Radiative lifetime of multiexciton in CdSe/CdS core-shell quantum dot

被引：6
|
作者：
Salini, K. [1 ]
Rahul, K. Suseel [1 ,2 ]
Mathew, Vincent [1 ]
机构：
[1] Cent Univ Kerala, Dept Phys, Kasaragod 671314, Kerala, India
[2] Sri Vyasa NSS Coll, Wadakkanchery, India
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2016年 / 88卷
关键词：
Nanostructures; Semiconductors; Optical properties; Luminescence;
D O I：
10.1016/j.jpcs.2015.09.007
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The radiative lifetime of exciton, trions and biexciton in CdSe/CdS core-shell quantum dot has been calculated using effective mass approximation. The eigen-value and eigen-functions were obtained by solving Schroedinger and Poisson equations in a self-consistent iterative manner. The observed ratio of lifetimes of exciton and biexciton tau(X): tau(XX) is 2:1. The trions have a radiative lifetime similar to that of a monoexciton. Variation of radiative lifetimes with core radius and shell thickness was studied. Our investigations of Stark effect on this system point that only in the weak confinement region the external electric field has a control on the radiative lifetime. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：31 / 34
页数：4
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