Synthesis and Laser Processing of ZnO Nanocrystalline Thin Films

Autor: Marc Sentis, Igor Ozerov, Wladimir Marine, Dimitri Nelson, Alexander V. Bulgakov
Přispěvatelé: Groupe de Physique des Etats Condensés (GPEC), Université de la Méditerranée - Aix-Marseille 2-Centre National de la Recherche Scientifique (CNRS), A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences [Moscow] (RAS), Institute of Thermophysics, Novosibirsk, Russia (Institute of Thermophysics, Novosibirsk, Russia), Institute of Thermophysics, Novosibirsk, Russia, Laboratoire Lasers, Plasmas et Procédés photoniques (LP3), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), OZEROV, Igor, Centre Interdisciplinaire de Nanoscience de Marseille (CINaM), Institute of Thermophysics SB RAS, Novosibirsk (IT), Institute of Thermophysics SB RAS, Novosibirsk, Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)
Jazyk: angličtina
Rok vydání: 2003
Předmět:
Materials science
Photoluminescence
Annealing (metallurgy)
nanoclusters
General Physics and Astronomy
FOS: Physical sciences
Physics::Optics
nanocluster
Radiation
7. Clean energy
Fluence
Pulsed laser deposition
Nanoclusters
Condensed Matter::Materials Science
Physics - Chemical Physics
Zinc oxide
Physics::Atomic and Molecular Clusters
Laser processing
Chemical Physics (physics.chem-ph)
Condensed Matter - Materials Science
business.industry
Materials Science (cond-mat.mtrl-sci)
Surfaces and Interfaces
General Chemistry
Condensed Matter Physics
[PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Surfaces
Coatings and Films
ZnO
laser ablation
laser annealing
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Optoelectronics
annealing
photoluminescence
[PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
business
Luminescence
81.15.Fg
81.05.Ys
78.55.Et
61.80.Ba
Zdroj: Applied Surface Science
Applied Surface Science, 2003, 212-213, pp.349-352
International Conference on Solid Films and Surfaces ICSFS-11
International Conference on Solid Films and Surfaces ICSFS-11, 2002, Marseille, France
Applied Surface Science, Elsevier, 2003, 212-213, pp.349-352
ISSN: 0169-4332
Popis: International audience; We present the results on pulsed laser deposition of high quality nanocrystalline zinc oxide films. Using mass and optical spectroscopy methods we show that ablation into the gas (O2 or O2+He) leads to the very efficient formation of nanoclusters in gas phase. Oxygen is reactive agent and helium helps to cool and to slow down the nanoclusters during their condensation and deposition. The size of the clusters can be varied from 5 to 20 nm and depends on the preparation conditions. Thin films of nanostructured ZnO have wurtzite crystalline structure with c-axis perpendicular to the substrate surface. Optical and lasing properties of the films were studied by conventional photoluminescence and excitation spectroscopy using femtosecond laser. The photoluminescence spectra consist of wide green defect-related band and narrow UV excitonic emission band. Optimisation of conditions of synthesis and post-growth laser annealing of the films leads to increase in the intensity of the excitonic luminescence and to reduction of the green emission. Under femtosecond laser excitation we observe appearance of the UV emission bands related to exciton-exciton collisions (P-band) and to electron-hole plasma recombination. The spectral position of the last one shifts to lower energy side with increasing excitation density. Finally, we demonstrate laser emission from ZnO nanoclusters at room temperature.
Databáze: OpenAIRE
Externí odkaz: