title: Local Environment Study of Eu3+ Doped KGd2F7 by Site-Selective Spectroscopy.
abstract: The site-selective spectra and decay curves at 20 K of Eu3+ ions doped KGd2F7 were measured to study the local environment of the Eu3+ sites. The experimental results show that Eu3+ ions occupy three types of sites in the KGd2F7 host. And Eu3+ ions in different types of sites exhibit quite distinct emission spectra and have remarkably different 5D0 level decay lifetimes. Based on the intensity ratio of 5D0--> 7F2,1 transitions of Eu3+ and the 5D0 decay lifetimes in different types of sites, the correlation between the luminescent properties and the site symmetry is discussed.
authors.forename: Yanguang
authors.initials: Y
authors.lastname: Qin
authors.forename: Xiantao
authors.initials: X
authors.lastname: Wei
authors.forename: Jun
authors.initials: J
authors.lastname: Wen
authors.forename: Yonghu
authors.initials: Y
authors.lastname: Chen
authors.forename: Min
authors.initials: M
authors.lastname: Yin