Optical investigations of blue shift in ZnS quantum dots

被引：31
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
收藏
页码：662 / 667
页数：6
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