Optical investigations of blue shift in ZnS quantum dots

被引：32

作者：

Al-Douri, Y. ^{[1
,2
]}

Verma, K. D. ^{[3
]}

Prakash, Deo ^{[4
]}

机构：

[1] Univ Malaysia Perlis, Inst Nano Elect Engn, Kangar 01000, Perlis, Malaysia

[2] Univ Djillali Liabes Sidi Bel Abbes, Fac Sci, Dept Phys, Sidi Bel Abbes 22000, Algeria

[3] SV Coll, Dept Phys, Mat Sci Res Lab, Aligarh 202001, Uttar Pradesh, India

[4] SMVD Univ, Fac Engn, Sch Comp Sci & Engn, Katra 182320, J&K, India

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 88卷

关键词：

ZnS; Absorption coefficient; Quantum dots; REFRACTIVE-INDEX; AB-INITIO; PHOTOLUMINESCENCE; TEMPERATURE; DEPENDENCE; ALLOYS;

D O I：

10.1016/j.spmi.2015.10.029

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

ZnS quantum dots were synthesized using sulfur source of sodium sulphide and mercaptoethanol via chemical bath deposition technique. The synthesized ZnS QDs were analyzed and characterized by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and UV-visible (UV-vis) spectrophotometry. The average particle size goes down to 1.9 nm as capping agent concentration increases and corresponding absorption coefficient peak goes down to 265 nm. The blue shift within absorption-wavelength was elaborated. The refractive index and optical dielectric constant are calculated. A correlation between energy gap and absorption coefficient aside and particle size another side is discussed. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：662 / 667

页数：6

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