scholarly journals Optical and Thermal Properties of In2S3

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Faycel Saadallah ◽  
Neila Jebbari ◽  
Najoua Kammoun ◽  
Noureddine Yacoubi
Keyword(s):  
Thermal Conductivity ◽  
Optical Properties ◽  
Thermal Properties ◽  
Thermal Annealing ◽  
Crystalline Structure ◽  
Gap Energy ◽  
Photothermal Deflection Spectroscopy ◽  
Photothermal Deflection

Photothermal deflection spectroscopy (PDS) is carried out in order to investigate thermal and optical properties of Al doped In2S3. The influence of thermal annealing on its gap energy as well as its thermal properties is revealed. In this way, we notice that thermal conductivity is increased and the gap energy is reduced. These features are probably due to the improvement of the crystalline structure of the sample.

scholarly journals Photothermal Deflection Spectroscopy Study of Nanocrystalline Si (nc-Si) Thin Films Deposited on Porous Aluminum with PECVD

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
S. Ktifa ◽  
M. Ghrib ◽  
F. Saadallah ◽  
H. Ezzaouia ◽  
N. Yacoubi
Keyword(s):  
Optical Properties ◽  
Energy Gap ◽  
Chemical Vapor ◽  
Nanocrystalline Silicon ◽  
Porous Aluminum ◽  
Force Microscopy ◽  
Photothermal Deflection Spectroscopy ◽  
Atomic Force ◽  
Photothermal Deflection ◽  
Morphology Characterization

We have studied the optical properties of nanocrystalline silicon (nc-Si) film deposited by plasma enhancement chemical vapor deposition (PECVD) on porous aluminum structure using, respectively, the Photothermal Deflection Spectroscopy (PDS) and Photoluminescence (PL). The aim of this work is to investigate the influence of anodisation current on the optical properties of the porous aluminum silicon layers (PASL). The morphology characterization studied by atomic force microscopy (AFM) technique has shown that the grain size of (nc-Si) increases with the anodisation current. However, a band gap shift of the energy gap was observed.

Electronic and Optical Properties of a-Si1−xCx:H Films Produced From Admixtures of Silane and Ditertiarybutylsilane

1994 ◽  
Vol 336 ◽  
Author(s):  
K. Gaughan ◽  
J.M. Viner ◽  
P.C. Taylor
Keyword(s):  
Electrical Conductivity ◽  
Silicon Carbide ◽  
Optical Properties ◽  
Chemical Vapor Deposition ◽  
Amorphous Silicon ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Photothermal Deflection Spectroscopy ◽  
Optical And Electronic Properties ◽  
Photothermal Deflection

ABSTRACTWe investigated the optical and electronic properties of amorphous silicon carbide (a-Si1−xCx:H) films produced by plasma enhanced chemical vapor deposition from admixtures of silane and ditertiarybutylsilane [SiH2 (C4H9) 2 or DTBS] using photothermal deflection spectroscopy, electrical conductivity and its temperature dependence as well as photoconductivity. These a-Si1−xCx:H films exhibit low Urbach energies and high photoconductivities similar to films produced with other carbon feedstock sources. We also present our results for hydrogen diluted a-Si1−xCx:H films using DTBS as the carbon feedstock source.

Optical properties of Microcrystalline Silicon determined by Spectroscopic Ellipsometry and Photothermal Deflection Spectroscopy

2002 ◽  
Vol 715 ◽  
Author(s):  
Kyung Hoon Jun ◽  
Helmut Stiebig ◽  
Reinhard Carius
Keyword(s):  
Optical Properties ◽  
Spectroscopic Ellipsometry ◽  
Volume Fraction ◽  
Large Deviation ◽  
Effective Medium Theory ◽  
Dense Medium ◽  
Medium Theory ◽  
Enhanced Absorption ◽  
Photothermal Deflection Spectroscopy ◽  
Photothermal Deflection

AbstractThe effect of the microstructure and bonded hydrogen on the optical properties of microcrystalline films (μc-Si:H) was investigated by Spectroscopic Ellipsometry (SE) and Photothermal Deflection Spectroscopy (PDS). On samples with a high crystalline volume fraction we studied the reason for a large deviation of absorption coefficient in the energy range between 1.6 eV and 3.2 eV from the value predicted by effective medium theory. This enhancement can be attributed to scattering by the inhomogeneity of μc-Si:H, which is investigated by the introduction of the dense medium radiative transfer formalism to an optical scattering simulation. Further, we suggest strain as a reason for the enhanced absorption in highly crystalline μc-Si:H.

scholarly journals Improvement of the Thermal Properties of Sorel Cements

2020 ◽  
Author(s):  
Rim Zgueb ◽  
Amal Brichni ◽  
Noureddine Yacoubi
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
Thermal Properties ◽  
Thermal Diffusivity ◽  
Thermal Insulation ◽  
Building Material ◽  
Polyvinyl Acetate ◽  
Cement Matrix ◽  
Photothermal Deflection

Sorel cements is a promising building material for insulation applications. Indeed, the effect of polyvinyl acetate polymer on cements has been investigated. The polyvinyl acetate polymer was added to the cement matrix with a percentage of 0, 5, 10, 15 and 20% by weight of Sorel cement. The thermal properties of Sorel cement were determined by photothermal deflection technique. Thermal properties such as thermal conductivity and thermal diffusivity are measured by coincidentally the experimental curves of the photothermal signal with the best corresponding theoretical curves. The results revealed that the incorporation of polyvinyl acetate polymer enhance the thermal insulation and reduce the compressive strength of Sorel cement.

Optical Degradation of Poly(P-PHENYLENE VINYLENE)

1995 ◽  
Vol 413 ◽  
Author(s):  
S. K. So ◽  
M. H. Chan ◽  
C. S. Hon ◽  
Louis M. Leung
Keyword(s):  
Optical Properties ◽  
Infrared Spectroscopy ◽  
Double Bond ◽  
Laser Irradiation ◽  
Phenylene Vinylene ◽  
Conjugation Length ◽  
Photo Oxidation ◽  
Photothermal Deflection Spectroscopy ◽  
Optical Irradiation ◽  
Photothermal Deflection

ABSTRACTThe influence of laser irradiation on an electroluminescent polymer, poly(2,5-di-n-hexyloxy-l,4- phenylene vinylene) is studied. Photoluminescence, infrared spectroscopy, and photothermal deflection spectroscopy were used to identify changes in the optical properties of the polymer after laser irradiation. It is found that optical irradiation leads to the opening of the vinyl double bond and decrease in conjugation length. Photo-oxidation of the polymer is believed to be responsible for the optical degradation of the polymer.

Optical properties of TiO2 thin films estimated by photothermal deflection spectroscopy

2003 ◽  
Vol 74 (1) ◽  
pp. 863-865 ◽  
Author(s):  
S. Ogawa ◽  
K. Mori ◽  
H. Natsuhara ◽  
T. Ohashi ◽  
R. Sakakiyama ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Tio2 Thin Films ◽  
Photothermal Deflection Spectroscopy ◽  
Photothermal Deflection

Optical properties of CdTe thin films studied by photothermal deflection spectroscopy

1983 ◽  
Vol 102 (3) ◽  
pp. 259-263 ◽  
Author(s):  
J.G. Mendoza-Alvarez ◽  
B.S.H. Royce ◽  
F. Sánchez-Sinencio ◽  
O. Zelaya-Angel ◽  
C. Menezes ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Photothermal Deflection Spectroscopy ◽  
Cdte Thin Films ◽  
Photothermal Deflection
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