BAND-EDGE ABSORPTION AND LUMINESCENCE OF NONSPHERICAL NANOMETER-SIZE CRYSTALS

被引：144

作者：

EFROS, AL ^{[1
]}

RODINA, AV ^{[1
]}

机构：

[1] STATE TECH UNIV,ST PETERSBURG 198052,RUSSIA

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.47.10005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of nonspherical shape on the optical properties of semiconductor microcrystals with a degenerate valence band has been theoretically studied. The asymmetry of microcrystals leads to a splitting of the fourfold-degenerate ground hole state into two twofold-degenerate ones. The value of this splitting is proportional to the deviation from sphericity and inversely proportional to the square of the microcrystal size, and is the function of the ratio of light- to heavy-hole effective masses (beta). This splitting could lead to the formation of long-lived electron-hole pairs in the prolate microcrystals of semiconductors with small beta and in the oblate ones with beta > 0.14.

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页码：10005 / 10007

页数：3

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