%0 Journal Article %T A Novel Thermochemical Method for Fabrication and Theoretical Explanation of High Luminescent Mn-Doped CdS Nanoparticles %A Mostafa Darvishi %A Alireza Nikfarjam %J Journal of Materials Science and Chemical Engineering %P 1-20 %@ 2327-6053 %D 2018 %I Scientific Research Publishing %R 10.4236/msce.2018.63001 %X In this paper, fabrication and characterization of bare and doped CdS nanoparticles as well as investigating the luminescence properties of these particles as an important II-VI semiconductor are presented. A novel Thermochemical method was used for synthesis of these quantum dots. Thiols were used as the capping agent to prevent further growth during fabrication process. The application of TGA as a capping agent instead of TG was studied as a novel idea in this paper and was used practically in the synthesis of semiconductor nanoparticles. Using this process resulted in particles with sizes between 3 - 7 nm. Several samples were synthesized and characterized under various Mn ions doping ratio from 1:10 to 1:180, different temperatures from 40¡æ to 96¡æ and different pH values from 6 to 10. Synthesis of CdS nanoparticles with high Mn ions concentration resulted in luminescence decrement, while luminescence of nanoparticles was increased by decreasing Mn/Cd doping ratio until Mn:Cd = 1:180. The best fabrication temperature was obtained at 96¡æ and the highest luminescence was observed at the pH value of 9. A theoretical explanation for the behavior of fabricated high luminescent quantum dots is presented based on the principles of quantum mechanics. %K Mn:CdS Nanoparticle %K Quantom Dot %K Thermochemical Growth %K Photoluminescence %K UV-Vis Spectroscopy %U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=83097