6533b7d8fe1ef96bd126b5e7
RESEARCH PRODUCT
Luminescence Properties and Energy Transfer Processes in Nanosized Cerium Doped YAG
Witold LojkowskiLarisa GrigorjevaTadeusz ChudobaS. ChernovVladimir Pankratovsubject
Nuclear and High Energy PhysicsPhotoluminescenceMaterials scienceCondensed Matter::OtherDopingPhysics::Opticschemistry.chemical_elementNanoparticlePhotochemistryNanoceramicCondensed Matter::Materials ScienceCeriumNuclear Energy and EngineeringNanocrystalchemistryPhysics::Atomic and Molecular ClustersCharge carrierElectrical and Electronic EngineeringLuminescencedescription
Luminescence properties of cerium doped Y3Al5O12 (YAG) nanocrystals in form of nanopowders and nanoceramics have been studied. The comparative analysis of luminescence characteristics for nano- and single-crystals has been done. It was detected that an excitonic mechanism of the energy transfer from the host lattice to cerium ions does not work in nanopowders and nanoceramics. It was also shown that antisite-related and self-trapped exciton-related luminescence bands are suppressed strongly in nanopowders, and it can be excited only under certain circumstances. These bands practically disappeared in the nanoceramic samples. It was suggested that nanoparticle's surface, which is an efficient trap for excitons and charge carriers, plays the crucial role in peculiarities of luminescence characteristics in nanocrystals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-06-01 | IEEE Transactions on Nuclear Science |