Absorption cross sections and Auger recombination lifetimes in inverted core-shell nanocrystals: Implications for lasing performance

被引：92

作者：

Nanda, J ^{[1
]}

Ivanov, SA ^{[1
]}

Htoon, H ^{[1
]}

Bezel, I ^{[1
]}

Piryatinski, A ^{[1
]}

Tretiak, S ^{[1
]}

Klimov, VI ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2006年 / 99卷 / 03期

关键词：

D O I：

10.1063/1.2168032

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study inverted core-shell nanocrystals (NCs), in which a core of a wide-gap semiconductor (ZnSe) is overcoated with a shell of a narrower gap material (CdSe). Depending on the core radius and the shell thickness, these NCs can exhibit either type-I or type-II behavior. We show that these heterostructures can be used to significantly increase the absorption cross sections and simultaneously decrease the efficiency of Auger recombination compared to monocomponent CdSe NCs emitting at the same wavelength. These properties enhance the lasing performance of inverted core-shell structures and allow, in particular, efficient amplified spontaneous emission in the range of blue colors. (c) 2006 American Institute of Physics.

引用

页数：7

共 39 条

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