Electronic structure of PbSe/PbS core-shell quantum dots

被引：65

作者：

Bartnik, A. C. ^{[1
]}

Wise, F. W.

Kigel, A.

Lifshitz, E.

机构：

[1] Cornell Univ, Dept Appl Phys, Ithaca, NY 14853 USA

[2] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.75.245424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

u The electronic structure of PbSe/PbS core-shell quantum dots (QDs) is calculated within a four-band envelope function formalism. The effective mass approximation used successfully to model PbS and PbSe core QDs is extended to include discontinuities in material parameters. The model shows that even though PbSe/PbS is a type-II heterostructure, for typical quantum dot sizes type-II properties will not be observed. Instead, the wave functions are predicted to extend throughout both materials. Experimental results confirm the unique properties of these nanostructures.

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页数：6

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