scholarly journals Optical properties of PZN-PT nanoparticles thin layer on ITO glass for photovoltaic application

2019 ◽  
Vol 4 (1) ◽  
Author(s):  
R. Ndioukane ◽  
D. Kobor ◽  
L. Motte ◽  
J. Solard
Keyword(s):  
Optical Properties ◽  
Spin Coating ◽  
Pt Nanoparticles ◽  
Undoped Sample ◽  
Optical And Electrical Properties ◽  
Sem Images ◽  
Photovoltaic Application ◽  
Ito Glass ◽  
Uv Visible ◽  
Mn Doped

In this work, undoped and Mn doped Pb(Zn1/3Nb2/3)O3-4.5PbTiO3 nanoparticles were dispersed in biopolymer and in mixed biopolymer + pentacene as active layer and deposited by spin coating on ITO glasses. Morphological, optical and electrical properties of these layers were investigated. SEM images show the superposition of different deposited layers ITO/TiO2/PZN-PT-np-biopolymer on glass substrate with thicknesses of 1.600 μm, 1.505 μm and 1.765 μm respectively. The absorbance value in UV visible for pentacene layer increases from 75 % to 99 % while the transmittance for ITO glasses diminishes from more than 80 % to 2 %. Optical gaps of ITO, TiO2, PZN-PT nanoparticles are respectively 3.75 eV, 3.2 eV and 3.15 eV. Pentacene deposition reduced the gap to 1.65 eV for undoped sample and 1.60 eV for the doped ones. Intermediate gaps (2.3 eV and 2.6 eV for undoped sample and 2.15 eV and 2.7 eV for doped sample) were observed. Photoluminescence performed between 450 nm and 750 nm confirms « these intermediate gaps ».

scholarly journals Filler Dependent Microstructural and Optical Properties of PVDF/PEG Blends Versus PVDF/GO Nanocomposites

2021 ◽  
Author(s):  
Maheswar Panda
Keyword(s):  
Optical Properties ◽  
Polymer Nanocomposites ◽  
Spin Coating ◽  
Polyvinylidene Fluoride ◽  
Optical Constants ◽  
Structural Features ◽  
Visible Range ◽  
Solution Casting ◽  
Uv Visible ◽  
Optical Applications

Abstract The micro-structural features and the optical properties of polymer blends (PB) of polyvinylidene fluoride (PVDF) base with polyethylene glycol (PEG) and polymer nanocomposites (PNC) of PVDF base with graphene oxide (GO) as fillers are compared. Different weight fractions of PVDF/PEG and PVDF/GO samples were prepared through solution casting followed by spin coating. The microstructure of PVDF/PEG and PVDF/GO shows formation of immiscible/compatible/ homogenous microstructures over different extents of loading of the filler components. UV-Visible spectrometry revealed an increase in absorbance with the amount of filler and the absorbance was found to be lesser and highly dispersive for the PB as compared to PNC, attributed to the heterogeneity/electrical conductivity of the respective fillers of the two systems. Spectroscopic ellipsometry was used to study the various optical constants (e.g. refractive index, extinction co-efficient, etc.) & their dispersion behavior over the visible range of wavelengths. The parameters show large variation as a function of component fillers due to the different extent of interaction of matrix/filler. The optimized parameters were obtained for the 20% PB & the 5% PNC samples respectively, suggesting PNC with nano fillers are always to be a better choice for developing them as materials suitable for various optical applications.

Structural and Photocatalytic Properties of Fe-Dope TiO2 Nanostructure Using the Hydrothermal Treatment Method

2013 ◽  
Vol 634-638 ◽  
pp. 2261-2263
Author(s):  
Khun Ngern Supunnee ◽  
Vatcharinkorn Mekla ◽  
Eakkarach Raksasri
Keyword(s):  
Optical Properties ◽  
Hydrothermal Treatment ◽  
Treatment Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Cuo Nanostructure ◽  
Uv Visible ◽  
Xrd Patterns ◽  
Top View

In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

Physical Properties of MEH-PPV Thin Films at Different Ageing

2015 ◽  
Vol 1109 ◽  
pp. 534-538
Author(s):  
Najwa Ezira Ahmed Azhar ◽  
A.K.S. Shafura ◽  
Irma Hidayanti Halim Affendi ◽  
Shafinaz Sobihana Shariffudin ◽  
Mohamad Rusop
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Spin Coating ◽  
Ageing Time ◽  
Toluene Solution ◽  
Band Gaps ◽  
Phenylene Vinylene ◽  
Electrical And Optical Properties ◽  
Uv Visible ◽  
Atom Force Microscope

Poly (2-methoxy-5(2’-ethylhexyloxy)-phenylene vinylene) (MEH-PPV) thin films were deposited by spin-coating technique. The MEH-PPV powders were dissolved in toluene solution. In this study, we report the effect of ageing on electrical and optical properties MEH-PPV thin films. The thickness of MEH-PPV increased as ageing time increased. The electrical properties were obtained using 2-point probe. The resistivity of thin films decreased as ageing time increased and vice versa with conductivity. The optical properties were investigated using UV-Visible-NIR (UV-VIS-NIR) and atom force microscope (AFM). From UV-Vis result shows the lower band gaps of films in toluene solution proved MEH-PPV has longer conjugation segments. The surface roughness of thin films decreased with the increased of ageing time; which is caused by the aggregation of the MEH-PPV. The PL spectra show the quenching of emission might be due to the conjugation of length polymer changes in different ageing times.

scholarly journals The structure and optical properties of organic semiconductor bulk hetrojunction blend (NiPcTs/Alq3) thin films

2019 ◽  
Vol 15 (33) ◽  
pp. 40-48
Author(s):  
Atyaf H. Kadhum
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Optical Properties ◽  
Spin Coating ◽  
Annealing Temperature ◽  
Bulk Heterojunction ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Visible ◽  
Xrd Patterns

The effect of heat treatment on the optical properties of the bulk heterojunction blend nickel (II) phthalocyanine tetrasulfonic acid tetrasodium salt and Tris (8-hydroxyquinolinato) Aluminum (NiPcTs/Alq3) thin films which prepared by spin coating was described in this study. The films coated on a glass substrate with speed of 1500 rpm for 1.5 min and treated with different annealing temperature (373, 423 and 473) K. The samples characterized using UV-Vis, X ray diffraction and Fourier transform Infrared (FTIR) spectra, XRD patterns indicated the presence of amorphous and polycrystalline blend (NiPcTs/Alq3). The results of UV visible shows that the band gap increase with increasing the annealing temperature up to 373 K and decreases with increase the annealing temperature to (423, 473)K respectively.

The Optical and Electrical Properties of Polymer Poly (3-Hexylthiophene) P3HT by Heat Treatment

2015 ◽  
Vol 1109 ◽  
pp. 419-423
Author(s):  
C.H. Rosmani ◽  
A.Z. Zainurul ◽  
M. Rusop ◽  
S. Abdullah
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Heat Treatment ◽  
Optical Properties ◽  
Electrical Properties ◽  
Spin Coating ◽  
Effect Of Temperature ◽  
Optical And Electrical Properties ◽  
Optical Absorption Spectra ◽  
Coating Method

The polymer of poly (3-hexylthiophene) was active layer in application such as solar cells. In this paper, P3HT has been chosed to know the effect of temperature onto P3HT. The optical properties of P3HT were measured by using photoluminescence spectroscopy (PL) and UV-Vis measurement. The polymer of P3HT has been spin coated on the glass by using spin-coating method for thin films produced. The temperature was measured start at 60°C to 180 o C. From PL result the peak was exist at range 500-600 nm and started moved to left side when temperature increase. The UV-Vis result showed at range 400-500 nm towards to blue shifted. After heat treatment, the optical absorption spectra for the thin film of P3HT on the glass showed a distinct red-shifted with developing vibronic features of P3HT and the quenched photoluminescence (PL) spectrum was considerably restored .Keywords: P3HT; temperature; Uv-Vis; photoluminescence; PL; I-V

scholarly journals Effect of Annealing Temperature and Spin Coating Speed on Mn-Doped ZnS Nanocrystals Thin Film by Spin Coating

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Noor Azie Azura Mohd Arif ◽  
Chong Chee Jiun ◽  
Sahbudin Shaari
Keyword(s):  
Thin Film ◽  
Spin Coating ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Compositional Analysis ◽  
Coating Method ◽  
Uv Visible ◽  
Metal Tape ◽  
Mn Doped ◽  
Structural Characterizations

ZnS:Mn nanocrystals thin film was fabricated at 300°C and 500°C via the spin coating method. Its sol-gel was spin coated for 20 s at 3000 rpm and 4000 rpm with metal tape being used to mold the shape of the thin film. A different combination of these parameters was used to investigate their influences on the fabrication of the film. Optical and structural characterizations have been performed. Optical characterization was analyzed using UV-visible spectroscopy and photoluminescence spectrophotometer while the structural and compositional analysis of films was measured via field emission scanning electron microscopy and energy dispersive X-ray. From UV-vis spectra, the wavelength of the ZnS:Mn was 250 nm and the band gap was within the range 4.43 eV–4.60 eV. In room temperature PL spectra, there were two emission peaks centered at 460 nm and 590 nm. Under higher annealing temperature and higher speed used in spin coating, an increase of 0.05 eV was observed. It was concluded that the spin coating process is able to synthesize high quality spherical ZnS:Mn nanocrystals. This conventional process can replace other high technology methods due to its synthesis cost.

Structural and Photocatalytic Properties of CuO Nanorods Using the Hydrothermal Treatment Method

2013 ◽  
Vol 634-638 ◽  
pp. 2258-2260
Author(s):  
Sopa Noontasa ◽  
Vatcharinkorn Mekla ◽  
Sert Kiennork
Keyword(s):  
Optical Properties ◽  
Hydrothermal Treatment ◽  
Treatment Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Cuo Nanostructure ◽  
Uv Visible ◽  
Xrd Patterns ◽  
Top View

In this work optical properties of CuO nanostructure were studied. CuO nanostructure were synthesized by the hydrothermal treatment method. The structural and chemical natures of the obtained materials were studied using powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and study optical properties by UV-visible spectral. The XRD patterns of the CuO nanostructures indicated that CuO phases (JCPDS 05- 0661). The top-view SEM images, it can be seen clearly that high-density, horizontally scattered nanorod were grown on the product prepared at concentration of NaOH (aq) 7.5 M at 180 C for 12 h. The spectral of UV-vis data recorded showed the strong cut off at 341 nm.

Effect of Different Solvents on the Optical Properties and Surface Morphology of MEH-PPV Thin Films

2013 ◽  
Vol 667 ◽  
pp. 402-406 ◽  
Author(s):  
N.Y. Zayana ◽  
Mohamad Rusop
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Surface Morphology ◽  
Spin Coating ◽  
Smooth Surface ◽  
Red Shift ◽  
Phenylene Vinylene ◽  
Sem Images ◽  
Aromatic Solvents ◽  
Peak Assignment

Thin films of poly [2-methoxy-5(2’-ethyl hexyloxy)-phenylene vinylene] (MEH-PPV) prepared from aromatic and non-aromatic solvents were obtained by spin coating techniques. The non-aromatic solvents used are chloroform and tetrahydrofuran (THF), while the aromatic solvents used are toluene and xylene. The UV-Vis and PL spectra of MEH-PPV thin films prepared from toluene and xylene slightly red shift compared to thin films from chloroform and THF. The shifting due to the aggregation formed in thin films. The SEM images of thin films prepared from aromatic solvents shows smooth surface while surface of thin films from non-aromatic is rough. The FTIR spectra of all samples show the same peak assignment of MEH-PPV.

Development of Molybdenum trioxide (MoO3) by spin coating method for photovoltaic application

2012 ◽  
pp. 1805-1808 ◽  
Author(s):  
L. Chibane ◽  
M.S. Belkaid ◽  
M. Pasquinelli ◽  
H. Derbal-Habak ◽  
J.J. Simon ◽  
...  
Keyword(s):  
Spin Coating ◽  
Molybdenum Trioxide ◽  
Spin Coating Method ◽  
Photovoltaic Application ◽  
Coating Method
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