Optical spectroscopy, optical conductivity, dielectric properties and new methods for determining the gap states of CuSe thin films

Sakr, G.B.; Yahia, I.S.; Fadel, M.; Fouad, S.S.; Romčević, N.

doi:10.1016/j.jallcom.2010.08.022

Cited by 161 publications

(51 citation statements)

References 38 publications

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“…It is observed that the refractive index of the MDMO-PPV polymer decreases with increasing wavelength and the refractive index can be changed with various solvents. The refractive index values of the MDMO-PPV are close to n values in the literature [41,43,44,54,[59][60][61].…”

Section: The Effects On Optical Parameters Of the Mdmo-ppv Polymer Ofsupporting

confidence: 84%

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Gündüz

2015

Polym. Bull.

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The optical properties of the solutions of the MDMO-PPV light-emitting polymer were investigated. The maximum mass extinction coefficient values of the solutions of the MDMO-PPV for 6.640 and 3.014 µM were found to be 20.874 and 42.009 L g −1 cm −1 , respectively. The absorption band edge values of the solutions of the MDMO-PPV shifted from 2.149 to 1.987 eV with increasing molarity. To obtain lower E g values (2.020, 2.057, 2.083, 2.088 and 2.103 eV, respectively) of the MDMO-PPV can be preferred xylene, toluene, chlorobenzene, chloroform and tetrahydrofuran solvents, respectively. The E g of the solution of the MDMO-PPV was decreased with molarities and solvents. The refractive index values of the MDMO-PPV were controlled with various solvents. The optical parameters such as single oscillator energy, dispersion energy, M −1 , M −3 moments, optical oscillator strengths, linear static refractive index, optical linear susceptibility, third-order nonlinear susceptibility and nonlinear refractive index were calculated using Wemple-DiDomenico equation. The highest contrast was obtained with xylene, while the lowest contrast was obtained with chlorobenzene. The MDMO-PPV can be used in the fabrication of the metal-semiconductor contacts due to low optical band gap and suitable optical parameters. Also, the surface morphology properties of the MDMO-PPV polymer film were investigated.

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Section: The Effects On Optical Parameters Of the Mdmo-ppv Polymer Ofsupporting

confidence: 84%

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Gündüz

2015

Polym. Bull.

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“…The spectral dependence of the refractive index was analyzed using the single effective oscillator model proposed by Wemple and DiDomenico [30], according to which…”

Section: Vs (H ) Is Shown Inmentioning

confidence: 99%

Optical properties of amorphous CuS thin films deposited chemically at different pH values

Güneri

Kariper

2012

Journal of Alloys and Compounds

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“…Chalcogenide glasses are important materials due to their potential use in integrated optics, optical imaging, optical data storage, and infrared optics [13]. They are attracting an extensive attention due to their practical and potential uses in the civil, medical and military areas, especially in the elds of infrared optics, opto-electronics, photonics, ber optics, and novel memory devices [4]. High attention has been paid to the inuence of impurities on the structural and optical properties of chalcogenide glasses and this inuence can be quite dierent for dierent impurities.…”

Section: Introductionmentioning

confidence: 99%

Validity of Swanepoel's Method for Calculating the Optical Constants of Thick Films

2012

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Optical constants, dispersion and oscillator parameters of dierent thicknesses of amorphous Ge25Cd5Se70 lms have been deposited onto glass substrates using thermal evaporation technique. The optical constants have been investigated by optical spectrophotometry measurements. The straight forward analysis proposed by Swanepoel, which is based on the use of the extremes of the interference fringes has been used in order to derive the refractive index and the lm thickness in µm range. The refractive index could be extrapolated by the Cauchy dispersion relationship over the whole spectral range, which extended from 400 to 2500 nm. It is observed that, refractive index n increases with the lm thickness. The possible optical transition is found to be allowed indirect transition with energy gap increase from 1.915 to 1.975 eV with increasing lm thickness. The dispersion of the refractive index is discussed in terms of the WempleDiDomenico single oscillator model. The interband oscillator wavelength, the average oscillator strength, and the optical conductivity were estimated for dierent thicknesses of amorphous Ge25Cd5Se70 lms.

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Optical spectroscopy, optical conductivity, dielectric properties and new methods for determining the gap states of CuSe thin films

Cited by 161 publications

References 38 publications

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Optical properties of poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] light-emitting polymer solutions: effects of molarities and solvents

Optical properties of amorphous CuS thin films deposited chemically at different pH values

Validity of Swanepoel's Method for Calculating the Optical Constants of Thick Films

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