Title :
Luminescence Properties of ZnO Nanocrystals and Ceramics
Author :
Grigorjeva, Larisa ; Millers, Donats ; Grabis, Janis ; Monty, Claude ; Kalinko, Aleksandr ; Smits, Krishjanis ; Pankratov, Vladimir ; Lojkowski, Witold
Author_Institution :
Inst. of Solid State Phys., Latvia Univ., Riga
fDate :
6/1/2008 12:00:00 AM
Abstract :
The luminescence excitation spectra, luminescence spectra and the nanosecond-scale decay kinetics were studied. The ZnO and ZnO:Al nanopowders were prepared by vaporization-condensation in a solar furnace using different raw powders: commercial, hydrothermal and those obtained by plasma synthesis. Exciton-phonon as well as exciton-exciton interaction processes in nanopowders, a bulk crystal and ZnO ceramics were studied and compared. The fast decay and low afterglow intensity of ZnO nanopowders and ceramics support these materials for scintillators.
Keywords :
II-VI semiconductors; afterglows; aluminium; cathodoluminescence; ceramics; condensation; crystal growth from solution; materials preparation; nanostructured materials; nanotechnology; phonon-exciton interactions; plasma materials processing; semiconductor doping; time resolved spectra; wide band gap semiconductors; zinc compounds; ZnO; ZnO:Al; afterglow intensity; cathodoluminescence excitation; ceramics; doping; exciton-exciton interaction process; exciton-phonon interaction process; hydrothermal process; nanocrystals; nanopowder preparation; nanosecond-scale decay kinetics; plasma synthesis; scintillators; solar furnace; time-resolved luminescence excitation spectra; vaporization-condensation technique; Ceramics; Furnaces; Kinetic theory; Luminescence; Nanocrystals; Nanoparticles; Plasma applications; Plasma properties; Powders; Zinc oxide; Ceramic; ZnO; fast luminescence; nanopowders;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2008.921931
