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Solution-Processable Nanocrystal-Based Broadband Fabry-Perot Absorber for Reflective Vivid Color Generation
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- Authors
- Soo-Jung Kim, Hyun-Kyung Choi, Heon Lee, Sung-Hoon Hong
- Issue Date
- 2019-02
- Citation
- ACS Applied Materials & Interfaces, v.11, no.7, pp.7280-7287
- ISSN
- 1944-8244
- Publisher
- American Chemical Society(ACS)
- Language
- English
- Type
- Journal Article
- Project Code
- 18JB1300, Development of low-loss, 3-dimensional metamaterials by nanocrystal building block for visible light applications, Sunghoon Hong
- Abstract
- Structural reflective colors based on Fabry-Perot (F-P) cavity resonances have attracted tremendous interest for diverse applications, such as color decoration and printing, display, and imaging devices. However, the asymmetric F-P cavity-based reflective colors proposed to date have low color purity and have difficulty to realize a desired vivid color because of a narrow absorption band characteristic in the visible light region. Here, a solution-processed, F-P ultra-broadband light absorber is newly proposed using a high lossy nanoporous material for vivid color generation. An asymmetric metal-insulator-metal structure consists of a high lossy nanoporous metallic film with coupled silver nanocrystals (Ag NCs) as the top layer. The absorbers not only increase the maximum absorption intensity up to ~98% but also widen the bandwidth by 300 nm, resulting in high color purity in micrometer-scale pixels. Furthermore, the solution-based absorber shows potential to realize a high-resolution display pixel and anticounterfeiting devices having mechanical flexibility using the inkjet printing technology.
- KSP Keywords
- Absorption band, Absorption intensity, Broadband light, Fabry-Perot (F-P) cavity, High-resolution, Low color, Mechanical flexibility, Metal-insulator-metal structure, Metallic film, Solution-processed, Top layer