Abstract In most previous investigations on VO2 smart windows, a low transition temperature (Tc) and desirable color have not been taken simultaneously, considering that they have not received enough study as yet. Here Ag particles periodic arrays (PPAs) were successfully embedded into monoclinic VO2(M) via self-assembly hexagonal-close-packed polystyrene templates. With the increase of Ag PPAs specific area, the Tc was reduced from 68 to 57.5 °C and the carrier density was increased. The mechanism of Tc reduction of Ag PPAs/VO2 composite films was clearly explained: more free electrons injected into VO2(M) films induces the larger absorbing energy at the nanometal-semiconductor junction. By changing the Ag PPAs specific area, the strong absorption of light in the ~630–730 nm (brown-yellow) band was achieved, thereby diluting the influence of the inherent brown-yellow color of the VO2(M) film. A low Tc and diluted color of the VO2(M) were simultaneously achieved by tuning Ag PPAs specific area, benefiting for the smart window application.

中文翻译：

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通过嵌入Ag颗粒周期性阵列降低转变温度并稀释VO2薄膜的棕黄色

摘要 在之前对 VO2 智能窗户的大多数研究中，考虑到尚未得到足够的研究，尚未同时采用低转变温度 (Tc) 和理想的颜色。在这里，通过自组装六方密堆积聚苯乙烯模板，成功地将银粒子周期性阵列 (PPA) 嵌入到单斜晶 VO2(M) 中。随着Ag PPAs比面积的增加，Tc从68℃降低到57.5℃，载流子密度增加。Ag PPAs/VO2 复合薄膜的 Tc 还原机制得到了清晰的解释：注入 VO2(M) 薄膜的自由电子越多，纳米金属-半导体结处的吸收能量越大。通过改变 Ag PPA 的比表面积，实现了~630-730 nm（棕黄色）波段的强吸收，从而稀释了 VO2(M) 膜固有的棕黄色的影响。通过调整 Ag PPA 的特定区域，同时实现了 VO2(M) 的低 Tc 和稀释颜色，有利于智能窗户应用。