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학술지 Solution-Processable Nanocrystal-Based Broadband Fabry-Perot Absorber for Reflective Vivid Color Generation
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저자
김수정, 최현경, 이헌, 홍성훈
발행일
201902
출처
ACS Applied Materials & Interfaces, v.11 no.7, pp.7280-7287
ISSN
1944-8244
출판사
American Chemical Society(ACS)
DOI
https://dx.doi.org/10.1021/acsami.8b19157
협약과제
18JB1300, 가시광파장용 나노결정기반 3차원 저손실 메타소재 개발, 홍성훈
초록
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.
키워드
broadband absorber, Fabry-Perot, nanocrystal, optical loss, reflective color, silver nanocrystal
KSP 제안 키워드
Absorption band, Absorption intensity, Broadband absorber, Broadband light, Fabry-Perot (F-P) cavity, High-resolution, Low color, Mechanical flexibility, Metal-insulator-metal structure, Metallic film, Optical loss