Influence of the embedding matrix on optical properties of Ge nanocrystals-based nanocomposite

被引：10

作者：

Parola, S. ^{[1
]}

Quesnel, E. ^{[1
]}

Muffato, V. ^{[1
]}

Bartringer, J. ^{[2
]}

Slaoui, A. ^{[2
]}

机构：

[1] CEA G DRT LITEN DTNM, F-38054 Grenoble 9, France

[2] InESS CNRS UMR 7163, F-67037 Strasbourg 2, France

来源：

JOURNAL OF APPLIED PHYSICS | 2013年 / 113卷 / 05期

关键词：

SILICON QUANTUM DOTS; GERMANIUM NANOCRYSTALS; PHOTOLUMINESCENCE; FILMS; CONFINEMENT; EXCITONS; AL2O3; CELLS;

D O I：

10.1063/1.4789959

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Germanium nanocrystals were prepared by a nanocluster source and characterized by photoluminescence and spectroscopic photometry methods. The optical measurements were carried out in order to estimate the effective bandgap of the Ge nanocrystals. Both Mie theory and the quantum confinement theory were applied to interpret the extracted absorption data. We found that the quantum confinement theory enables to explain the nanocrystal size and the host matrix dependence of the nanocrystal bandgap. On the other hand, the photoluminescence measurements have not allowed to confirm the bandgap evaluated from absorption data. This is explained as due to the dominant effect of the recombination at the nanocrystals surface. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4789959]

引用

页数：8

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