Synthesis and characterization of sol–gel derived ZnS : Mn2+ nanocrystallites embedded in a silica matrix

Bulletin of Materials Science

关键词: Zinc sulphide;    sol–gel;    nanoparticles;    luminescence;    ESR.;   

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Synthesis and characterization of undoped and Mn2+ doped ZnS nanocrystallites (radius 2–3 nm) embedded in a partially densified silica gel matrix are presented. Optical transmittance, photoluminescence (PL), ellipsometric and electron spin resonance measurements revealed manifestation of quantum size effect. PL spectra recorded at room temperature revealed broad blue emission signal centred at ∼ 420 nm and Mn2+ related yellow–orange band centred at ∼ 590 nm while ESR indicated that Mn in ZnS was present as dispersed impurity rather than Mn cluster.

【 授权许可】

CC BY