ENIT BP 37

Tunis, Tunisia

ENIT BP 37

Tunis, Tunisia
SEARCH FILTERS
Time filter
Source Type

Gaied I.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein | Rabeh M.B.,ENIT BP 37 | Rabhi A.,ENIT BP 37 | Kanzari M.,ENIT BP 37 | Yacoubi N.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein
Defect and Diffusion Forum | Year: 2010

In this work we describe a method based on the Photothermal Deflection Technique adapted for the determination of thermal properties of thin semiconductor layers deposited on a glass substrate. The sample placed in air is heated thanks a modulated pump uniform beam coming from a halogen lamp. The thermal conductivity and the thermal diffusivity are obtained by comparing the amplitude and phase variations versus square root modulation frequency between the experimental curves and the corresponding theoretical ones. The best coincidence permits to deduce the thermal properties of the sample. © (2010) Trans Tech Publications.


Gaied I.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein | Gassoumi A.,ENIT BP 37 | Kanzari M.,ENIT BP 37 | Yacoubi N.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein
Defect and Diffusion Forum | Year: 2010

Sulfosalt SnSb2S4 films have been deposited on glass substrates by thermal evaporation and subsequently thermally annealed in vacuum at temperatures from 100 to 250°C. Below a transition temperature of 140°C, the films are highly resistive with a dominant amorphous component, however above this temperature, the samples exhibit p+-type semiconductor behaviour with a dominant crystalline component.In this work we have studied the thermal and optical properties of these films using the photothermal deflection technique. The thermal properties are determined by comparing the experimental amplitude and phase curves variations versus square root modulation frequency of the photothermal signal to the corresponding theoretical ones. The best theoretical fitting curves are obtained for well-defined values of thermal conductivity and thermal diffusivity. The optical absorption spectrum is obtained by comparing the experimental normalized amplitude of the photothermal signal curves variations versus the wavelength to the corresponding theoretical curves variations versus the optical absorption coefficient. We have determined the energy gap by using the Tock law. From a measure of the sample's resistance, one can deduce the electrical resistivity which may be correlated to the thermal conductivity. © (2010) Trans Tech Publications.


Gaied I.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein | Gassoumi A.,ENIT BP 37 | Kanzari M.,ENIT BP 37 | Yacoubi N.,Institute Preparatoire Aux Etudes Dingenieur Of Nabeul Ipein
Journal of Physics: Conference Series | Year: 2010

The thermo-physical properties of sulfosalt SnSb2S4 thin films deposited at two different glass substrate temperatures by Thermal Evaporation were investigated using the Photothermal Deflection method in its uniform heating case instead of traditionally a non uniform heating one. The advantage of applying this method in this way lies in its simplicity and its sensitivity to both thermal conductivity and thermal diffusivity. These films undergo abrupt changes in thermal properties on both sides of the transition temperature of 140°C which may be show the influence of the substrate temperature on thermal properties of the material. © 2010 IOP Publishing Ltd.

Loading ENIT BP 37 collaborators
Loading ENIT BP 37 collaborators