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The synthesis of luminescent nanoparticles from aqueous solutions

C. ONOSE1,* , C. S. ONOSE1, S. JINGA1, M. ELISA1, H. NICIU2, C. GRIGORESCU3, I. C. VASILIU2

Affiliation

  1. University POLITEHNICA Bucharest, Romania
  2. INS-Bucharest, Romania
  3. INOE 2000-Bucharest, Romania

Abstract

The paper is an experimental study on obtaining method of nanocrystalline ZnxCd1-xS from aqueous solution. The inorganic ternary compound is used as a pigment, phosphors and semiconductor material. We have investigated the dependence of ZnxCd1-xS nanoparticles size and properties on composition, pH and concentration of the starting solution. The method consists in co-precipitation of ZnxCd1-xS from CdSO4/ Cd(NO3)2 and ZnSO4/ Zn(NO3)2 solutions, by adding an exceeding amount of Na2S at high pH of the solution. The precipitation reaction takes place in the presence of a chemical stabilizer as styrene-maleic anhydride or acrylic acid-maleic anhydride co-polymers. The stabilizer provides a colloidal state of the synthesized material and does not allow ZnxCd1-xS nanoparticles to agglomerate. This ternary compound has a high conversion efficiency of the excitation energy into visible light, applied in photo and electroluminescent cells..

Keywords

Luminescent nanoparticles, Zn-Cd-S, Energy conversion, Electroluminescent cell.

Submitted at: Nov. 14, 2006
Accepted at: May 15, 2007

Citation

C. ONOSE, C. S. ONOSE, S. JINGA, M. ELISA, H. NICIU, C. GRIGORESCU, I. C. VASILIU, The synthesis of luminescent nanoparticles from aqueous solutions, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 5, pp. 1534-1539 (2007)