CdF2-CaF2 superlattices on Si(111):: MBE growth, structural and luminescence studies

被引：9

作者：

Sokolov, NS ^{[1
]}

Gastev, SV ^{[1
]}

Khilko, AY ^{[1
]}

Kyutt, RN ^{[1
]}

Suturin, SM ^{[1
]}

Zamoryanskaya, MV ^{[1
]}

机构：

[1] Russian Acad Sci, AF Ioffe Physicotech Inst, Solid State Opt Dept, St Petersburg 194021, Russia

来源：

JOURNAL OF CRYSTAL GROWTH | 1999年 / 201卷

基金：

俄罗斯基础研究基金会;

关键词：

CdF2; CaF2; superlattices; X-ray diffraction; self-trapped excitons; luminescence of rare-earth ions;

D O I：

10.1016/S0022-0248(98)01515-2

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

New pseudomorphic superlattices (SLs) based on calcium and cadmium fluorides have been grown from molecular beams and structurally characterized by high-resolution X-ray diffractometry. It was found that positions of the CdF2 and CaF2 emission bands in the SLs with the shortest periods shifted to the blue and red parts of the optical spectra, respectively. It was revealed that the Eu2+ luminescence intensity under continuous optical excitation drastically decreases in a few seconds after the beginning of the excitation. This effect was accounted for by the photoionization of Eu2+ ions with charge transfer from their 4f(6)5d excited state to the neighbouring CdF2 layers. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：1053 / 1056

页数：4

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