M. Addou - Academia.edu (original) (raw)
Papers by M. Addou
2011 13th International Conference on Transparent Optical Networks, 2011
Lithium-and erbium-codoped zinc oxide thin films have been successfully deposited on heated glass... more Lithium-and erbium-codoped zinc oxide thin films have been successfully deposited on heated glass substrates using the spray pyrolysis technique. This study is an investigation of the Li effect on the enhancement of cathodoluminescent intensity on Er-monodoped ZnO films. Crystallinity, morphology and luminescence characteristics were investigated in detail by x-ray diffraction, scanning electron microscopy and cathodoluminescence. The Li-Er-codoped ZnO films show a higher intensity of blue and red emissions than the Er-monodoped ZnO films. The behaviour of that enhancement is attributed to the modification of the local symmetry of the Er 3+ ion, which increases the intra 4f transition of the Er 3+ ion. The blue and red emissions have an important effect to improve the capacity of data storage.
Optics & Laser Technology, 2004
An appearance of the giant photoelastic e ect (up to 17 × 10 −13 m 2 =N) (for the wavelength of a... more An appearance of the giant photoelastic e ect (up to 17 × 10 −13 m 2 =N) (for the wavelength of about 450 nm) in the ZnO ÿlms doped by erbium ions is found. For a description of the observed phenomenon, a complex approach including self-consistent band structure calculations together with the appropriate molecular dynamics simulations of the interfaces was used. The origin of the observed e ect is caused by the appearance of substantial charge density redistribution within the crystalline ZnO-Er 3+ ÿlms deposited on the bare glass substrate as well as due to additional charge density polarization by the Er. A possibility of enhancement of the photoelastic coe cients 2222 at = 600 nm was proved for the ÿrst time by the simultaneous use of interface charge density redistribution and cationic doping of the ÿlms. ?
Thin Solid Films, 2004
Groupe d9etude des materiaux optoelectronique, Faculte des Sciences et techniques, Gueliz-marrake... more Groupe d9etude des materiaux optoelectronique, Faculte des Sciences et techniques, Gueliz-marrakech, B. P. 618 Marrakech, Morocco a´´´Ú niversite Ibn Tofail, Lab. d'optoelectronique et de physico-chimie des materiaux, Faculte des sciences, B. P. 133, Kenitra, Morocco b´´´Ú niversite de Reims, UFR Sciences, UTAP-LMET, UPRES EA 2061, Abstract Tin doped indium oxide thin films In O -Sn, have been deposited on glass substrate at various temperatures (723, 748 and 773 2 3
Solar Energy Materials and Solar Cells, 2009
Fluorine-doped indium oxide thin films, F-In 2 O 3 , prepared by the spray pyrolysis technique on... more Fluorine-doped indium oxide thin films, F-In 2 O 3 , prepared by the spray pyrolysis technique on glass substrates have been studied using cathodoluminescence spectroscopy, X-ray diffraction and spectrophotometry. These films, deposited at the optimal substrate temperature (T s ¼ 450 1C), crystallize in a cubic structure with a preferential orientation along the (4 0 0) direction. For this temperature, the electrical resistivity is in the order of 6 Â 10 À3 O cm and the average optical transmission in the visible region is larger than 95%. At room temperature, the cathodoluminescence spectra of F-In 2 O 3 present two emission peaks: blue indirect band gap peak at 410 nm and a red emission at 650 nm.
Semiconductor Science and Technology, 2002
Undoped ZnO and F-doped ZnFxO(1-x) (x = 5 at%) films prepared by the spray pyrolysis (SP) techniq... more Undoped ZnO and F-doped ZnFxO(1-x) (x = 5 at%) films prepared by the spray pyrolysis (SP) technique have been studied using cathodoluminescence imaging and spectroscopy, x-ray diffraction and spectrophotometry. These films, deposited at the optimal substrate temperature (Ts = 450 °C), present a hexagonal close packed structure. The doping of this material with fluorine keeps their optical absorption threshold unchanged.
physica status solidi (b), 2002
ABSTRACT
Materials Chemistry and Physics, 2003
Cathodoluminescence (CL) spectroscopy, X-ray diffraction and spectrophotometery have been studied... more Cathodoluminescence (CL) spectroscopy, X-ray diffraction and spectrophotometery have been studied of undoped and tin (Sn)-doped ZnO films prepared by spray pyrolysis (SP) technique of zinc chloride and tin chloride. The luminescence films had a polycrystalline hexagonal wurtzite type structure. At room temperature, the cathodoluminescence (CL) spectra of the undoped and doped ZnO films exhibit the common near ultra-violet (UV) band-gap peak at l = 382 nm but they differ as regards their visible emissions. The undoped ZnO emits an intensive blue-green light (L = 520 nm) and a red emission (L = 672 nm). The presence of tin gives rise to a new light emission corresponding to L = 463 nm and the extension of blue-green light typical of the intrinsic behavior of the material. CL imaging of undoped ZnO films show that the luminescence is located at defined sites giving rise to a grain-like structure inherent to the surface morphology. The presence of tin in the material leads to great luminescent spots, attributed to large grain sizes.
Materials Chemistry and Physics, 2003
Undoped and Al-doped zinc oxide (ZnO) thin lms have been prepared by spray pyrolysis (SP), and th... more Undoped and Al-doped zinc oxide (ZnO) thin lms have been prepared by spray pyrolysis (SP), and the effect of doping on structural properties and cathodoluminescence (CL) imaging and spectroscopy has been investigated. These lms, deposited at an optimal substrate temperature (T s = 450 • C), have a hexagonal close-packed structure. At room temperature, the CL spectra of the undoped and doped ZnO lms exhibit the common near ultra-violet band gap peak at λ = 382 nm, but they differ as regard to the visible emissions. The undoped ZnO emits an intensive blue-green light at λ = 520 nm and a red emission at λ = 672 nm. The presence of aluminium gives rise to a new light typical of the intrinsic behaviour of the material. CL imaging of the undoped ZnO lms shows that the luminescence is located at de ned sites with a grain-like structure inherent to the sample surface morphology. The presence of aluminium leads to a homogenous repartition of the emitting centres.
Materials Chemistry and Physics, 2005
Spray pyrolysis system was used to obtain tin doped ZnO thin films on heated glass substrates. Th... more Spray pyrolysis system was used to obtain tin doped ZnO thin films on heated glass substrates. The structural, optical and electrical properties of the films were been studied. The effect of heat treatment for as deposited films in vacuum was studied. X-ray diffraction spectra showed that doping improves the crystallinity. Tin doped ZnO films with over 85% transmittance and conductivity as low as 5 × 10 −2 cm were obtained. On the other hand, the annealing of as deposited films in vacuum leads to reduction of resistivity and improvement of crystallinity and optical transmission.
Journal of Physics: Condensed Matter, 2002
A giant linear electro-optics (Pockels) effect (up to 17 pm V −1 ) (for wavelength about 435 nm) ... more A giant linear electro-optics (Pockels) effect (up to 17 pm V −1 ) (for wavelength about 435 nm) in ZnO crystalline films doped with fluorine and deposited on bare glass has been found. For description of the observed phenomenon, a complex approach including self-consistent band structure calculations together with an appropriate molecular dynamics simulation of the interface structure was applied. Experimental ellipsometric and refractive index measurements confirm an efficiency of the mentioned approach for description of the observed interface (between the film and glass) processes. The origin of the observed effect is caused by substantial non-centrosymmetric charge density distribution between the ZnO wurtzite-like crystalline films and the bare glass substrate, as well as by additional charge density polarization caused by fluorine atoms.
Journal of Optics A: Pure and Applied Optics, 2003
Nano-sized thin layers (1-2 nm) between In 2 O 3 :Sn (ITO) crystalline films and glass substrates... more Nano-sized thin layers (1-2 nm) between In 2 O 3 :Sn (ITO) crystalline films and glass substrates were studied using photo-induced optical and second-order nonlinear optical (second harmonic generation) effects. Photo-induced changes in the effective energy gap were found for the first time in In 2 O 3 films doped using different amounts of Sn deposited on the glass substrates. The photo-induced second-order nonlinear optical susceptibilities show a good correlation with the behaviour of the fundamental absorption edge. The maximal response of the photo-induced signal was observed for pump-probe delay times equal to approximately 26 ps. The experimental measurements performed indicate that the observed effects are stimulated by two factors: the first one is connected with the interface potential gradients on the boarder glass-ITO film. The second one is a consequence of the additional polarization due to the insertion of differing amounts of Sn atoms. The observed phenomenon may be proposed as a sensitive tool for the investigation of thin semiconducting-glass interface layers.
Journal of Applied Physics, 2003
The interface growth and topology of sprayed ZnO thin films are examined here using the spatial s... more The interface growth and topology of sprayed ZnO thin films are examined here using the spatial scaling approach to the film surface in relation with the effect of a spraying deposition flow rate, f, ranging between 1 and 8 mil min-1. This thermally activated process is performed at the optimal temperature of the material (T=723 K). Two different growth mechanisms
Crystal Research and Technology, 2002
Large linear electrooptics (the Pockels effect) of up to 17 pm/V for the wavelength 435 nm has be... more Large linear electrooptics (the Pockels effect) of up to 17 pm/V for the wavelength 435 nm has been observed in ZnO films doped by fluorine and deposited on bare glass. In order to describe the phenomenon observed, a complex approach, including self-consistent band structure calculations together with the appropriate molecular dynamics simulations of the interfaces, was applied. The origin of the effect observed is linked to substantial charge density non-centrosymmetry between the wurtzitelike crystalline films and the bare glass substrate, as well as to additional charge density polarisation caused by the fluorine.
Applied Surface Science, 2002
The effective nanometer-sized thin layer (about 1-2 nm) located between a crystalline ZnS film an... more The effective nanometer-sized thin layer (about 1-2 nm) located between a crystalline ZnS film and glass substrate is studied here using photoinduced optical and second-order non-linear optical (second harmonic generation (SHG) and electrooptics effects) techniques. A photoinduced shift of the effective energy gap is found for the first time in ZnS films doped with the same amount (4 at.%) of different elements, namely, In, Al and Sn. The photoinduced second-order non-linear optical properties (linear electrooptics (LEO) and SHG) of the specimens show a good correlation with the corresponding features of the linear optical susceptibilities, particularly, the imaginary part of dielectric susceptibility near the absorption edge. The maximal response of the photoinduced signal is observed for the pump-probe delaying time of about 20 ps. The performed experimental measurements indicate that the observed effects are stimulated by two factors: the first one is connected with the interface potential gradients at the glass-ZnS film boarder; the second one is a consequence of the additional polarization due to the insertion of Al, In and Sn atoms. The observed phenomenon may be proposed as a sensitive tool for investigation of thin semiconducting-glass interface layer. Moreover, such nanolayers may be applied in quantum electronic devices. #
Journal De Chimie Physique Et De Physico-chimie Biologique, 1999
Thin films of transparent undoped and indium doped ZnO have been deposited using the spray pyroly... more Thin films of transparent undoped and indium doped ZnO have been deposited using the spray pyrolysis technique. The structural, optical properties and electrical resistivity of these films are investigated as a function of substrate temperature and indium concentration in the solution. X-ray diffraction showed that the films prepared at substrate temperature greater than 300 °C exhibit the hexagonal wurtzite structure
Materials Chemistry and Physics
Tungsten trioxide (WO 3 ) thin films were prepared by spray pyrolysis. The obtained films were am... more Tungsten trioxide (WO 3 ) thin films were prepared by spray pyrolysis. The obtained films were amorphous and dark-brown. The films were subsequently annealed at 500 • C in an air atmosphere for different annealing times. The IR measurements revealed the presence of water in our films and enabled us to follow its evolution as a function of the annealing conditions. The composition of the films was investigated by X-ray photoelectron spectroscopy. W 4f and O 1s core level peaks were decomposed and all the hidden peaks were identified. The XRD study showed that the crystallinity increased with the annealing time. The optical study indicated that the annealed films were transparent. The optical gap and the refractive index were found to be in agreement with data in the literature. Nevertheless, spectral measurements of the diffuse transmittance showed that this component was significant and varied with the annealing time.
Defect and Diffusion Forum, 2001
Asian Journal of Materials Science, 2010
Solar Energy Materials and Solar Cells, 2001
Cerium dioxide (CeO2) thin films were prepared by spray pyrolysis using hydrated cerium chloride ... more Cerium dioxide (CeO2) thin films were prepared by spray pyrolysis using hydrated cerium chloride (CeCl3·7H2O) as source compound. The films prepared at substrate temperatures below 300°C were amorphous, while those prepared at optimal conditions (Ts=500°C,s=5ml/min) were polycrystalline, cubic in structure, preferentially oriented along the (200) direction and exhibited a transmittance value greater than 80% in the visible range. The cyclic
2011 13th International Conference on Transparent Optical Networks, 2011
Lithium-and erbium-codoped zinc oxide thin films have been successfully deposited on heated glass... more Lithium-and erbium-codoped zinc oxide thin films have been successfully deposited on heated glass substrates using the spray pyrolysis technique. This study is an investigation of the Li effect on the enhancement of cathodoluminescent intensity on Er-monodoped ZnO films. Crystallinity, morphology and luminescence characteristics were investigated in detail by x-ray diffraction, scanning electron microscopy and cathodoluminescence. The Li-Er-codoped ZnO films show a higher intensity of blue and red emissions than the Er-monodoped ZnO films. The behaviour of that enhancement is attributed to the modification of the local symmetry of the Er 3+ ion, which increases the intra 4f transition of the Er 3+ ion. The blue and red emissions have an important effect to improve the capacity of data storage.
Optics & Laser Technology, 2004
An appearance of the giant photoelastic e ect (up to 17 × 10 −13 m 2 =N) (for the wavelength of a... more An appearance of the giant photoelastic e ect (up to 17 × 10 −13 m 2 =N) (for the wavelength of about 450 nm) in the ZnO ÿlms doped by erbium ions is found. For a description of the observed phenomenon, a complex approach including self-consistent band structure calculations together with the appropriate molecular dynamics simulations of the interfaces was used. The origin of the observed e ect is caused by the appearance of substantial charge density redistribution within the crystalline ZnO-Er 3+ ÿlms deposited on the bare glass substrate as well as due to additional charge density polarization by the Er. A possibility of enhancement of the photoelastic coe cients 2222 at = 600 nm was proved for the ÿrst time by the simultaneous use of interface charge density redistribution and cationic doping of the ÿlms. ?
Thin Solid Films, 2004
Groupe d9etude des materiaux optoelectronique, Faculte des Sciences et techniques, Gueliz-marrake... more Groupe d9etude des materiaux optoelectronique, Faculte des Sciences et techniques, Gueliz-marrakech, B. P. 618 Marrakech, Morocco a´´´Ú niversite Ibn Tofail, Lab. d'optoelectronique et de physico-chimie des materiaux, Faculte des sciences, B. P. 133, Kenitra, Morocco b´´´Ú niversite de Reims, UFR Sciences, UTAP-LMET, UPRES EA 2061, Abstract Tin doped indium oxide thin films In O -Sn, have been deposited on glass substrate at various temperatures (723, 748 and 773 2 3
Solar Energy Materials and Solar Cells, 2009
Fluorine-doped indium oxide thin films, F-In 2 O 3 , prepared by the spray pyrolysis technique on... more Fluorine-doped indium oxide thin films, F-In 2 O 3 , prepared by the spray pyrolysis technique on glass substrates have been studied using cathodoluminescence spectroscopy, X-ray diffraction and spectrophotometry. These films, deposited at the optimal substrate temperature (T s ¼ 450 1C), crystallize in a cubic structure with a preferential orientation along the (4 0 0) direction. For this temperature, the electrical resistivity is in the order of 6 Â 10 À3 O cm and the average optical transmission in the visible region is larger than 95%. At room temperature, the cathodoluminescence spectra of F-In 2 O 3 present two emission peaks: blue indirect band gap peak at 410 nm and a red emission at 650 nm.
Semiconductor Science and Technology, 2002
Undoped ZnO and F-doped ZnFxO(1-x) (x = 5 at%) films prepared by the spray pyrolysis (SP) techniq... more Undoped ZnO and F-doped ZnFxO(1-x) (x = 5 at%) films prepared by the spray pyrolysis (SP) technique have been studied using cathodoluminescence imaging and spectroscopy, x-ray diffraction and spectrophotometry. These films, deposited at the optimal substrate temperature (Ts = 450 °C), present a hexagonal close packed structure. The doping of this material with fluorine keeps their optical absorption threshold unchanged.
physica status solidi (b), 2002
ABSTRACT
Materials Chemistry and Physics, 2003
Cathodoluminescence (CL) spectroscopy, X-ray diffraction and spectrophotometery have been studied... more Cathodoluminescence (CL) spectroscopy, X-ray diffraction and spectrophotometery have been studied of undoped and tin (Sn)-doped ZnO films prepared by spray pyrolysis (SP) technique of zinc chloride and tin chloride. The luminescence films had a polycrystalline hexagonal wurtzite type structure. At room temperature, the cathodoluminescence (CL) spectra of the undoped and doped ZnO films exhibit the common near ultra-violet (UV) band-gap peak at l = 382 nm but they differ as regards their visible emissions. The undoped ZnO emits an intensive blue-green light (L = 520 nm) and a red emission (L = 672 nm). The presence of tin gives rise to a new light emission corresponding to L = 463 nm and the extension of blue-green light typical of the intrinsic behavior of the material. CL imaging of undoped ZnO films show that the luminescence is located at defined sites giving rise to a grain-like structure inherent to the surface morphology. The presence of tin in the material leads to great luminescent spots, attributed to large grain sizes.
Materials Chemistry and Physics, 2003
Undoped and Al-doped zinc oxide (ZnO) thin lms have been prepared by spray pyrolysis (SP), and th... more Undoped and Al-doped zinc oxide (ZnO) thin lms have been prepared by spray pyrolysis (SP), and the effect of doping on structural properties and cathodoluminescence (CL) imaging and spectroscopy has been investigated. These lms, deposited at an optimal substrate temperature (T s = 450 • C), have a hexagonal close-packed structure. At room temperature, the CL spectra of the undoped and doped ZnO lms exhibit the common near ultra-violet band gap peak at λ = 382 nm, but they differ as regard to the visible emissions. The undoped ZnO emits an intensive blue-green light at λ = 520 nm and a red emission at λ = 672 nm. The presence of aluminium gives rise to a new light typical of the intrinsic behaviour of the material. CL imaging of the undoped ZnO lms shows that the luminescence is located at de ned sites with a grain-like structure inherent to the sample surface morphology. The presence of aluminium leads to a homogenous repartition of the emitting centres.
Materials Chemistry and Physics, 2005
Spray pyrolysis system was used to obtain tin doped ZnO thin films on heated glass substrates. Th... more Spray pyrolysis system was used to obtain tin doped ZnO thin films on heated glass substrates. The structural, optical and electrical properties of the films were been studied. The effect of heat treatment for as deposited films in vacuum was studied. X-ray diffraction spectra showed that doping improves the crystallinity. Tin doped ZnO films with over 85% transmittance and conductivity as low as 5 × 10 −2 cm were obtained. On the other hand, the annealing of as deposited films in vacuum leads to reduction of resistivity and improvement of crystallinity and optical transmission.
Journal of Physics: Condensed Matter, 2002
A giant linear electro-optics (Pockels) effect (up to 17 pm V −1 ) (for wavelength about 435 nm) ... more A giant linear electro-optics (Pockels) effect (up to 17 pm V −1 ) (for wavelength about 435 nm) in ZnO crystalline films doped with fluorine and deposited on bare glass has been found. For description of the observed phenomenon, a complex approach including self-consistent band structure calculations together with an appropriate molecular dynamics simulation of the interface structure was applied. Experimental ellipsometric and refractive index measurements confirm an efficiency of the mentioned approach for description of the observed interface (between the film and glass) processes. The origin of the observed effect is caused by substantial non-centrosymmetric charge density distribution between the ZnO wurtzite-like crystalline films and the bare glass substrate, as well as by additional charge density polarization caused by fluorine atoms.
Journal of Optics A: Pure and Applied Optics, 2003
Nano-sized thin layers (1-2 nm) between In 2 O 3 :Sn (ITO) crystalline films and glass substrates... more Nano-sized thin layers (1-2 nm) between In 2 O 3 :Sn (ITO) crystalline films and glass substrates were studied using photo-induced optical and second-order nonlinear optical (second harmonic generation) effects. Photo-induced changes in the effective energy gap were found for the first time in In 2 O 3 films doped using different amounts of Sn deposited on the glass substrates. The photo-induced second-order nonlinear optical susceptibilities show a good correlation with the behaviour of the fundamental absorption edge. The maximal response of the photo-induced signal was observed for pump-probe delay times equal to approximately 26 ps. The experimental measurements performed indicate that the observed effects are stimulated by two factors: the first one is connected with the interface potential gradients on the boarder glass-ITO film. The second one is a consequence of the additional polarization due to the insertion of differing amounts of Sn atoms. The observed phenomenon may be proposed as a sensitive tool for the investigation of thin semiconducting-glass interface layers.
Journal of Applied Physics, 2003
The interface growth and topology of sprayed ZnO thin films are examined here using the spatial s... more The interface growth and topology of sprayed ZnO thin films are examined here using the spatial scaling approach to the film surface in relation with the effect of a spraying deposition flow rate, f, ranging between 1 and 8 mil min-1. This thermally activated process is performed at the optimal temperature of the material (T=723 K). Two different growth mechanisms
Crystal Research and Technology, 2002
Large linear electrooptics (the Pockels effect) of up to 17 pm/V for the wavelength 435 nm has be... more Large linear electrooptics (the Pockels effect) of up to 17 pm/V for the wavelength 435 nm has been observed in ZnO films doped by fluorine and deposited on bare glass. In order to describe the phenomenon observed, a complex approach, including self-consistent band structure calculations together with the appropriate molecular dynamics simulations of the interfaces, was applied. The origin of the effect observed is linked to substantial charge density non-centrosymmetry between the wurtzitelike crystalline films and the bare glass substrate, as well as to additional charge density polarisation caused by the fluorine.
Applied Surface Science, 2002
The effective nanometer-sized thin layer (about 1-2 nm) located between a crystalline ZnS film an... more The effective nanometer-sized thin layer (about 1-2 nm) located between a crystalline ZnS film and glass substrate is studied here using photoinduced optical and second-order non-linear optical (second harmonic generation (SHG) and electrooptics effects) techniques. A photoinduced shift of the effective energy gap is found for the first time in ZnS films doped with the same amount (4 at.%) of different elements, namely, In, Al and Sn. The photoinduced second-order non-linear optical properties (linear electrooptics (LEO) and SHG) of the specimens show a good correlation with the corresponding features of the linear optical susceptibilities, particularly, the imaginary part of dielectric susceptibility near the absorption edge. The maximal response of the photoinduced signal is observed for the pump-probe delaying time of about 20 ps. The performed experimental measurements indicate that the observed effects are stimulated by two factors: the first one is connected with the interface potential gradients at the glass-ZnS film boarder; the second one is a consequence of the additional polarization due to the insertion of Al, In and Sn atoms. The observed phenomenon may be proposed as a sensitive tool for investigation of thin semiconducting-glass interface layer. Moreover, such nanolayers may be applied in quantum electronic devices. #
Journal De Chimie Physique Et De Physico-chimie Biologique, 1999
Thin films of transparent undoped and indium doped ZnO have been deposited using the spray pyroly... more Thin films of transparent undoped and indium doped ZnO have been deposited using the spray pyrolysis technique. The structural, optical properties and electrical resistivity of these films are investigated as a function of substrate temperature and indium concentration in the solution. X-ray diffraction showed that the films prepared at substrate temperature greater than 300 °C exhibit the hexagonal wurtzite structure
Materials Chemistry and Physics
Tungsten trioxide (WO 3 ) thin films were prepared by spray pyrolysis. The obtained films were am... more Tungsten trioxide (WO 3 ) thin films were prepared by spray pyrolysis. The obtained films were amorphous and dark-brown. The films were subsequently annealed at 500 • C in an air atmosphere for different annealing times. The IR measurements revealed the presence of water in our films and enabled us to follow its evolution as a function of the annealing conditions. The composition of the films was investigated by X-ray photoelectron spectroscopy. W 4f and O 1s core level peaks were decomposed and all the hidden peaks were identified. The XRD study showed that the crystallinity increased with the annealing time. The optical study indicated that the annealed films were transparent. The optical gap and the refractive index were found to be in agreement with data in the literature. Nevertheless, spectral measurements of the diffuse transmittance showed that this component was significant and varied with the annealing time.
Defect and Diffusion Forum, 2001
Asian Journal of Materials Science, 2010
Solar Energy Materials and Solar Cells, 2001
Cerium dioxide (CeO2) thin films were prepared by spray pyrolysis using hydrated cerium chloride ... more Cerium dioxide (CeO2) thin films were prepared by spray pyrolysis using hydrated cerium chloride (CeCl3·7H2O) as source compound. The films prepared at substrate temperatures below 300°C were amorphous, while those prepared at optimal conditions (Ts=500°C,s=5ml/min) were polycrystalline, cubic in structure, preferentially oriented along the (200) direction and exhibited a transmittance value greater than 80% in the visible range. The cyclic