Vibronic Transitions and Site Substitution of Eu2+ and Codoped Ions in KMgF3:Eu-X (X=Ce, Cr, Gd, Cu) System

Abstract

Abstract: The higH_Resolution emission spectra of KMgF₃:Eu and KMgF₃:Eu-X(X=Ce, Cr, Gd, Cu) single crystals were measured at 300 and 77 K. The vibronic side bands of Eu²⁺ were characterized and an assignment of the normal mode frequencies to particular vibrations has been made. The correlation between the vibronic frequencies of Eu²⁺ and the site substitution of other co-doped ions was first found. The relationship between vibronic intensity of Eu²⁺ and other doped ions concentration showed that Cr³⁺, Gd³⁺ ions competed K⁺ sites with Eu²⁺ ions. Ce³⁺ and Eu³⁺ occurred the electron transference. The introduction of Cu⁺ made for Eu²⁺ substuting for K⁺ sites.

Key words: Vibronic spectrum, Emission spectrum, KMgF₃, Displacement site

CLC Number:

O616

TrendMD:

SU Hai-Quan, JIA Zhi-Hong, SHI Chun-Shan . Vibronic Transitions and Site Substitution of Eu^²⁺ and Codoped Ions in KMgF₃:Eu-X (X=Ce, Cr, Gd, Cu) System[J]. Chem. J. Chinese Universities, 2001, 22(10): 1620.

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Vibronic Transitions and Site Substitution of Eu^²⁺ and Codoped Ions in KMgF₃:Eu-X (X=Ce, Cr, Gd, Cu) System

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