Zhang Weiran, Wang Xiaojun, Wang Yuyang, Yang Guojian, Gu Chang, Zheng Wenxuan, Zhang Yu-Mo, Li Minjie, Zhang Sean Xiao-An
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
College of Chemical Engineering and New Energy Materials, Zhuhai College of Jilin University, Zhuhai, 519041, China.
Nat Commun. 2019 Apr 5;10(1):1559. doi: 10.1038/s41467-019-09556-5.
Bistable display has been a long-awaited goal due to its zero energy cost when maintaining colored or colorless state and electrochromic material has been highly considered as a potential way to achieve bistable display due to its simple structure and possible manipulation. However, it is extremely challenging with insurmountable technical barriers related to traditional electrochromic mechanisms. Herein a prototype for bistable electronic billboard and reader with high energy efficiency is demonstrated with excellent bistability (decay 7% in an hour), reversibility (10 cycles), coloration efficiency (430 cmC) and very short voltage stimulation time (2 ms) for color switching, which greatly outperforms current products. This is achieved by stabilization of redox molecule via intermolecular ion transfer to the supramolecular bonded colorant and further stabilization of the electrochromic molecules in semi-solid media. This promising approach for ultra-energy-efficient display will promote the development of switching molecules, devices and applications in various fields of driving/navigation/industry as display to save energy.
双稳态显示器因其在保持彩色或无色状态时零能量消耗，一直是人们期待已久的目标，而电致变色材料因其结构简单且具有可操作性，被高度认为是实现双稳态显示器的一种潜在方式。然而，这极具挑战性，存在与传统电致变色机制相关的难以克服的技术障碍。在此展示了一种用于双稳态电子广告牌和阅读器的原型，具有高能效，具有出色的双稳态（一小时内衰减7%）、可逆性（10个循环）、着色效率（430 cmC）以及极短的颜色切换电压刺激时间（2 ms），大大优于当前产品。这是通过氧化还原分子通过分子间离子转移到超分子键合着色剂来实现稳定，以及在半固体介质中进一步稳定电致变色分子来实现的。这种用于超节能显示器的有前景的方法将推动开关分子、器件以及在驱动/导航/工业等各个领域作为显示器以节省能源的应用的发展。
