| 초록 |
In optoelectronic applications, Fresnel reflection from interface between two optical media is a critical issue. This can cause a glare in flat-panel display and can decrease light absorption in photovoltaic devices. Thus, a superior antireflection(AR) coating is required to improve contrast and brightness in display devices and enhance the energy conversion efficiency in solar cell. Here, we demonstrate that an excellent AR coating with graded refractive index of silica thin films was achieved by stacking two poly (styrene-b-dimethylsiloxane) BCPs layers. We controlled the nanoporosity and refractive indices from 1.111 to 1.346 by selective etching. Our AR coating shows outstanding broadband AR characteristic with average transmittance of 99.1% in visible wavelength range and the chemical, mechanical, and thermal durability of AR coating also were confirmed. Furthermore, an anti-fogging capability is leading to significantly improved transmittance in a highly humid atmosphere. |
