Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Abstract

The optical properties of polyvinylpyrrolidine (PVP) polymer have been enhanced using ternary Zn 1-x Sn x S as a filler for UVregion optical applications. Solution casting technique is used to prepare different Sn molar ratios (x: 0-0.3) in Zn 1-x Sn x S filled PVP polymeric composite films (1.0 wt.%). SEM, FT-IR and UV-visible-NIR spectrophotometry is utilized to characterize the optical properties of the plain PVP and polymeric composite films. SEM images reveal the homogeneous dispersion of the filler (Zn 1-x Sn x S) in the host PVP matrix. The FT-IR spectroscopic measurements ensure the successful interaction of ternary Zn 1-x Sn x S material and the host PVP polymer. The cut off transmittance edge is shifted from 260 nm (host PVP) to 390 nm (polymeric composite). The direct optical energy bandgap of the prepared polymeric composite films are shifted from 4.78 eV (plain PVP) to 3.45 eV for Zn 0.7 Sn 0.3 S polymeric composite film. An enhancement of the refractive index (n) and the optical conductivity (σ opt.) of the polymeric composite films is achieved as compared with those of the plain one. The single oscillator (E 0) and dispersion (E d) energies of the polymeric composite films were determined using Wemple and DiDomenico (WDD) model. The prepared polymeric composite films are strongly recommended for UV-region optical applications.

Microstructure Study And Linear/Nonlinear Optical Properties of Bi-Embedded PVP/ PVA Films For Optoelectronic And Optical CUT-OFF Applications

“…Table 1 presents the values of the measured Ee of the polymer samples. It is decreased from 5.25 eV of PVA to 5.01 eV for the blend representing the decrease in the optical gap of PVA after combining with PVP of 4.62 eV [42]. In addition, this confirms the significant interactions between PVA and PVP matrices.…”

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

“…[ 8 ] Our obtained findings are consonant with published ones. [ 3,8,12 ] Moreover, the real energy gap values of the prepared NCs can be estimated by extrapolating the linear portions of the optical dielectric loss plots to match hν = 0, where the intercepts represent E g( ε i) values (Figure 7C). The estimated E g( ε i) values (Table 1) agree with those obtained from Tauc's method which confirm the direct electronic transitions ( r = 2) behavior of the prepared films.…”

“…Moreover, the easily of use and formation make them acting as host matrices for various materials to fit many applications. [ 1–9 ] In addition, the simplicity of controlling polymers' properties and tailoring them by filling makes them a hot and active scientific research point for a lot of uses. These applications include optoelectronics, solar cells, LEDs, electrolytes, superconductors, and others.…”

Investigation into Red Emission and Its Applications: Solvatochromic N-Doped Red Emissive Carbon Dots with Solvent Polarity Sensing and Solid-State Fluorescent Nanocomposite Thin Films

“…Positive solvatochromism occurs due to a lower shift in the UV-vis transition energy resulting in a longer wavelength. This phenomenon is observed because the dipole moment of the molecule in ground state is smaller than that of the dipole moment in the excited state [ 37 ]. On the other hand, fluorophores exhibit negative solvatochromism due to a higher shift of UV-vis transition energy resulting in a shorter wavelength [ 38 ].…”