The effect of high dielectric BaTiO3 nanoparticle dimensions on the dielectric properties and electro-optical performance of polymer dispersed liquid crystal films.

Autor: Wei Wu, Xiaohui Sun, Dong Wang, Haining Qian, Bo Wang, Xiangwei Wang, Xianhui Rong, Xuyang Zhang, Guohua Wu
Zdroj: Journal of Materials Chemistry C; 5/28/2024, Vol. 12 Issue 20, p7386-7397, 12p
Abstrakt: To address the challenge of high switching voltages in polymer dispersed liquid crystal (PDLC) films, BaTiO3 nanoparticles of various dimensions were incorporated into a PDLC matrix. This study utilized a polymerisation-induced phase separation (PIPS) method, employing a UV curable photopolymer (NOA65), nematic liquid crystals (E7), and BaTiO3 (BTO) nanoparticles in zero-dimensional (0-BTO), onedimensional (1-BTO), and two-dimensional (2-BTO) forms. The integration of different dimensional BTO nanoparticles significantly influenced the dielectric properties of the PDLC films, as demonstrated by the micro-morphology and electro-optical performance analysis. Notably, the incorporation of 1-BTO nanoparticles resulted in the lowest saturation voltage of 17 V, a 58% reduction, attributed to the increased dipole moment. Additionally, the introduction of 1-BTO nanoparticles did not compromise the transmittance and long-term cycling stability of the PDLC films. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index