ITO-based asymmetric Static and Dynamic Tunable Fabry-Perot color filters with High saturation, High brightness, and Wide color gamut properties

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-11 DOI:10.1016/j.optmat.2025.117483

Jialin Ji , Ruijin Hong , Chunxian Tao , Qi Wang , Hui Lin , Zhaoxia Han , Dawei Zhang

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Abstract

A color filter composed of chromium (Cr), a transparent conductive film (indium tin oxide, ITO), and silver (Ag) was proposed. Utilizing Fabry-Pérot (F–P) constructive interference, the Cr/ITO/Ag filter with an ITO thickness of 130 nm exhibits a resonance peak at 602 nm with a reflectivity exceeding 94 %, alongside a reflection valley at 410 nm characterized by an absorption rate as high as 99 % (complete absorption). This effectively prevents blue light from entering the human eye, benefiting from destructive interference. Experimental results confirm that this filter produces a high-purity yellow color. In comparison to Ag-based symmetric structures (Ag/ITO/Ag), the asymmetric Cr-based color filters demonstrate high-contrast broadband reflection peaks, resulting in purer and brighter reflected colors. By adjusting the thickness of the ITO spacer in the dielectric layer, we can achieve a full-color display encompassing the entire visible spectrum, with a color gamut of approximately 80 % of the standard red, green, and blue (sRGB). Furthermore, the proposed color filters can be easily electrochromic due to the modulation of the refractive index of the ITO, and they exhibit an angular tolerance of up to 50°. Overall, our structures offer novel perspectives for multifunctional color modulation and open new avenues for applications in color decoration, color printing, anti-counterfeiting, and smart camouflage technologies.

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基于ito的非对称静态和动态可调法布里-珀罗滤色器，具有高饱和度，高亮度和宽色域特性

提出了一种由铬（Cr）、透明导电膜（氧化铟锡，ITO）和银（Ag）组成的彩色滤光片。利用F-P相消干涉，ITO厚度为130 nm的Cr/ITO/Ag滤光片在602 nm处出现共振峰，反射率超过94%，在410 nm处出现反射谷，吸收率高达99%（完全吸收）。这有效地防止蓝光进入人眼，受益于破坏性干扰。实验结果证实，该滤光片可产生高纯度的黄色。与银基对称结构（Ag/ITO/Ag）相比，非对称铬基滤色片显示出高对比度的宽带反射峰，从而产生更纯净、更明亮的反射颜色。通过调整介电层中ITO间隔层的厚度，我们可以实现包含整个可见光谱的全彩色显示，其色域约为标准红、绿、蓝（sRGB）的80%。此外，由于ITO折射率的调制，所提出的滤色器可以很容易地电致变色，并且它们表现出高达50°的角公差。总的来说，我们的结构为多功能色彩调制提供了新的视角，并为色彩装饰、彩色印刷、防伪和智能伪装技术的应用开辟了新的途径。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.