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Violet-blue photoluminescence in aluminium oxide films prepared by ultrasonic spray pyrolysis

Identifieur interne : 002488 ( Main/Exploration ); précédent : 002487; suivant : 002489

Violet-blue photoluminescence in aluminium oxide films prepared by ultrasonic spray pyrolysis

Auteurs : A. Ortiz [Mexique] ; J. C Alonso [Mexique] ; V. Pankov [Mexique] ; D. Albarran [Mexique]

Source :

Journal of Luminescence [ 0022-2313 ] ; 1999.

RBID : ISTEX:F490F18DC3060ED579F5F1A68B534039204F1090

Descripteurs français

Wicri :
- topic : Aluminium, Oxyde.

English descriptors

Abstract

Abstract: Violet-blue photoluminescent emission has been observed in aluminium oxide films deposited by the ultrasonic spray pyrolysis process at atmospheric pressure, using solutions of 0.05M aluminium acetylacetonate in a mixture of two parts of deionised water and two parts of methanol and aluminium chloride in the same solvent mixture. The films were deposited at substrate temperatures in the range from 240 to 440°C. The refractive index has values lower than those associated with crystalline phases of Al2O3. These values are due to the amorphous nature of the deposited films and the incorporation of organic or chlorine related radicals. The photoluminescence excitation spectra show two peaks located at 281 and 371nm, the latter being with higher intensity. The photoluminescent emission spectra are constituted by a broad band with a peak located at 405nm and, it has a maximum intensity for the sample prepared at 380°C. It is suggested that this emission is associated with radiative recombination from an excited level of the aluminum ions. The photoluminescence emission spectra can be formed by several contributors, for all the samples, which suggests that these emissions are associated with aluminium ions incorporated in excess in aluminium oxide host on different sites, as it has been observed in several glasses. From an Arrhenius plot of the intensity of the peak located around 405nm, as a function of substrate temperature an activation energy of 1.16eV has been calculated.

Url:

https://api.istex.fr/document/F490F18DC3060ED579F5F1A68B534039204F1090/fulltext/pdf

DOI: 10.1016/S0022-2313(98)00056-8

Affiliations:

Mexique

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Le document en format XML

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<author><name sortKey="Alonso, J C" sort="Alonso, J C" uniqKey="Alonso J" first="J. C" last="Alonso">J. C Alonso</name>
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<author><name sortKey="Pankov, V" sort="Pankov, V" uniqKey="Pankov V" first="V" last="Pankov">V. Pankov</name>
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<series><title level="j">Journal of Luminescence</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term>
<term>Alanol groups</term>
<term>Alumina</term>
<term>Aluminium</term>
<term>Aluminium acetylacetonate</term>
<term>Aluminium atoms</term>
<term>Aluminium chloride</term>
<term>Aluminium ions</term>
<term>Aluminium oxide</term>
<term>Aluminium oxide host</term>
<term>Aluminium source material</term>
<term>Amorphous nature</term>
<term>Arrhenius plot</term>
<term>Blue emission</term>
<term>Broad band</term>
<term>Broad band emission</term>
<term>Centre</term>
<term>Chemical reaction</term>
<term>Chlorine atoms</term>
<term>Chlorine radicals</term>
<term>Crystalline phases</term>
<term>Deionised water</term>
<term>Dissolution time</term>
<term>Elsevier science</term>
<term>Emission spectra</term>
<term>Emission spectrum</term>
<term>Energy levels</term>
<term>Excitation</term>
<term>Excitation spectrum</term>
<term>Excitation wavelength</term>
<term>General form</term>
<term>Growth process</term>
<term>Higher intensity</term>
<term>Light intensity</term>
<term>Luminescence</term>
<term>Luminescent</term>
<term>Luminescent center</term>
<term>Luminescent centers</term>
<term>Luminescent centre</term>
<term>Maximum intensity</term>
<term>Organic radicals</term>
<term>Organometallic</term>
<term>Organometallic radicals</term>
<term>Organometallic source compound</term>
<term>Ortiz</term>
<term>Other hand</term>
<term>Oxide</term>
<term>Photoluminescence</term>
<term>Photoluminescent</term>
<term>Photoluminescent centre</term>
<term>Photoluminescent emission</term>
<term>Pneumatic nozzle</term>
<term>Present case</term>
<term>Present work</term>
<term>Pyrolysis</term>
<term>Pyrosol</term>
<term>Pyrosol process</term>
<term>Refractive</term>
<term>Refractive index</term>
<term>Refractive index values</term>
<term>Source material</term>
<term>Spray pyrolysis technique</term>
<term>Strate temperature</term>
<term>Substrate temperature</term>
<term>Substrate temperatures</term>
<term>Ultrasonic spray pyrolysis process</term>
<term>Valence band</term>
<term>Vibronic spectra</term>
<term>Zinc oxide nanocrystals</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en"><term>Activation energy</term>
<term>Alanol groups</term>
<term>Alumina</term>
<term>Aluminium</term>
<term>Aluminium acetylacetonate</term>
<term>Aluminium atoms</term>
<term>Aluminium chloride</term>
<term>Aluminium ions</term>
<term>Aluminium oxide</term>
<term>Aluminium oxide host</term>
<term>Aluminium source material</term>
<term>Amorphous nature</term>
<term>Arrhenius plot</term>
<term>Blue emission</term>
<term>Broad band</term>
<term>Broad band emission</term>
<term>Centre</term>
<term>Chemical reaction</term>
<term>Chlorine atoms</term>
<term>Chlorine radicals</term>
<term>Crystalline phases</term>
<term>Deionised water</term>
<term>Dissolution time</term>
<term>Elsevier science</term>
<term>Emission spectra</term>
<term>Emission spectrum</term>
<term>Energy levels</term>
<term>Excitation</term>
<term>Excitation spectrum</term>
<term>Excitation wavelength</term>
<term>General form</term>
<term>Growth process</term>
<term>Higher intensity</term>
<term>Light intensity</term>
<term>Luminescence</term>
<term>Luminescent</term>
<term>Luminescent center</term>
<term>Luminescent centers</term>
<term>Luminescent centre</term>
<term>Maximum intensity</term>
<term>Organic radicals</term>
<term>Organometallic</term>
<term>Organometallic radicals</term>
<term>Organometallic source compound</term>
<term>Ortiz</term>
<term>Other hand</term>
<term>Oxide</term>
<term>Photoluminescence</term>
<term>Photoluminescent</term>
<term>Photoluminescent centre</term>
<term>Photoluminescent emission</term>
<term>Pneumatic nozzle</term>
<term>Present case</term>
<term>Present work</term>
<term>Pyrolysis</term>
<term>Pyrosol</term>
<term>Pyrosol process</term>
<term>Refractive</term>
<term>Refractive index</term>
<term>Refractive index values</term>
<term>Source material</term>
<term>Spray pyrolysis technique</term>
<term>Strate temperature</term>
<term>Substrate temperature</term>
<term>Substrate temperatures</term>
<term>Ultrasonic spray pyrolysis process</term>
<term>Valence band</term>
<term>Vibronic spectra</term>
<term>Zinc oxide nanocrystals</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Aluminium</term>
<term>Oxyde</term>
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<front><div type="abstract" xml:lang="en">Abstract: Violet-blue photoluminescent emission has been observed in aluminium oxide films deposited by the ultrasonic spray pyrolysis process at atmospheric pressure, using solutions of 0.05M aluminium acetylacetonate in a mixture of two parts of deionised water and two parts of methanol and aluminium chloride in the same solvent mixture. The films were deposited at substrate temperatures in the range from 240 to 440°C. The refractive index has values lower than those associated with crystalline phases of Al2O3. These values are due to the amorphous nature of the deposited films and the incorporation of organic or chlorine related radicals. The photoluminescence excitation spectra show two peaks located at 281 and 371nm, the latter being with higher intensity. The photoluminescent emission spectra are constituted by a broad band with a peak located at 405nm and, it has a maximum intensity for the sample prepared at 380°C. It is suggested that this emission is associated with radiative recombination from an excited level of the aluminum ions. The photoluminescence emission spectra can be formed by several contributors, for all the samples, which suggests that these emissions are associated with aluminium ions incorporated in excess in aluminium oxide host on different sites, as it has been observed in several glasses. From an Arrhenius plot of the intensity of the peak located around 405nm, as a function of substrate temperature an activation energy of 1.16eV has been calculated.</div>
</front>
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<tree><country name="Mexique"><noRegion><name sortKey="Ortiz, A" sort="Ortiz, A" uniqKey="Ortiz A" first="A" last="Ortiz">A. Ortiz</name>
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<name sortKey="Albarran, D" sort="Albarran, D" uniqKey="Albarran D" first="D" last="Albarran">D. Albarran</name>
<name sortKey="Alonso, J C" sort="Alonso, J C" uniqKey="Alonso J" first="J. C" last="Alonso">J. C Alonso</name>
<name sortKey="Pankov, V" sort="Pankov, V" uniqKey="Pankov V" first="V" last="Pankov">V. Pankov</name>
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Violet-blue photoluminescence in aluminium oxide films prepared by ultrasonic spray pyrolysis

Violet-blue photoluminescence in aluminium oxide films prepared by ultrasonic spray pyrolysis

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

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Pour manipuler ce document sous Unix (Dilib)

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