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- W2071002922 abstract "3 d transition-metallic ions doped ZnS quantum dots (Q-dots) were synthesized by the facile wet-chemical process. During synthesis, various ions, i.e. manganese (Mn2+), cobalt (Co2+) and silver (Ag+), were used and their photoluminescence (PL) response investigated. UV-vis absorption studies show that the various dopant ions can effectively tune energy band structure. The PL emission band is red shifted on Mn2+ doping (~575 nm) as compared to pure ZnS Q-dots (~420 nm) which is due to 4T1(G) → 6A1(S) radiative transitions. Blue/green-emission peaks at ~487 nm/~508 nm observed, respectively, on Co2+/Ag+ doping are probably arising from the recombination between the sulfur vacancy level and the new dopant level. Luminescence emission efficiency (LEE) is found to be maximum at 5 mol% Mn2+ doping and then decreases. On doping by Ag+ the LEE is found to be maximum at 2 mol% doping and almost completely quenched at 5 mol% doping. Contrary to the above, Co2+ quenched the overall PL." @default.
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- W2071002922 date "2012-07-01" @default.
- W2071002922 modified "2023-10-12" @default.
- W2071002922 title "Tunable visible emission of TM-doped ZnS quantum dots (TM: Mn<sup>2+</sup>, Co<sup>2+</sup>, Ag<sup>+</sup>)" @default.
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- W2071002922 doi "https://doi.org/10.1051/epjap/2012120148" @default.
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