Color brightness modulation of a responsive photonic liquid for multicolored electrochromic displays. Issue 8 (27th January 2022)

• Record Type: Journal Article
• Authors: Song, Shaoxin; Liu, Yang; Liu, Xuejuan; Ge, Jianping; Ge, Dengteng; Yang, Lili
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 8(2022)
• Page Start: 3114
• Page End: 3120
• Publication Date: 2022-01-27
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc05516j
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : We demonstrate an effective strategy for brightness modulation via the surface charge treatment of electrodes. The brightness can be raised by 110% due to the growth of a colloidal lattice. Abstract : Electrically-responsive photonic crystals have drawn extensive interest due to the growing demands of camouflage, displays, sensing, energy-saving buildings, etc., due to their fine control, fast response and convenient implementation. Veiled by the development on hue modulation, brightness/saturation tuning still remains a challenge. This work demonstrates a strategy to modulate the brightness of electrically-responsive photonic pixels via surface charge treatment of electrodes. The reflection intensity is raised by 110% due to the growth of the short-range ordered Fe3 O4 @C colloidal lattice as a result of enhanced Coulombic forces. The numerical simulation of the potential of the photonic liquid confirms that the potential distribution depends on the electrode surface charge. Furthermore, wide angle-independent photonic colors are well-tuned due to the anisotropic expansion/compression of the photonic lattice via electrophoretic movements of charged particles under an electric field. We believe that our work not only provides a useful way to modulate brightness but also suggests novel designs for electrically-responsive photonic devices.