Ni +7 Ion Beam Effect on Ag Doped ZnS Nanocrystals Embedded in PMMA Matrix
AIP Conference Proceedings(2011)
摘要
Semiconductor nanocrystals (NCs) have received much interest for their optical and electronic properties. When these NCs dispersed in polymer matrix, brightness of the light emission is enhanced due to their quantum dot size. Silver doped Zinc Sulphide NCs were synthesized through chemical route method. The synthesized NCs are characterized by XRD. The effect of Ag doping and Swift heavy ion irradiation on optical properties of nanocomposite polymer films is analyzed by Photoluminescence (PL) and UV measurements. The XRD results show that Ag doped ZnS was grown in the hexagonal phase of about 10nm size as calculated by Scherer formula. These NCs were dispersed in PMMA matrix by solution cast method and irradiated by swift heavy ion (SHI) (Ni+7 ion beam, 100MeV). The UV-Vis measurement show a red shift in optical absorption and band gap decreases after irradiation with respect to pristine nanocomposite polymer film. Photoluminescence shows the enhancement in luminescence intensity after irradiation.
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关键词
Nanocrystals,XRD,UV,Photoluminescence
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