Preparation, structural and optical characterization of nanocrystalline ZnO doped with luminescent Ag-nanoclustersстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 сентября 2013 г.
Аннотация:Nanocrystalline ZnO doped with Ag-nanoclusters has been
synthesized by a salt solid state reaction. Three overlapping broad emission
bands due to the Ag nanoclusters have been detected at about 570, 750 and
900 nm. These emission bands are excited by an energy transfer from the
exciton state of the ZnO host when pumped in the wavelength range from
250 to 400 nm. The 900 nm emission band shows characteristic orbital
splitting into three components pointing out that the anisotropic crystalline
wurtzite host of ZnO is responsible for this feature. Heat-treatment and
temperature dependence studies confirm the origin of these emission bands.
An energy level diagram for the emission process and a model for Ag
nanoclusters sites are suggested. The emission of nanocrystalline ZnO
doped with Ag nanoclusters may be applied for white light generation,
displays driven by UV light, down-convertors for solar cells and
luminescent lamps.