Abstract

We demonstrate controllable transmittance in an NIR-GH-LC device mediated by irradiation with pseudo-sunlight. Optical phase transition is induced in the proposed NIR-GH-LC device by the opto-thermal conversion of near-infrared dye, and the transparent and colored states are controlled with dichroic dye. Our results indicate that the optical phase transition can be observed upon irradiation with pseudo-sunlight when the concentration of near-infrared dye is 5 wt%, with the dichroic black dye also contributing to the optical phase transition via opto-thermal conversion. We find that the proposed NIR-GH-LC device can be switched between the transparent and colored states by irradiation with pseudo-sunlight. The NIR-GH-LC device is attractive for applications in self-shading smart windows that can be driven by sunlight.

摘要

我们在伪阳光照射介导的 NIR-GH-LC 装置中展示了可控的透射率。通过近红外染料的光热转换，在所提出的 NIR-GH-LC 装置中诱导光学相变，并用二向色染料控制透明和有色状态。我们的结果表明，当近红外染料浓度为 5 wt% 时，在伪太阳光照射下可以观察到光学相变，二向色性黑色染料也通过光热转换促进光学相变。我们发现所提出的 NIR-GH-LC 装置可以通过伪太阳光照射在透明和有色状态之间切换。NIR-GH-LC 器件对于可由阳光驱动的自遮阳智能窗户的应用很有吸引力。