Effect of size distribution of quantum dots with low doping concentration on photoluminescence emission spectrum

被引：0

作者：

Cheng C. ^{[1
]}

Li Z. ^{[1
]}

机构：

[1] Institute of Intelligent Optoelectronic Technology, Zhejiang University of Technology, Hangzhou, 310023, Zhejiang

来源：

Guangxue Xuebao/Acta Optica Sinica | 2016年 / 36卷 / 02期

关键词：

Effective mass model; Inhomogeneous broadening; Materials; Photoluminescence-spectral shape; Quantum dot; Size distribution;

D O I：

10.3788/AOS201636.0216001

中图分类号：

学科分类号：

摘要：

A general expression of the photoluminescence (PL)-spectral shape depending on the size distribution of quantum dots (QDs) in the condition of low doping concentration is presented, using the effective mass approximation and supposing a Gaussian distribution of QD sizes. Effect of the size fluctuation on the PL-broadened line is discussed. As an example, the PL-broadened lines of both IV-VI CdSe QDs and II-VI PbSe QDs are calculated. There is evidence to show that the calculated PL intensity, PL-peak wavelength and full width at half maximum of the PL-broadened line are in consistent with the experimental measurements. The size distribution of QDs has primary effect on the PL-broadened line. The PL-broadened line is an inhomogeneous broadening. © 2016, Chinese Laser Press. All right reserved.

引用

页数：7

共 20 条

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