مطالعه خواص اپتيكي نانو ذره هاي CdS و ZnS:Fe +2 ، ZnS:Mn +2، ZnS

The Study Of Optical Properties Of ZnS , ZnS:Mn+2, ZnS:Fe+2 and CdS

در اين پژوهش ، نانو ذره هاي نيمرساناي ZnS ، ZnS:Mn +2 و ZnS:Fe +2 و CdS با روش مهار شيميايي سنتز شد . نتيجه طيف سنجي UV-Vis ، XRF و XRDنشان داد كه اندازه ذره هاي ZnS تهيه شده در حدود CdS و 2-1 nm در حدود3-2 nm وگاف نواري انرژي آنها بيشتر از گاف انرژي حالت حجيم ( براي ZnS ، 6 eV ر 3 و براي CdS ، 4 eV ر 2 است . ضمنا اثر آلاينده هاي مننز و آهن را برروي اندازه گاف انرژي ZnS بررسي كرديم.

In this research, we have synthesized nano structuered ZnS , ZnS:Mn+2 , ZnS:Fe+2 and CdS semiconductors . We have used the Chemical Capping Method for synthesis. The samples were charactrazied by UV-Vis, XRD and XRF Techniques. It was shown that the sizes of ZnS and CdS particles are 1-2 nm and 2-3 nm , respectively . We have found that the band gap energy of these nanoparticles is greater than their bulk state( for ZnS and CdS 3.6 , 2.4 eV , respectively ).Also we observed the effects of Mn+2 and Fe+2 doppants on band gap energy