Effect of CdSe nanoparticles doping on structural, and linear/nonlinear optical properties of PVC polymer for optoelectronic devices

Herein, CdSe nanoparticles NPs were synthesized via hydrothermal technique. Then, various weight percentages of CdSe NPs (0, 1, 2, and 3 wt.%) were dispersed into PVC matrix via solution casting. This study was explored the effect of various weight percentages of CdSe NPs (0, 1, 2, and 3 wt.%) on the structure, linear/nonlinear optical, optoelectronics features of PVC/CdSe nanocomposite films. The XRD profile revealed that the CdSe NPs have a hexagonal phase with a crystallite size of 22 nm. The Raman investigations of the PVC/CdSe nanocomposite film were conducted. The optical band gap energy declined from 5.25 eV to 4.92 eV with increasing CdSe NPs concentrations. Besides, the band tail value of the PVC film is 0.49 eV. The PVC/CdSe-1, PVC/CdSe-2, and PVC/CdSe-3 films demonstrate an increase in E U energy to 1.22, 1.84, and 1.89 eV, respectively. Additionally, the effect of CdSe NPs on the dispersion energy E d (2.96-5.71 eV) and the oscillation energy E o (3.07-3.76 eV) was exhibited. Furthermore, the oscillation frequency ( ω P ) and the relaxation time values (τ) of PVC-CdSe nanocomposite films are determined. Moreover, the nonlinear optical values of χ (1) , χ (3) , and n 2 increase as the CdSe NPs concentrations increase. The linear and nonlinear optical results revealed that PVC/CdSe films are suitable candidate materials for optoelectronic devices.