通过对聚合物分散液晶(PDLC)掺杂稀土氧化物纳米粒子Gd2O3, Eu2O3和Nd2O3, 测试可见光范围内PDLC掺杂前后的透射率随驱动电压的变化, 进而研究稀土氧化物对PDLC电光特性的调制作用。 实验结果表明: 掺杂Gd2O3的PDLC样品透射率在驱动电压低于10 V时, 随驱动电压升高而降低, 当驱动电压达到为15 V时, 样品对光感应出现了弛豫现象, 使得其透射率围绕10 V时的透射率做微小的上下波动, 当驱动电压达到20 V时, 样品透射率迅速升高, 并出现了滤光现象; 掺杂Eu2O3的PDLC样品透射率随驱动电压升高而下降, 下降的幅度较小; 掺杂Nd2O3的PDLC样品透射率随驱动电压的变化不明显。

By adding the thulium oxide nanoparticles ( NP) of Gd2O3 and Eu2O3 and Nd2O3 to polymer dispersed liquid crystals (PDLC), and the transmittances of PDLC and NP-PDLC changing with voltage in visible light was tested, and the thulium oxide modulation for PDLC was studied. The results show that transmittance of Gd2O3-NP-PDLC decreases with increasing voltage when the voltage is less than 10 V. The relaxation phenomenon of the sample appears at 15 V, and its transmittance curve fluctuates slightly around that at 10 V. The transmittance of Gd2O3-NP-PDLC increases rapidly at 20 V, and its filter phenomenon emerges. And the transmittance of Eu2O3-NP-PDLC decreases with increasing voltage, but the decrease is only slight. And the transmittance of Nd2O3-NP-PDLC changes with voltage insignificantly.