Modeling optical energy gap of strontium titanate multifunctional semiconductor using stepwise regression and genetic algorithm based support vector regression

The effect of the volumetric ratio of the tris(8-hydroxyquinoline) aluminum (Alq3) on its blend with the N,N'-Di [(1-naphthyl)-N,N'-diphenyl]-(1,1'-biphenyl)-4,4'-diamine (NPD) (Alq3:NPD) is investigated and optimized for the UV photodetectors fabrication. The optical and structural properties of Alq3:NPD blend with different volumetric ratios 1:1, 2:1, and 3:1 is studied in the context of the absorbance, transmittance, optical energy gap and XRD patterns. Results show that the absorbance is increased by 11% at A = 260 nm with the increase in the volumetric ratio. In contrast, the optical energy bandgap that is extrapolated from the Tauc’s plot is decreased with the increase in the volumetric ratio, and the 2:1 ratio shows the lowest energy in the UV region. In terms of the XRD investigation, the 2:1 volumetric ratio shows the highest intensity for the crystallinity peak at 36.6°. The fabricated photodetector with a different volumetric ratio of the active layer Alq3:NPD blend shows the best performance with the ratio 2:1.

Download Full-text

Forecasting of freight volume based on support vector regression optimized by genetic algorithm

2009 2nd IEEE International Conference on Computer Science and Information Technology ◽

10.1109/iccsit.2009.5234798 ◽

2009 ◽

Cited By ~ 1

Author(s):

Yan Gao

Keyword(s):

Genetic Algorithm ◽

Support Vector Regression ◽

Support Vector ◽

Freight Volume

Download Full-text

Comment on “optical energy gap of thick amorphous selenium film”

Journal of Non-Crystalline Solids ◽

10.1016/0022-3093(84)90133-9 ◽

1984 ◽

Vol 69 (1) ◽

pp. 167-168 ◽

Cited By ~ 16

Author(s):

S.K.J Al-Ani ◽

C.A Hogarth

Keyword(s):

Energy Gap ◽

Amorphous Selenium ◽

Optical Energy Gap ◽

Optical Energy ◽

Selenium Film

Download Full-text

A Study of the Structural and Optical Properties of SnS:F prepared by chemical spray pyrolysis technique

Baghdad Science Journal ◽

10.21123/bsj.11.2.518-526 ◽

2014 ◽

Vol 11 (2) ◽

pp. 518-526

Author(s):

Baghdad Science Journal

Keyword(s):

Optical Properties ◽

Spray Pyrolysis ◽

Energy Gap ◽

Spray Pyrolysis Technique ◽

Chemical Spray Pyrolysis ◽

Structural And Optical Properties ◽

Optical Energy Gap ◽

Optical Energy ◽

Chemical Spray Pyrolysis Technique ◽

Chemical Spray

Thin films of pure tin mono-sulfide SnS and tin mono-sulfide for (1,2,3,4)% fluorine SnS:F with Thicknesses of (0.85 ±0.05) ?m and (0.45±0.05) ?m respectively were prepared by chemical spray pyrolysis technique. the effect of doping of F on structural and optical properties has been studied. X-Ray diffraction analysis showed that the prepared films were polycrystalline with orthorhombic structure. It was found that doping increased the intensity of diffraction peaks. Optical properties of all samples were studied by recording the absorption and transmission spectrum in range of wave lengths (300-900) nm. The optical energy gap for direct forbidden transition and indirect allowed transition were evaluated It is found that for doping less than 2% the optical energy gap increases as the percentage of doping increases in the samples while for doping more than 2% the values of the optical energy gap decreases as the percentage of doping increases.

Download Full-text

Effect of Pb percentage on optical parameters of PbxCd1-xSe thin films

Iraqi Journal of Physics (IJP) ◽

10.30723/ijp.v14i29.214 ◽

2019 ◽

Vol 14 (29) ◽

pp. 1-7

Author(s):

Farah Q. Kamil

Keyword(s):

Thin Films ◽

Thermal Evaporation ◽

Energy Gap ◽

Optical Measurements ◽

Optical Parameters ◽

Optical Energy Gap ◽

Optical Energy ◽

Glass Substrates

PbxCd1-xSe compound with different Pb percentage (i.e. X=0,0.025, 0.050, 0.075, and 0.1) were prepared successfully. Thin filmswere deposited by thermal evaporation on glass substrates at filmthickness (126) nm. The optical measurements indicated thatPbxCd1-xSe films have direct optical energy gap. The value of theenergy gap decreases with the increase of Pb content from 1.78 eV to1.49 eV.

Download Full-text