Search

Poly(methyl methacrylate) (PMMA) doped with different weight percent of methyl violet-6B (MV-6B) as polymeric films were prepared by a casting method. Different concentrations of MV-6B can affect both the crystal structure and optical properties of PMMA. The broad hump diffraction peaks present in PMMA at 2θ  = 15.27°, 30.60°, and 40.69° are ascribed to amorphous PMMA. During the incorporation of MV-6B dye onto PMMA, the intense peaks of PMMA at the 2θ value of 15.27° and 30.6° became less intense, and d -spacing was changed. The X-ray results confirmed the strong electrostatic interaction of the cationic MV-6B dye with the anionic PMMA polymer. Furthermore, the transmittance of PMMA/MV-6B composites is decreased with the increase of MV-6B dopants concentrations onto the PMMA matrix; this may be attributed to the electrostatic interaction between the PMMA chains and the molecules of methyl violet-6B. MV-6B-doped PMMA possesses three distinct band gaps corresponding to the pure PMMA, and other two band gaps are for the MV-6B /PMMA composite films. PMMA/MV films with 3.333 wt% of MV-6B) showed a large scale CUT-OFF laser filter inside in the range from 190 to 670 nm. Our designed filter is a unique polymeric composite film for optoelectronic and laser applications. [ABSTRACT FROM AUTHOR]

Pyronin Y dye (PY) is a kind of xanthene derivatives. Thin films of pyronin Y were deposited onto highly cleaned glass substrates using low-cost/spin coating technique. The structure properties of pyronin Y thin films with different thicknesses were investigated by using X-ray diffraction (XRD) and atomic force microscope (AFM). PY thin films for all the studied thicknesses have an amorphous structure supporting the short range order of the grain size. AFM supports the nanostructure with spherical/clusters morphologies of the investigated thin films. The optical constants of pyronin Y thin films for various thicknesses were studied by using UV–vis–NIR spectrophotometer in the wavelength range 350–2500 nm. The transmittance T(λ) , reflectance R(λ) spectral and absorbance ( abs(λ) ) were obtained for all film thicknesses at room temperature and the normal light incident. These films showed a high transmittance in the wide scale wavelengths. For different thicknesses of the studied thin films, the optical band gaps were determined and their values around 2 eV. Real and imaginary dielectric constants, dissipation factor and the nonlinear optical parameters were calculated in the wavelengths to the range 300–2500 nm. The pyronin Y is a new organic semiconductor with a good optical absorption in UV–vis regions and it is suitable for nonlinear optical applications. [ABSTRACT FROM AUTHOR]

Here, we report the doping effect of zinc (Zn) on the physical properties of cadmium oxide (CdO) at various concentrations (1, 2, 3 and 4 wt% of Zn). The studied samples were prepared using sol-gel in addition with sol gel spin coating technique. The structural, optical and dispersive properties were compared with the already reported work in the literature. The structural properties were observed by using atomic force microscopy (AFM). The AFM images show that the grain size decreases with increasing the concentration of Zn. The highest value of average cluster size (78. 71 nm) was found at 1% and the lowest (60.23 nm) when the doping concentration of Zn was 4%. Similar trend was observed in the roughness of the doped thin film when the Zn concentration was increased. The optical properties were examined using Shimadzu UV–Vis–NIR spectrophotometer and we found that the optical band gap of the un-doped CdO and the Zn-doped CdO thin films increases from 2.54 to 2.62 eV as the Zn concentration is increased from 1% to 4%. Also, the optical dispersion parameters ( E o , E d , n 2 ∞ , λ 0 and S o ) were calculated and discussed. We observed that the refractive index dispersion of undoped CdO and the Zn-doped CdO thin films follow the single oscillator model. Finally, spectroscopic method has been exploited to analyze the 3rd order non-linear optical susceptibility χ ( 3 ) and nonlinear refractive index n ( 2 ) . [ABSTRACT FROM AUTHOR]

In the current work, the authors present the systematic study on linear and nonlinear optical properties of Copper-phathalocyanine thin film deposited by thermal evaporation system for the first time. The thickness of the prepared thin film was measured and found to be ~300 nm. X-ray diffraction and AFM study confirms that the prepared thin film possess good quality. The orientation of the grown thin film is found to be along (100). UV–vis-NIR study shows that the deposited thin film is highly transparent (>80%) in the wavelength range of 700–2500 nm. Further, the recorded optical data was used to determine the various linear and nonlinear optical parameters. The calculated value of refractive index is found to be in the range of 0.4–1.0. The direct and indirect band gap value is found to be 2.9 and 3.25 eV, respectively. The value of linear and nonlinear susceptibilities is found to be in order of 10 −12 . The higher value of linear and nonlinear parameters makes it suitable for optoelectronic applications. [ABSTRACT FROM AUTHOR]

Pyronin Y (PY) is an organic dye which is used extensively before in staining RNA and other organo-cells. Nowadays, it can be used in electronic and optoelectronic devices as an organic semiconductor. X-ray diffraction (XRD) showed that PY is a polycrystalline material and both the lattice structure and the lattice constants were calculated for the first time by using crysfire and checkcell software. In addition, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and differential thermal analysis (DTA) have been studied. Diffused reflectance (DR) of pyronin Y in the wavelength 200–2300 nm was measured and analyzed to calculate the optical parameters and the absorption region of pyronin Y. The optical band gap was calculated on the basis of Kubelka–Munk theory (KMT). It is clear that there are three optical band gaps in the studied range of photon energy and equal 2.13, 1.82 and 1.67 eV. The high band gap (2.13 eV) is corresponding to the fundamental band gap (between HOMO and LUMO) and other two gaps (1.82 and 1.67 eV) are corresponding to the trap energy inside the band gap (i.e. onset gaps). On the basis of the DR measurements and applicable of KMT, we are able to calculate the refractive index, absorption index and the dielectric constants for pyronin Y in powder form. Pyronin Y is an organic semiconductor due to the increasing of DC (direct current) electrical conductivity with increasing temperature and the electronic parameters of direct current was calculated. Ac electrical conductivity, dielectric constant and dielectric loss were calculated and interpreted on the basis of ac fields causes the different kind of polarization inside the materials. Hence, pyronin Y can be used as a new materials for advanced technology. [ABSTRACT FROM AUTHOR]

Cadmium doped nickel oxide with different dopants concentrations (0, 1, 5, 10%, 20, 30 and 40%) were deposited on highly cleaned glass substrates using sol–gel/spin coating technique. The effect of cadmium doping on structural, morphologies and optical parameters have been studied in details. The XRD lines of the deposited Cd:NiO was enhanced with increasing cadmium doping content due to the improvement of the films crystallinity. The optical properties and the morphologies study of the deposited nanoparticles thin films have been discussed in this work. It was shown that the average of the crystalline size of the deposited thin films was calculated using Debye–Scherrer formula and found in the range between 15 and ∼10 nm also agreed with the size values which was extracted from SEM images. Optical parameters i.e. absorbance ( A ), transmittance ( T ), refractive index ( n ) were measured and calculated. Band gap energy is considered one of the most important optical parameter, therefore measured and found ranging between 2.95 and 3.30 eV. The real and imaginary part of the dielectric constant and optical conductivity of these deposited thin films were reported. Cd:NiO can be applied in different electronic and optoelectronic applications due to its high band gap and high transparency. [ABSTRACT FROM AUTHOR]

Thin films of CuO nanorods with 300 nm thickness were prepared by using non-vacuum technique, spin coating sol–gel technique. Surface morphology of CuO films were analyzed using atomic force microscopy, AFM. Thin films of CuO have nanorods in its morphology structure. Optical constants, such as refractive ( n ) and absorption ( k ) indices of the prepared film were determined using spectrophotometric measurements. Hole mobility of CuO nanorods was deduced at a certain characterized frequency, for the first time for CuO, using the well known Drude equation. Optical transition type was found to be direct allowed with energy of 2.78 eV. From optical constants analysis for CuO films, the real ( ɛ 1 ) and imaginary ( ɛ 2 ) dielectric constants, optical conductivity and dissipation factor were also studied. Comparison of the obtained results with the available experimental data for previously published ones are also considered. [ABSTRACT FROM AUTHOR]

Structural and optical properties as a function of film thickness have been studied for the thermally evaporated cadmium iodide (CdI 2 ) films. According to XRD structure, the thickness of investigated films extends from 272 to 696 nm, showing hexagonal structure and good c -axis alignment normal to glass substrate plane. Both of crystallite size and lattice strain have been determined in terms of Voight method of the main peak. The optical constants, refractive index ( n ), and extinction coefficient ( k ) have been determined using envelope method. The optical absorption data indicates an allowed direct inter – band transition near the absorption edge with an optical energy gap that decreases continuously from 3.572 to 3.767 eV. Both of optical constants and energy gap show thickness dependence that can be explained in terms of structure parameters, crystallite size, and lattice strain. [ABSTRACT FROM AUTHOR]

Abstract: CdTe thin films of different thicknesses were deposited on polymer substrates for flexible optical devices applications. X-ray diffractogram of different thicknesses for CdTe films are measured and their patterns exhibit polycrystalline nature with a preferential orientation along the (111) plane. The optical constants of CdTe films were calculated based on the measured transmittance spectral data using Swanepoel's method in the wavelength range 400–2500nm. The refractive index n and absorption index k were calculated and the refractive index exhibits a normal dispersion. The refractive index dispersion data followed the Wemple–DiDomenico model based on single oscillator. The oscillator dispersion parameters and the refractive index no. at zero photon energy were determined. The possible optical transition in these films is found to be allowed direct transition with energy gap increase from 1.46 to 1.60eV with the increase in the film thickness. CdTe/flexible substrates are good candidates in optoelectronic devices [Copyright &y& Elsevier]

Highlights: [•] Nano-pentacene thin film was prepared via thermal evaporation. [•] Optical constants and optical dispersion parameters were calculated. [•] The complex dielectric constant and the band gap were determined. [•] The optical conductivity σopt , (VELF) and (SELF) functions were calculated. [•] Pentacene is a good candidate for the organic thin film transistor. [Copyright &y& Elsevier]

Abstract: Glassy system with the composition xLa2O3–30PbO–(70− x)B2O3 with (0≤ x ≤10mol%) has been prepared using the well known melt quenching technique. The transmittance and the reflectance spectra of the glasses have been measured and the optical constants such as: the refractive index, the optical band gap for indirect transition, the optical basicity and the average electronic polarizability have been calculated for the investigated glassy system. A correlation between the optical constants and the elastic moduli was performed. The AC magnetic susceptibility of the investigated glasses was studied above 4.3K. The temperature dependent magnetic susceptibility deviates from the Curie law indicating that weak antiferromagnetic interactions between La ions were present in the studied system. The magnetic entropy change of the glasses was determined. [Copyright &y& Elsevier]

Abstract: The effects of the molar ratio of stabilizer on structural and optical properties of ZnO nanocrystalline films have been investigated. The AFM images indicate that the ZnO films are formed from the nanofibers. The optical transmittance spectrum indicates the average transmittance higher than 85% at higher wavelengths. In UV spectrum, the transmittance increases with followed by a slight decay within visible range. The results of the absorption coefficient were analyzed in order to determine the optical band gap of the films. The optical constants (refractive index and absorption index) of the thin films were determined. Moreover, the dispersion parameters such as dispersion energy, oscillator energy, dielectric constants and dissipation factor were determined. The most significant result of the present study is to indicate that the molar ratios of MEA to ZnAc in the prepared ZnO nanocrystalline films have a little effect on the optical band gap but can be used to modify the optical dispersion parameters of the prepared ZnO nanocrystalline thin films. [Copyright &y& Elsevier]

Abstract: Thin films of ZnGa2Se4 were deposited by thermal evaporation method of pre-synthesized ingot material onto highly cleaned microscopic glass substrates. The chemical composition of the investigated compound thin film form was determined by means of energy-dispersive X-ray spectroscopy. X-ray diffraction XRD analysis revealed that the powder compound is polycrystalline and the as-deposited and the annealed films at T a =623 and 673K have amorphous phase, while that annealed at T a =700K is polycrystalline with a single phase of a defective chalcopyrite structure similar to that of the synthesized material. The unit-cell lattice parameters were determined and compared with the reported data. Also, the crystallite size L, the dislocation density δ and the main internal strain ε were calculated. Analyses of the AFM images confirm the nanostructure of the prepared annealed film at 700K. The refractive index n and the film thickness d were determined from optical transmittance data using Swanepoel''s method. It was found that the refractive index dispersion data obeys the single oscillator model from which the dispersion parameters were determined. The electric susceptibility of free carriers and the carrier concentration to the effective mass ratio were determined according to the model of Spitzer and Fan. The analysis of the optical absorption revealed both the indirect and direct energy gaps. The indirect optical gaps are presented in the amorphous films (as-deposited, annealed at 623 and 673K), while the direct energy gap characterized the polycrystalline film at 700K. Graphical representations of ε 1, ε 2, tan δ, −Im[1/ε*] and −Im[(1/ε*+1)] are also presented. ZnGa2Se4 is a good candidate for optoelectronic and solar cell devices. [Copyright &y& Elsevier]

Abstract: The optical properties of 2(3),9(10),16(17),23(24)-tetrakis-{6-(-benzofuran-2-carboxylate)-hexylthio} phthalocyaninatozinc(II) {Zn[Pc(b-S(CH2)6OCOBz-furan)4], (ZnPcBzF) thin film prepared by spin coating method were investigated. The optical constants of the prepared film were determined using spectrophotometric measurements of the transmittance and reflectance at normal incidence in the spectral range 200–800nm. The analysis of the spectral behavior of the absorption coefficient in the intrinsic absorption region revealed two direct allowed optical band gap of 2.58 and 3.87eV. The dispersion of the refractive index was discussed in terms of the single oscillator using Sellmeier dispersion formula. The high frequency dielectric constant (ε ∞ ) and the lattice dielectric constant (ε L ) were estimated. From the optical constants analysis, the optical conductivity was also considered. Discussion of the obtained results and their comparison with the previous published data were also given. The obtained results of this new zinc phthalocyanine benzofuran derivative (ZnPcBzF) support the desirable feature for the microelectronic and optoelectronic devices. [Copyright &y& Elsevier]

Abstract: Optical properties of the interaction between thiophanate methyl and human serum albumin have been investigated for biosensor applications. The interaction between human serum albumin (HSA) and thiophanate methyl (MT) was investigated by UV–Vis absorption spectra and atomic force microscopy. The optical constants (refractive index, absorption index, band gap and dielectric properties) of HSA, MT and MT+HSA films were determined using absorbance, transmittance and reflectance spectra. The refractive index dispersion curve (>530nm) exhibits the normal dispersion. The refractive index of the MT+HSA is higher than both HSA and MT alone due to the highest reflectance of the mixture of MT and HSA. This behavior is indicative of the complex formation between the MT and HSA. [Copyright &y& Elsevier]

A novel 6-butyl-3-[(4-chlorophenyl)diazenyl]-4-hydroxy-2H-pyrano[3,2-c] quinoline-2,5(6 H)-dione (dye 2) was effectively synthesized. The structure of (dye 2) has been set up using its accurate spectral and elemental analysis statistics. X-ray diffraction (XRD) analysis exhibited that (dye 2) has a polycrystalline nature. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were utilized. Optical parameters, as well as absorption index of (dye 2), were calculated using diffused reflectance wavelength measurements range 200–2300 nm. The bandgap in optics was determined by applying the Kubelka–Munk theory. Two optical band gap values (2.57 and 2.33 eV) were obtained. The first value (2.57 eV) is responsible for the direct transition while the other value (2.33 eV) is responsible for the indirect bandgap. AC fields were primarily utilized to calculate and interpret both AC electrical conductivity, the dielectric constant, and the dielectric loss. Finally (dye 2) turns out to be efficiently material and may act as a novel solar cell window due to its high bandgap. Image 1 • A novel (Dye 2) was effectively synthesized as a new organic semiconductor. • BCDHPQD has a polycrystalline nature with a triclinic and with space group (P1). • Two values of the optical band gap (2.57 and 2.33 eV) were obtained. • AC electrical conductivity, dielectric constant and dielectric loss were measured and analyzed. • Dye 2 acts as a novel solar cell window layer due to their high band gap. [ABSTRACT FROM AUTHOR]

The organic thin films of fluorescein dye were deposited on fluorine-doped tin oxide glass substrate by using low-cost spin coating technique. The surface of the deposited film was characterized by using AFM and X-ray diffraction spectroscopy, which shows that the film is uniform and amorphous. The spectrophotometric study was carried out at the wavelength range of 300–2500 nm. The spectral dependences of the linear refractive index and absorption index were found to decrease as the wavelength was increased. Tauc's plot study revealed that the film shows the direct transition and energy band gap values were found 1.75 eV and 3.55 eV for the thin film and the substrate, respectively. Optical constants were found nearly the same in the higher energy domain (1.0–4.5 eV). Spectroscopic method was employed to study the nonlinear optical susceptibility χ ( 3 ) . The deposited thin film is a promising optical system for new generation of optoelectronics. [ABSTRACT FROM AUTHOR]

In this paper, different homogenous compositions of Ge30− x Se70Ag x (0 ≤ x ≤ 30 at%) thin films were prepared by thermal evaporation. Reflection spectra, R(λ), for the films were measured in the wavelength range 400–2500 nm. A straightforward analysis proposed by Minkov [J. Phys. D: Appl. Phys. 22 (1989) p.1157], based on the maxima and minima of the reflection spectra, allows us to derive the real and imaginary parts of the complex index of refraction and the film thickness of the studied films. Increasing Ag content at the expense of Ge atoms is found to affect the refractive index and the extinction coefficient of the films. The dispersion of the refractive index is discussed in terms of the single-oscillator Wemple–DiDomenico model. Optical absorption measurements were used to obtain the fundamental absorption edge as a function of composition. With increasing Ag content, the refractive index increases while the optical band gap decreases. The compositional dependence of the optical band gap for the Ge30− x Se70Ag x (0 ≤ x ≤ 30) thin films is discussed in terms of the chemical bond approach. [ABSTRACT FROM PUBLISHER]

In photoelectric applications, indium chloride phthalocyanine (InClPc) films are used. However, these films have not been extensively studied. The deposition of InClPc films on cleaned fluorine-doped tin oxide (FTO) substrates was achieved by the thermal vacuum evaporating technique. The structure and morphology of the InClPc/FTO sample were checked by X-ray diffraction and atomic force microscopy. It was found that the films consist of fine particles with spherical structures dispersed across the surface with the grain size increased from 79 to 126 nm as film thicknesses increase from 48 to 137 nm, respectively. The linear optical constants of InClPc films are extracted from spectroscopy of reflectance and transmittance in the wavelength range of 250−2500 nm. The InClPc films have two energy gaps with values of E g1 = 1.37 eV and E g2 = 2.84 eV, which slightly change with the effect of thickness. According to Miller's law, nonlinear optical parameters were evaluated. Two separate laser sources (red He-Ne laser and green diode laser) were used for the optical limiting testing. As well as the red He-Ne laser power intensity performance is high. [ABSTRACT FROM AUTHOR]

The effect of different light wavelengths on methylene blue dye doped poly(methyl methacrylate) thin films during casting was investigated. The colour of the thin films which casted under the light sources of short wavelength ultraviolet light (254 nm), long wavelength ultraviolet light (367 nm) and sunlight were compared with the film casted in the dark. UV–vis spectrometer was used to measure the transmittance and absorbance of the fabricated films, and moreover, band gap energies were calculated. Results show that the wavelength of the applied light influences on the colour stability of methylene blue due to the photolysis of poly methyl methacrylate or chloroform (solvent). The highest decolourization rate was observed under the illumination of 254 nm, in which 90% of the colour was discharged after 30 min of illumination's time. However, no colour change was observed when the thin films were kept in dark during the casting step. [ABSTRACT FROM AUTHOR]

Al-doped ZnO thin films of thickness ≅60 nm were prepared by RF reactive magnetron sputtering. All optimum conditions were fixed through the depositions expect the power of the DC for Al-dopants. The structure of the as-grown samples measured by XRD showed that the films have a hexagonal structure with a space group p 63 m . The SEM micrographs illustrated uniform and/or non-uniform spherical shape for pure ZnO and Al-doped ZnO, while the sizes ranged from 18 to 35 nm. The linear refractive indices ( n ) were calculated on the basis of Fresnel's equations. The refractive index pounced peaks changed with changing the Al-dopnats. Based on the spectroscopic data, the linear and non-linear parameters such as the linear optical susceptibility χ (1) , non-linear refractive index ( n 2 ) or non-linear optical susceptibility χ (3) were calculated and analyzed from spectroscopic analysis. The Al-doped ZnO is a good candidate for new generation of electronic and optoelectronic devices. [ABSTRACT FROM AUTHOR]

• Transparent and conducting Indium (In) doped CdO films deposited sol-gel assisted spin coating technique. • The optical constants were calculated based on Kramers-Kroning relations. • The optical band gap value decreased with doping and is in the range of 2.73 to 2.31 eV. • The linear refractive index value increased with doping concentration, and it was in the range of 2.16 to 2.62. • The present samples are suitable for optoelectronic devices. The different ratios of Indium-doped cadmium oxide thin films were deposited on a glass substrate by a sol-gel assisted spin coating technique. The structure of the films was analyzed using XRD and depicts the amorphous nature of the doped films. All the films are highly transparent, and the value of transparency is around 80 % in the visible region. The optical constants were calculated based on Kramers-Kroning relations. The optical band gap value decreased with doping and is in the range of 2.73 to 2.31 eV. The enhancement in the linear optical properties such as refractive index, absorption index, and dielectric constant was also observed with an increase in the doping concentration. The linear refractive index value increased with doping concentration, and it was in the range of 2.16 to 2.62 indicates that the present sample is useful optical window applications. The nonlinear optical properties such as χ(1), χ (3), and n(2) are varying in the range of 0.005 to 0.468, 3.283 × 10−142 to 7.746 × 10−12 esu, and 7.986 × 10−13 to 1.119 × 10−10 esu, respectively. The enhancement in the optical properties with increasing doping concentration suggests the present films are useful for various optical device applications. The maximum dielectric constants are varying from 4.54 to 6.42, which indicates that the present samples are suitable for optoelectronic devices. Furthermore, nonlinear optical properties were analyzed and reported. [ABSTRACT FROM AUTHOR]

Thin films of As 40 S 60- x Se x ((0 ≤ x ≥ 60) at. %) have been efficiently synthesized through the process of vacuum thermal evaporation. The present framework analyzes the thin films to determine both optical and electronic parameters as a function of change of Se concentrations. The thickness of the obtained films, d have been mathematically determined utilizing Swanepoel's computations and experimentally via an MII-4 interference microscope with an accuracy of 1%. The thickness of the studied films has been closed to 500 ± 15 nm. Additionally, the optical properties of these films have been scrutinized from the transmittance and reflectance spectra measured by a UV–Vis–NIR spectrophotometer. The transmission spectra, T (λ) of such films have been documented in the spectral region 400–2500 nm. Based on the optical measurements, all of the linear optical constants, the linear optical and dielectric parameters, the linear and non-linear optical susceptibility criteria, and the material dispersion coefficient M (λ) have been computed. Besides, the nonlinear refractive index, energies of the electronic polarization have been determined. • This work is comprehensive for both the optical and the electronic properties. • This work focuses on the linear and non-linear optical parameters in detailed methods. • This work also focuses on the linear and non-linear electronic parameters. • This work utilizes Swanepoel's methods to measure the thickness of thin film in a simple way. [ABSTRACT FROM AUTHOR]

Zeolitic imidazolate frameworks (ZIF-8) thin films were fabricated via layer by a layer deposition method. The investigation of X-ray diffraction (XRD) of the ZIF-8 powder form was seen to be polycrystalline with a single cubic-phase structure. The lattice parameters and Miller index were calculated using Rietveld refinement by Fullprof software. XRD of ZIF-8 film demonstrates an amorphous structure. The morphology of the ZIF-8 films has therefore been studied with the scanning laser microscope method and found that the homogeneity and surface enhance with increasing the film thickness. On the other hand, it is found that ZIF-8 films have a direct electronic transition with two energy bandgaps (3.62 and 4.58 eV) and their values independent of the thickness of the films. The optical constants were calculated, and the refractive index esteems increment with expanding of the film thickness. This outcome might be credited to the interlude of the film in the preliminary phase of the deposition. The nonlinear optical constants for ZIF-8 film were calculated, and the third-order optical nonlinearity was expanded with expanding the film thickness. • Fabricate ZiF-8 thin film via Layer by layer deposition method. • Study the optical properties of ZiF-8 thin film. • Study the structural properties of ZiF-8 thin film. [ABSTRACT FROM AUTHOR]

Rhodamine B (RhB) films prepared via spin coater on polyacetate flexible substrates. The X-ray diffraction spectroscopy has been done for RhB/polyacetate flexible substrate and displays an amorphous structure of RhB films in the various thicknesses in the range of 74–303 nm. K-K relations used for determining the refractive index and exhibits a normal dispersion at λ > 600 nm and an anomalous dispersion at λ < 600 nm. The electronic transitions reveal two bands of absorbance Q band which due to the first π→π* transitions and Soret band due to the second π → π * transitions. Also, other linear optical constant such as absorption coefficient, band energy gap, dielectric constants, and optical conductivity were discussed. On the other hand, the first (χ (1) ) and third (χ (3) ) orders of nonlinear optical susceptibilities as well as a nonlinear refractive index (n 2) were calculated and discussed. The electrical and optical conductivities demonstrated the high absorption of RhB/flexible substrates inferring the chance of utilizing these films as optoelectronic gadgets. • Flexible optoelectronic materials have an increasing interest in the advancement of solar energy and biomedicine. • Investigated the optical spectroscopy by Kramers-Kronig (K‑K) method For Rhodamine B (RhB) films. • Calculated the nonlinear optical constants (χ(1)), (χ(3)) and nonlinear refractive index (n 2). • Calculated the electrical and optical conductivities. [ABSTRACT FROM AUTHOR]