Effect of annealing on structural and optical properties of ZnS nanocrystals

被引：0
|
作者：
Murali, G. [1 ]
Reddy, D. Amaranatha [1 ]
Poornaprakash, B. [1 ]
Vijayalakshmi, R. P. [1 ]
Rao, N. Madhusudhana [2 ]
机构：
[1] Sri Venkateswara Univ, Dept Phys, Tirupati 517502, Andhra Pradesh, India
[2] VIT Univ, Sch Adv Sci, Vellore 632014, Tamil Nadu, India
来源：
OPTOELECTRONICS AND ADVANCED MATERIALS-RAPID COMMUNICATIONS | 2011年 / 5卷 / 09期
关键词：
Nanocrystals; ZnS; Annealing; Redshift; PHOTOPHYSICAL PROPERTIES; QUANTUM; PHOTOLUMINESCENCE; NANOPARTICLES; LUMINESCENCE; GROWTH; SHAPE;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
ZnS nanocrystals (NCs) (similar to 2.66 nm) capped with 2-mercaptoethonal were synthesized from Na2S and Zinc acetate using a chemical co-precipitation method. Structural, morphological and optical properties of ZnS NCs annealed in air at temperatures up to 600 degrees C are presented. High temperature wurtzite phase of ZnS appeared at 400 degrees C and annealing up to 600 degrees C results in change of compound from ZnS to ZnO. Agglomeration of particles increased with increasing annealing temperature was observed from scanning electron microscopy (SEM) images. Decreasing of band gap with increasing annealing temperature was observed from diffuse reflectance studies (DRS) studies. Temperature dependent quenching and raising behavior of photoluminescence (PL) emissions accompanied by a red shift of PL peak from violet region to green region was observed.
引用
收藏
页码：928 / 931
页数：4
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