Synthesis and optical properties of CdS/ZnS coreshell nanoparticles

被引：40

作者：

Amma, B. Saraswathi ^{[1
]}

Manzoor, K. ^{[2
]}

Ramakrishna, K. ^{[1
]}

Pattabi, Manjunatha ^{[1
]}

机构：

[1] Mangalore Univ, Dept Mat Sci, Mangalagangothri 574199, Karnataka, India

[2] Amritha Inst Med Sci, Cochin, Kerala, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 112卷 / 03期

关键词：

Chalcogenides; Chemical synthesis; Optical properties; Luminescence;

D O I：

10.1016/j.matchemphys.2008.06.043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Synthesis and optical properties of manganese (Mn2+)-doped, polyvinyl pyrrolidone (PVP)-capped cadmium sulphide (CdS) nanoparticles coated with zinc sulphide (ZnS) are reported. Colloidal solution of Mn2+-doped CdS nanoparticles capped with PVP is synthesized using methanol as solvent. PVP is used to control the particle size and to prevent agglomeration. Mn2+ doping is expected to help in increasing the CdS band edge photoluminescence (PL) emission. Addition of zinc nitrate and sodium sulphide alternately to the Mn2+-doped, PVP-stabilized CdS colloid led to the formation of ZnS-coated CdS coreshell nanoparticles. Photoluminescence emission spectra recorded for(CdS-PVP)Mn nanoparticles showed two emission peaks, one at 416 nm and the other weaker peak at 586 nm which is attributed to Mn2+ emission. Intensity of Mn2+ peak increased with increase in the Mn2+ content. Mn2+ emission disappears when ZnS is coated over the CdS core, resulting in pure CdS band edge emission. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：789 / 792

页数：4

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