The impact of lattice strain on optical properties of CdS nanocrystals

被引：13

作者：

Pote, Nilesh ^{[1
]}

Phadnis, Chinmay ^{[1
]}

Sonawane, Kiran ^{[1
]}

Sudarsan, V. ^{[2
]}

Mahamuni, Shailaja ^{[1
]}

机构：

[1] Univ Pune, Dept Phys, Pune 411007, Maharashtra, India

[2] Bhabha Atom Res Ctr, Div Chem, Bombay 400085, Maharashtra, India

来源：

SOLID STATE COMMUNICATIONS | 2014年 / 192卷

关键词：

Photoluminescence; Optical properties of nanocrystals; Structural properties of nanocrystals; II-VI semiconductors; SIZE; CLUSTERS; EMISSION;

D O I：

10.1016/j.ssc.2014.04.017

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

CdS nanocrystals (NCs) with size 4.3 rim, were coated with ZnS to form CdS/ZnS core shell in order to examine the effect of lattice strain due to lattice mismatch of 7%. Besides structural analysis, the optical absorption spectrum red shifts with increasing ZnS shell thickness affirming core shell nanostructure formation. Radiative life tune of CdS NCs remains invariant up to two monolayers of ZnS on CdS NCs and reduces to half the value at three monolayers onwards. The experimental finding is indicative of strain induced change in symmetry of hole wave-function in ground state. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：6 / 9

页数：4

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