Optical and structural properties of ensembles of colloidal Ag2S quantum dots in gelatin

被引：39

作者：

Ovchinnikov, O. V. ^{[1
]}

Smirnov, M. S. ^{[1
]}

Shapiro, B. I. ^{[2
]}

Shatskikh, T. S. ^{[1
]}

Perepelitsa, A. S. ^{[1
]}

Korolev, N. V. ^{[1
]}

机构：

[1] Voronezh State Univ, Voronezh 394006, Russia

[2] Moscow State Univ Fine Chem Technol, Moscow 119571, Russia

来源：

SEMICONDUCTORS | 2015年 / 49卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

SILVER; NANOPARTICLES; FILMS; NANOCRYSTALS; GROWTH;

D O I：

10.1134/S1063782615030173

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The size dependences of the absorption and luminescence spectra of ensembles of hydrophilic colloidal Ag2S quantum dots produced by the sol-gel method and dispersed in gelatin are analyzed. By X-ray diffraction analysis and transmission electron microscopy, the formation of core/shell nanoparticles is detected. The characteristic feature of the nanoparticles is the formation of crystalline cores, 1.5-2.0 nm in dimensions, and shells of gelatin and its complexes with the components of synthesis. The observed slight size dependence of the position of infrared photoluminescence bands (in the range 1000-1400 nm) in the ensembles of hydrophilic colloidal Ag2S quantum dots is explained within the context of the model of the radiative recombination of electrons localized at structural and impurity defects with free holes.

引用

页码：373 / 379

页数：7

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