Synthesis and Characterizations of Bare CdS Nanocrystals Using Chemical Precipitation Method for Photoluminescence Application | Zendy

Hooi Ling Lee | Zendy; A. M. Issam | Zendy; M. Belmahi | Zendy; Badreddine Assouar | Zendy; H. Rinnert | Zendy; M. Alnot | Zendy

Open Access

Synthesis and Characterizations of Bare CdS Nanocrystals Using Chemical Precipitation Method for Photoluminescence Application

Author(s) -

Hooi Ling Lee,

A. M. Issam,

M. Belmahi,

Badreddine Assouar,

H. Rinnert,

M. Alnot

Publication year - 2009

Publication title -

journal of nanomaterials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.463

H-Index - 66

eISSN - 1687-4129

pISSN - 1687-4110

DOI - 10.1155/2009/914501

Subject(s) - materials science , photoluminescence , x ray photoelectron spectroscopy , raman spectroscopy , cadmium sulfide , nanocrystal , thiourea , precipitation , nanoparticle , thermal decomposition , cadmium chloride , phase (matter) , luminescence , analytical chemistry (journal) , chemical engineering , cadmium , nanotechnology , metallurgy , chemistry , physics , optoelectronics , meteorology , engineering , optics , organic chemistry , chromatography

Bare cadmium sulfide (CdS) nanocrystals were successfully synthesized by the thermolysis of a single-source organometallic precursor, cadmium chloride hemipentahydrate (CdCl2⋅2.5H2O) with thiourea in ethanol. The microstructure of the CdS samples was characterized using XRD, TEM, and Raman spectroscopy. The XRD's results showed that there was a transformation from cubic to hexagonal crystalline phase when higher mass of CdCl2⋅2.5H2O was used. Further experimental with different Cd2+ source showed ion Cl− originated from CdCl2⋅2.5H2O attributed to this crystalline phase transformation. The UV-Visible analysis indicated that quantum confinement effect took place when compared to the bulk CdS. However, the photoluminescence experiments revealed that the red-light emission was observed in all samples. This finding could be ascribed to deep trap defects that were due to sulfur vacancies as suggested by XPS and also the fact that the bare CdS nanoparticles are in contact with each other as shown in the TEM images

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