Effect of temperature and pumping power on the photoluminescence properties of type-II CdTe/CdSe core-shell QDs

被引：8
作者：
Saad, A. M. [1 ]
Bakr, M. M. [1 ]
Azzouz, I. M. [1 ]
Abou Kana, Maram T. H. [1 ]
机构：
[1] Cairo Univ, Natl Inst Laser Enhanced Sci, Giza 12613, Egypt
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 20期
关键词：
CdTe-CdSe core-shell; Near IR-spectrum; Photoluminescence; Quantum dots; Lifetime; QUANTUM DOTS; CORE/SHELL NANOCRYSTALS; STIMULATED-EMISSION; OPTICAL GAIN; HETEROSTRUCTURES; LUMINESCENCE; GROWTH; RATES;
D O I：
10.1016/j.apsusc.2011.05.040
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
CdTe/CdSe core-shell QDs type II was prepared by two steps synthetic process and embedded in polymer host. Emission in the NIR region was recorded. The effect of Ar laser excitation at different powers on the optical properties of the prepared QDs is studied at different temperatures (300-10 K). Amplified spontaneous emission is observed at room temperature and at 10 K. Also, lifetime measurement of prepared QDs was documented using N-2-laser. (C) 2011 Elsevier B.V. All rights reserved.
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页码：8634 / 8639
页数：6
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