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New observations on the pressure dependence of luminescence from Eu2+-doped MF2 (M = Ca, Sr, Ba) fluorides
Su FH; Chen W; Ding, K; Li GH; Chen, W, Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA. 电子邮箱地址: weichen@uta.edu; ghli@red.semi.ac.cn
2008
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY A
ISSN1089-5639
Volume112Issue:21Pages:4772-4777
AbstractThe luminescence from Eu2+ ions in MF2 (M = Ca, Sr, Ba) fluorides has been investigated under the pressure range of 0-8 GPa. The emission band originating from the 4f(6)5d(1) -> 4f(7) transition of Eu2+ ions in CaF2 and SrF2 shows the red-shift as increasing pressure with pressure coefficients of -17 meV/GPa for CaF2 and -18 meV/GPa for SrF2. At atmospheric pressure, the emission spectrum of BaF2:Eu2+ comprises two peaks at 2.20 and 2.75 eV from the impurity trapped exciton (ITE) and the self-trapped exciton (STE), respectively. As the pressure is increased, both emission peaks shift to higher energies, and the shifting rate is slowed by the phase transition from the cubic to orthorhombic phase at 4 GPa. Due to the phase transition at 4-5 GPa pressure, the ITE emission disappears gradually, and the STE emission is gradually replaced by the 4f(6)5d(1) -> 4f(7) transition of Eu2+. Above 5 GPa, the pressure behavior of the 4f(6)5d(1) -> 4f(7) transition of EU2+ in BaF2: EU2+ is the same as the normal emission of Eu2+ in CaF2 and SrF2 phosphors.
metadata_83[chen, wei] univ texas arlington, dept phys, arlington, tx 76019 usa; [su, fu hai; ding, kun; li, guo hua] chinese acad sci, inst semicond, state key lab superlattices & microstruct, beijing 100083, peoples r china
KeywordX-ray-diffraction
Subject Area半导体化学
Indexed BySCI
Language英语
Date Available2010-03-08
Document Type期刊论文
Identifierhttp://ir.semi.ac.cn/handle/172111/6670
Collection中国科学院半导体研究所(2009年前)
Corresponding AuthorChen, W, Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA. 电子邮箱地址: weichen@uta.edu; ghli@red.semi.ac.cn
Recommended Citation
GB/T 7714
Su FH,Chen W,Ding, K,et al. New observations on the pressure dependence of luminescence from Eu2+-doped MF2 (M = Ca, Sr, Ba) fluorides[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2008,112(21):4772-4777.
APA Su FH,Chen W,Ding, K,Li GH,Chen, W, Univ Texas Arlington, Dept Phys, POB 19059, Arlington, TX 76019 USA. 电子邮箱地址: weichen@uta.edu,&ghli@red.semi.ac.cn.(2008).New observations on the pressure dependence of luminescence from Eu2+-doped MF2 (M = Ca, Sr, Ba) fluorides.JOURNAL OF PHYSICAL CHEMISTRY A,112(21),4772-4777.
MLA Su FH,et al."New observations on the pressure dependence of luminescence from Eu2+-doped MF2 (M = Ca, Sr, Ba) fluorides".JOURNAL OF PHYSICAL CHEMISTRY A 112.21(2008):4772-4777.
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