Synthesis and characterisation of CdSe QDs by using a chemical solution route

Micro & nano letters

article

Mahfuza Akter¹  Mohammed Nazrul Islam Khan²  Hayati Mamur³  Mohammad Ruhul Amin Bhuiyan¹ 

[1]Department of Electrical and Electronic Engineering, Islamic University

[2]Materials Science Division, Atomic Energy Center

[3]Department of Electrical and Electronics Engineering, Manisa Celal Bayar University

关键词: semiconductor growth;    X-ray diffraction;    scanning electron microscopy;    visible spectra;    ultraviolet spectra;    X-ray chemical analysis;    cadmium compounds;    II-VI semiconductors;    semiconductor quantum dots;    energy gap;    wide band gap semiconductors;    surface morphology;    transmission electron microscopy;    optical constants;    chemical solution route;    efficient synthesis process approach;    cadmium selenide quantum dots;    optoelectronic device manufacturing;    cadmium chloride;    2-mercaptoethanol;    sodium selenide;    characterisation parameters;    X-ray diffraction;    transmission electron microscopy;    UV-visible spectra;    bulk CdSe bandgap;    dissolving;    ultraviolet absorbance;    XRD;    scanning electron microscopy;    energy dispersive X-ray analysis;    TEM;    cubic crystal structure;    crystalline dimensions;    surface morphology;    agglomerated spheres;    CdSe;   

DOI  :  10.1049/mnl.2019.0200

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

An efficient synthesis process approach based on a chemical solution route is developed for the cadmium selenide quantum dots (CdSe QDs) that utilise photonic and optoelectronic device manufacturing. The developed route consists of dissolving the cadmium chloride (CdCl 2 . H 2 O), 2-mercaptoethanol and sodium selenide anhydrous (Na 2 SeO 3 ). The different characterisation parameters such as ultraviolet (UV) absorbance, x-ray diffraction (XRD), scanning electron microscopy, energy dispersive x-ray and transmission electron microscopy (TEM) were employed in order to develop the CdSe QDs. When the sample was analysed from the UV–visible studies, the bandgap was about 2.16 eV, whereas the bulk CdSe bandgap was about 1.78 eV. The developed CdSe QDs possessed a cubic crystal structure with crystalline dimensions of about 4.86 nm. Its surface morphology and structure showed the smooth appearance of the surface. The result indicated agglomerated spheres. Ultimately, according to XRD and TEM results, the crystalline dimension was determined in good agreements.

【 授权许可】

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