Soft X-ray spectroscopy of single sized CdS nanocrystals:: size confinement and electronic structure

被引：43

作者：

Lüning, J

Rockenberger, J

Eisebitt, S

Rubensson, JE

Karl, A

Kornowski, A

Weller, H

Eberhardt, W

机构：

[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[2] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

SOLID STATE COMMUNICATIONS | 1999年 / 112卷 / 01期

关键词：

nanostructures; semiconductors; chemical synthesis; EXAFS; NEXAFS; SEXAFS; electronic band structure;

D O I：

10.1016/S0038-1098(99)00306-3

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Soft X-ray spectroscopy of CdS nanocrystals within their crystalline superlattice allows to relate unambiguously changes of the electronic structure with the particle size and shape which is known from single crystal X-ray diffraction. We find that the valence and conduction band edge shift contribute to the same extent to the total band gap opening of about 2 eV with respect to CdS bulk as the particle size decreases to 10 Angstrom. Taking a finite height of the potential walls into account, we can reproduce these results within an effective mass approximation model. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：5 / 9

页数：5

共 24 条

[1] Perspectives on the physical chemistry of semiconductor nanocrystals [J].