EPR and ENDOR investigations on CdS:Mn nanocrystals

被引：29

作者：

Hofmann, DM

Hofstaetter, A

Leib, U

Meyer, BK ^{[1
]}

Counio, G

机构：

[1] Univ Giessen, Inst Phys, D-35392 Giessen, Germany

[2] Ecole Polytech, Phys Mat Condensee Lab, CNRS, URA 1254 D, F-91128 Palaiseau, France

来源：

JOURNAL OF CRYSTAL GROWTH | 1998年 / 184卷

关键词：

D O I：

10.1016/S0022-0248(98)80081-X

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Mn2+-doped CdS nanocrystals capped by different organic materials show a bright luminescence with a quantum yield of up to 60%. In EPR, beside the usual 6 line hyperfine pattern of manganese, rather intense forbidden transitions and an underlying structureless resonance line are observed. ENDOR measurements on several parts of the EPR spectra revealed the existence of a quadrupole interaction of the Mn2+ which probably is due to surface charges. In addition, resonances due to the nuclei of the capping material are observed, to some extent due to the distant ENDOR mechanism, to another due to dipolar interaction with Mn ions. Since the ratio of these two contributions varies between the broad and the sharp spectrum, conclusions with respect to the distribution of the manganese ions inside the nanoparticles can be drawn. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：383 / 387

页数：5