Stability of the Mn photoluminescence in bifunctional ZnS:0.05Mn nanoparticles

摘要: We investigate the stability of orange band photoluminescence (PL) bifunctional nanoparticles Mn2+-doped ZnS at 5% (ZnS:0.05Mn). These 4-nm are synthesized via a one-step inorganic chemical route under ambient conditions. The phase, crystallinity, and morphology analyzed X-ray electron diffractions high-resolution microscopy. Based on thermally activated carrier-transfer model, it is found that emission rather stable low temperatures possesses thermal activation energy ∼18 meV. analysis PL decay curves suggests coexistence multiple lifetimes, shortening observed in lifetime not due to Mn2+ ions, temperature range from 10 K 300 K. measured M-H hysteresis loops demonstrate ZnS:0.05Mn exhibit ferromagnetic ordering below 30 K, unlike its bulk counterpart. No magnetic field dependence intensity up 1 T. ...