Photoluminescence properties of PbSe/PbS core-shell quantum dots

被引：1
作者：
Maikov, Georgy I. [1 ]
Vaxenburg, Roman [1 ]
Yanover, Diana [1 ]
Kigel, Ariel [1 ]
Sashchiuk, Aldona [1 ]
Lifshitz, Efrat [1 ]
机构：
[1] Technion Israel Inst Technol, Schulich Fac Chem, Russell Berrie Nanotechnol Inst, IL-32000 Haifa, Israel
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 12 | 2009年 / 6卷 / 12期
关键词：
NANOCRYSTALS;
D O I：
10.1002/pssc.200982565
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The present study describes the investigation of the ground-state exciton emission in the PbSe/PbS core-shell colloidal quantum dots (CQDs) with different core-radius/shell-thickness ratio, by recording temperature dependence of ground-state exciton photoluminescence (PL) properties, including line-width, integrated PL intensity, and the temperature coefficient of energy band-gap, over a temperature range from 1.4 K to 300 K. The obtained data reveal a reduction of the temperature coefficient of the energy band-gap as well as slightly decrease of exciton and optical phonon coupling in the PbSe/PbS core-shell CQDs with respect to that in the corresponding PbSe core. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：2716 / 2718
页数：3
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