Synthesis and optical properties of Mn2+-doped ZnS nanoparticles in solutions and coatings

被引：20

作者：

Sohling, U ^{[1
]}

Jung, G ^{[1
]}

Saenger, DU ^{[1
]}

Lu, S ^{[1
]}

Kutsch, B ^{[1
]}

Mennig, M ^{[1
]}

机构：

[1] Inst Neue Mat, D-66123 Saarbrucken, Germany

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 1998年 / 13卷 / 1-3期

关键词：

zinc sulfide; nanoparticles; absorption spectroscopy; luminescence spectroscopy; coatings;

D O I：

10.1023/A:1008688821287

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mn2+-doped ZnS nanoparticles with different Mn-doping concentrations stabilized by hydroxypropyl cellulose (HPC) have been synthesized in ethanolic solutions and coatings. Their optical and structural properties have been characterized by means of UV-vis spectroscopy, luminescence spectroscopy, high resolution transmission electron microscopy (HRTEM) and small angle X-ray scattering (SAXS). Solutions and coatings exhibit a strong luminescence at 590 nm when excited with UV light showing that Mn2+ is incorporated into the ZnS nanoparticles. The highest luminescence intensity is obtained with an Mn2+ concentration of 2 mol%. HRTEM and SAXS investigations show that the particles are crystalline and are 3 +/- 0.5 nm in size. Irradiation of the coatings with UV light leads to a photochemical oxidation of the particles, as shown by the decreasing absorption of the coating with irradiation time and a blue shift of the absorption maximum. Furthermore, the luminescence intensity first strongly increases and then decreases completely with UV-irradiation time. Both phenomena can be explained by the photochemical oxidation of the particles.

引用

页码：685 / 689

页数：5

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