期刊
CHEMICAL PHYSICS LETTERS
卷 496, 期 4-6, 页码 227-235出版社
ELSEVIER
DOI: 10.1016/j.cplett.2010.07.059
关键词
-
资金
- Israel Science Foundation [1704/07, 962/06]
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001085]
We develop a generalized framework based on a Green's function formalism to calculate the efficiency of multiexciton generation in nanocrystal quantum dots. The direct/indirect absorption and coherent/incoherent impact ionization mechanisms, often used to describe multiexciton generation in nanocrystals, are reviewed and rederived from the unified theory as certain approximations. In addition, two new limits are described systematically - the weak Coulomb coupling limit and the semi-wide band limit. We show that the description of multiexciton generation in nanocrystals can be described as incoherent process and we discuss the scaling of multiexciton generation with respect to the photon energy and nanocrystal size. Illustrations are given for three prototype systems: CdSe, InAs and silicon quantum dots. (C) 2010 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据