Site Substitution and Energy Transfer of Eu2+ and Ce3+ in KMgF3:Eu and KMgF3:Eu-Ce Single Crystals

Abstract

Abstract: The high-resolution emission spectra of KMgF₃:Eu and KMgF₃:Eu-Ce single crystals were measured at 77 K. The site substitution of Eu ²⁺ and Eu ²⁺-Ce ³⁺ co-doped system in KMgF₃ was discussed. Eu ²⁺ substituted for K⁺ sites on three different_site symmetry: cubic, trigonal and tetragonal. The attribution of all lines occuring in the emission spectra were ascertained.The indirect energy transfer from ⁶P_5/2 states of Eu ²⁺ to 4f 5d states of Ce ³⁺ in KMgF₃:Eu-Ce was observed and the energy transfer mechanism was studied. The d-d interaction among levels was proposed.

Key words: KMgF₃, Energy transfer, Site substitution

CLC Number:

O616

TrendMD:

SU Hai-Quan, JIA Zhi-Hong, SHI Chun-Shan . Site Substitution and Energy Transfer of Eu²⁺ and Ce³⁺ in KMgF₃:Eu and KMgF₃:Eu-Ce Single Crystals[J]. Chem. J. Chinese Universities, 2001, 22(7): 1081.

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Site Substitution and Energy Transfer of Eu²⁺ and Ce³⁺ in KMgF₃:Eu and KMgF₃:Eu-Ce Single Crystals

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