Quantization of multiparticle Auger rates in semiconductor quantum dots

被引：1337

作者：

Klimov, VI

Mikhailovsky, AA

McBranch, DW

Leatherdale, CA

Bawendi, MG

机构：

[1] Univ Calif Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

[3] MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA

来源：

SCIENCE | 2000年 / 287卷 / 5455期

关键词：

D O I：

10.1126/science.287.5455.1011

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We have resolved single-exponential relaxation dynamics of the 2-, 3-, and 4-electron-hole pair states in nearly monodisperse cadmium selenide quantum dots with radii ranging from 1 to 4 nanometers. Comparison of the discrete relaxation constants measured for different multiple-pair states indicates that the carrier decay rate is cubic in carrier concentration, which is characteristic of an Auger process. We observe that in the quantum-confined regime, the. Auger constant is strongly size-dependent and decreases with decreasing the quantum dot size as the radius cubed.

引用

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页码：1011 / 1013

页数：3

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