In transparent conductive electrodes using silver nanowire (AgNW) networks, regions with and without AgNWs exhibit different optical properties. This phenomenon, known as “pattern visibility,” is typically undesirable. In this study, the intrinsic optical properties – absorption, scattering and extinction – of AgNW/polymer composite films are derived from transmission and reflection spectra measured using an integrating sphere. These spectra reveal two major properties of AgNWs: transverse mode extinction due to localized surface plasmon resonance in the near-ultraviolet region, and longitudinal mode extinction in the visible to near-infrared region. By comparing AgNW/polymer composite films with similar sheet resistance, we find that composite films with smaller AgNW diameters show large absorption in the near-ultraviolet region, but limited scattering over the entire wavelength region, despite large amounts of AgNWs. We also show that pattern visibility is reduced for composite films with smaller AgNW diameters, which exhibit a smaller color difference ΔE00 (CIEDE2000) between the regions with and without AgNWs, when applied to the diffuse reflection spectra.

中文翻译：

---

银纳米线/聚合物复合薄膜的光学特性：吸收、散射和色差

在使用银纳米线 (AgNW) 网络的透明导电电极中，有和没有 AgNW 的区域表现出不同的光学特性。这种被称为“模式可见性”的现象通常是不可取的。在这项研究中，AgNW/聚合物复合薄膜的固有光学特性——吸收、散射和消光——来自使用积分球测量的透射和反射光谱。这些光谱揭示了 AgNW 的两个主要特性：近紫外区域局部表面等离子体共振引起的横模消光，以及可见光至近红外区域的纵模消光。通过比较具有相似薄层电阻的 AgNW/聚合物复合薄膜，我们发现具有较小 AgNW 直径的复合薄膜在近紫外区域显示出较大的吸收，尽管有大量的 AgNW，但在整个波长区域的散射有限。我们还表明，当应用于漫反射光谱时，具有较小 AgNW 直径的复合膜的图案可见性降低，在有和没有 AgNW 的区域之间表现出较小的色差 ΔE00 (CIEDE2000)。