Research of Electro-Optics Characteristics of Polymer Dispersed Liquid Crystals Doped with Thulium Oxide Nanoparticles Gd_2O_3 in UV Based on Numerical Fitting

摘要

Currently, the new electro-optic properties of polymer dispersed liquid crystal (PDLC) have attracted considerable attention. By adding the thulium oxide nanoparticles(NP) of Gd_2O_3 to PDLC, and testing transmittances of PDLC changing with voltage in visible light, and studying the thulium oxide modulation for PDLC. Nonlinear numerical fitting investigated the transmittance of PDLC that were doped with Thulium Oxide Nanoparticles Gd_2O_3, which was given the function of experimental data to be a Gauss function in the given experimental driving voltage. Fitting results showed that minimum correlation coefficient (R) was 0.9993 and the maximum mean square error (RMSE) was 0.004974. The results show that transmittance of Gd_2O_3-NP-PDLC decreases with increasing voltage when voltage is less than 10v. The relaxation phenomenon of the sample appears in 15v, and its transmittance curve fluctuates slightly around that in 10v. PDLC doped with Gd_2O_3 nanocrystals exhibits diverse electro-optical property, which makes the Gd_2O_3-doped PDLC be a kind of potential material in filter, color display, electro-optical switch applications Fitting results indicated that the mathematical fitting results were closed to the experimental data, which could deeply discuss electro-optical properties of the polymer dispersed liquid crystal (PDLC) were doped with Gd_2O_3 and provide a theoretical basis for it.