and β-Ca2SiO4 doped with Eu3+ and Eu2+ is presented. The short distance compensation of the Eu3+ in the Ca2+ sites in β-Ca2SiO4:Eu2+/Eu3+ and the long distance compensation of Eu3+ in the Mg2+ or other sites in LiMgPO4:Eu2+/Eu3+ is responsible for different temperature behaviour of the luminescence in both materials. The importance of the energy of the Fermi level is also discusses.
Keywords :
Fermi level; calcium compounds; charge exchange; europium; excitons; lithium compounds; magnesium compounds; phosphors; photoluminescence; Ca2SiO4:Eu; Fermi level; LiMgPO4:Eu; charge transfer; doped phosphors; europium trapped exciton states; luminescence; Length measurement; β-Ca2SiO4:Eu3+; Eu2+; Eu3+ phosphors; Fermi level; LiMgPO4:Eu2+; compensation mechanism; luminescence;
Conference_Titel :
Oxide Materials for Electronic Engineering (OMEE), 2014 IEEE International Conference on
Conference_Location :
Lviv
Print_ISBN :
978-1-4799-5960-0
DOI :
10.1109/OMEE.2014.6912370
