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RESEARCH PRODUCT
Excitonic luminescence in ZnO nanopowders and ceramics
Tadeusz ChudobaDonāts MillersKrisjanis SmitsK. BienkowskiClaude J.a. MontyLarisa GrigorjevaVladimir PankratovJ.d. FidelusWitold ŁOjkowskisubject
PhotoluminescenceMaterials scienceAnnealing (metallurgy)Organic ChemistryDopingAnalytical chemistryMineralogyAtomic and Molecular Physics and OpticsGrain sizeElectronic Optical and Magnetic MaterialsAfterglowInorganic Chemistryvisual_artvisual_art.visual_art_mediumCeramicElectrical and Electronic EngineeringPhysical and Theoretical ChemistryTime-resolved spectroscopyLuminescenceSpectroscopydescription
Abstract Fast photoluminescence spectra in the spectral region of 3.1–3.45 eV in ZnO and ZnO:Al ceramics were studied at 14 and 300 K. Ceramics with grains smaller than 100 nm were sintered from nanopowders by high pressure (8 GPa) and low temperature (350 °C). Ceramics with grain sizes 1–5 μm were sintered at 1400 °C. It is shown that excitonic luminescence spectra depend on the ceramics grain size, post preparing annealing and doping. The excitonic luminescence decay time was faster than 2 ns and the afterglow at 30 ns was ∼0.05%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-10-01 | Optical Materials |