The Effects of Additive TiO2 Nanoparticles on the Energy Gap of DCM Doped with PS Thin Films

In this work thin films containing laser dye (DCM) doped with polystyrene (PS) were prepared using casting method. Titania (TiO2) nanoparticles also were synthesized using sol gel technique. Characteristics of the tetania were done using XRD patter, and the characteristic peak of anatase is sharper and clear to observe, in particular at 25.40° degree. While scanning electron microscopy (SEM) was used to achieve the morphology of TiO2samples, and to determine the sizes of nanoparticles. Different titania nanoparticle densities (0.882×1020, 1.765×1020, 2.648×1020, 3.530×1020and 4.413×1020cm-3) were co-doping with dye doped polymer and study the effect of this addition on the optical properties and electronic transition energy gaps in cases of both direct and indirect transitions.

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Effects of (Sm, Mn and Ni) co-doping on structural, optical and magnetic properties of BiFeO3 thin films fabricated by a sol-gel technique

Materials Letters ◽

10.1016/j.matlet.2016.02.004 ◽

2016 ◽

Vol 170 ◽

pp. 85-88 ◽

Cited By ~ 27

Author(s):

Lu Yu ◽

Hongmei Deng ◽

Wenliang Zhou ◽

Qiao Zhang ◽

Pingxiong Yang ◽

...

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Sol Gel ◽

Co Doping ◽

Bifeo3 Thin Films ◽

Gel Technique ◽

Optical And Magnetic Properties

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"The Effects of Additive TiO2 Nanoparticles on the Optical properties of DCM Doped with PVC Thin Films "

Muthanna Journal of Pure Science ◽

10.52113/2/05.01.2018/27-35 ◽

2018 ◽

Vol 5 (1) ◽

pp. 27-35

Author(s):

Shymaa K. Hussian ◽

Thill A. Kadhum Al-musaw ◽

Shatha Raheem Helal Al himidi

Keyword(s):

Thin Films ◽

Optical Properties ◽

Tio2 Nanoparticles ◽

Electronic Transition ◽

Transition Energy ◽

Energy Gap ◽

Sol Gel ◽

Titania Nanoparticles ◽

Absorption Region ◽

Electronic Transition Energy

"In this work thin films containing laser dye (DCM) doped with (PVC) were prepared using casting method. Titania (TiO2) nanoparticles also were synthesized using sol-gel technique. Different titania nanoparticle densities (0.882×1020, 1.765×1020, 2.648×1020 and 3.530×1020 cm-3) were co-doping with dye doped polymer to study the effect of this addition on the optical properties and electronic transition energy gaps in cases of both direct and indirect transitions, Absorbance spectra were measured using Spectrophotometer. Absorption and extinction coefficients as well as the refractive indices have been obtained the spectra of absorbance at the strong absorption region. It was observed from results that the allowed direct electronic transitions energy gap was decreasing from 2.22 to 2.175e.V with the increasing of titania nanoparticles density and the allowed indirect electronic transition energy gap decreasing from 2.19 to 2.13e.V.

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Optical Study on Deposed Polystyrene Doped DCM Laser Dye Thin Films at Different Temperature

International Letters of Chemistry Physics and Astronomy ◽

10.18052/www.scipress.com/ilcpa.68.39 ◽

2016 ◽

Vol 68 ◽

pp. 39-47

Author(s):

Akeel Shaker Tuhaiwer

Keyword(s):

Thin Films ◽

Transition Energy ◽

Energy Gap ◽

Electronic Transitions ◽

Effect Of Temperature ◽

Optical Study ◽

Laser Dye ◽

Casting Method ◽

Annealing Temperatures ◽

Electronic Transition Energy

Polystyrene (PS) polymer doped with DCM laser dye thin films have prepared on glass substrate using casting method. The obtained PS doped with DCM thin films were treated at different annealing temperatures such (30, 40, 50, 60, 70) °C. It was observed from result that the allowed direct electronic transitions energy gap was increased from 2.21 up to 2.3e.V as the temperature increasing from 30-70°C. And the allowed indirect electronic transition energy gap rose from 0.06 to 0.15e.V as the temperature increasing. The allowed indirect phonon energy also was decreased at the same range of temperature. The different effect of temperature variation was observed on the optical properties of PS doped with DCM thin films.

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"Synthesis and Optical Properties of Polystyrene Doped with DCM Thin Films "

Muthanna Journal of Pure Science ◽

10.52113/2/05.01.2018/8-18 ◽

2018 ◽

Vol 5 (1) ◽

pp. 8-18

Author(s):

Akeel Shaker Tuhaiwer

Keyword(s):

Thin Films ◽

Optical Properties ◽

Transition Energy ◽

Energy Gap ◽

Electronic Transitions ◽

Effect Of Temperature ◽

Casting Method ◽

Double Beam ◽

Urbach’S Energy ◽

Electronic Transition Energy

"In the present work Polystyrene (PS) polymer doped with DCM laser dye thin films have been prepared on glass substrate using casting method. The final samples of PS doped with DCM thin films were treated with different annealing temperatures at (30, 40, 50, 60) oC. Optical absorption and transmission spectra of the prepared thin films were recorded using UV-VIS double beam spectrometer in the wavelength range from 190 to 1100 nm. The results shown that the allowed direct electronic transitions energy gap increased from 2.08 up to 2.25e.V as the temperature increasing from 30 to 60oC, whereas the allowed indirect electronic transition energy gap increase from 2.02 up to 2.17 eV as the temperature increase from 30 to 60oC. The effect of temperature on the optical properties such as Urbach’s energy, Refractive index, Extinction coefficient, Critical angle, Brewster angle, and Finesse coefficient of PS doped with DCM thin films also studied in this work.

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Effects of Sm and Mn Co-Doping on Structural and Optical Properties of BiFeO3 Thin Films Prepared by Sol-Gel Technique

Materials Science Forum ◽

10.4028/www.scientific.net/msf.815.149 ◽

2015 ◽

Vol 815 ◽

pp. 149-153 ◽

Cited By ~ 2

Author(s):

Wen Liang Zhou ◽

Hong Mei Deng ◽

Jun He ◽

Jian Liu ◽

Hui Yi Cao ◽

...

Keyword(s):

Thin Films ◽

Sol Gel ◽

Blue Shift ◽

X Ray Diffraction ◽

Co Doping ◽

Average Grain Size ◽

Gel Technique ◽

Diffraction Patterns ◽

Quartz Substrates ◽

Rhombohedral Perovskite Structure

(Bi1-xSmx)(Fe0.95Mn0.05)O3(x=0.00, 0.03 and 0.06) thin films were deposited on the quartz substrates by sol-gel technique. The results of X-ray diffraction patterns indicated all thin films had rhombohedral perovskite structure. Moreover, the Sm and Mn co-doping at A-and B-site of BiFeO3resulted in the structural distortion. Scanning electron microscope measurements exhibited that the uniform surface morphology could be obtained by co-doping and the average grain size of the films decreased with increasing Sm content. Furthermore, the fundamental absorption edges ofxBSFMO films showed a blue shift with the increase of Sm content which can be observed in transmittance spectra. The optical band gap of the thin films forx= 0.00, 0.03 and 0.06 can be expressed by (0.84x+2.62) eV, which is due to the Burstein-Moss effect.

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