兼具墨水直写及电擦除的PEDOT(聚3，4-乙烯二氧噻吩）光子晶体图案的制备及性能研究

Pattern PCs have became an important express way for the application of PCs in display and devices. To overcome the difficulty in recyclability of the PC pattern and the presence of the PC pattern upon any external stimulus, this project put forward a novel way for the fabrication of PC pattern by direct writing/electronic erasing based on solvent-induced redox effect of PEDOT PCs. The pattern can be easily fabricated by ink-writing, and be kept permanent state, and being erased at desired by electronic. The PC pattern can be easily repeat write/erase. The earlier studies have preliminary confirmed the feasibility of the ink writing/electronic erasing. This project will systematically investigate the mechanism of solvent-induced redox of the PEDOT PC, including the solvent kinds, immersion time, and writing way for the blue-shift of stopand and pattern fabrication, find out the internal rule for the basic chemical composition, morphologies, and doping/dedoping state, to obtain an effective approach for the fabrication of stable, reversible, ink-writing/electronic erasing PC pattern. The stability, recyclability and the relative applications have should be investigated. The project will provide important materials/theoretical basis for the creation of novel PC-based optic devices.

光子晶体图案已成为光晶显示及器件应用的重要方式。本项目针对当前光子晶体图案难以实现可逆擦写这一制约其重复使用的关键问题，基于聚3,4-乙烯二氧噻吩(PEDOT)光子晶体受溶剂诱导产生的带隙蓝移现象以及其电化学特性，提出一种兼具墨水直写、电擦除的光子晶体图案制备新方法。申请人的前期研究初步证实了在PEDOT光子晶体基底上采用水性墨水直写/电擦除图案的可行性。本项目将系统研究溶剂诱导PEDOT光子晶体带隙蓝移的影响因素及影响机理，包括溶剂种类、溶剂作用时间、作用方式等对光晶带隙蓝移现象及最终图案制备的影响规律；深入理解这些不同溶剂诱导现象对其表面化学组成、微观结构，掺杂及脱掺杂态的影响，研究溶剂的诱导现象对其带隙蓝移的内在关联规律；最终实现具有良好稳定性及可重复性的兼具墨水直写及电擦除光晶图案的可控制备，并拓展所制备光晶图案的器件应用。该项目可为新型光晶图案及高性能光学器件提供材料及实验基础。

圆满完成了项目规定的各项指标。本项目为解决当前光晶图案难以可逆擦写重复利用的问题，开展了包括PEDOT、蓝相液晶、偶氮液晶、胆甾液晶等多类材料的光晶图案的可逆擦写，并研究了相关材料的性能和应用。主要研究内容包括（1）PEDOT图案：在PEDOT光子晶体上及PEDOT薄膜上分别实现了多彩图案的水写和电擦（Adv. Funct. Mater. 2019，ACS Appl. Mater. Interfaces, 2021）；并研究了PEDOT反蛋白石结构光子晶体的多溶剂响应的大带隙移动性能（Nanoscale Adv., 2021）；（2）蓝相液晶图案：基于单畴蓝相液晶网络实现高精度多彩“活”图案的可逆擦写（J. Mater. Chem. C, 2019，Adv. Funct. Mater. 2022）；基于蓝相液晶的软超材料非扩散相变实现防伪标签（Nat Comm, 2021）；（3）偶氮及胆甾相液晶图案：基于光驱动偶氮苯分子开关实现无墨水可重写光子晶体纸及光化学/光热偶氮苯反蛋白石驱动器（ACS Appl. Mater. Interfaces, 2021， 2022）；基于胆甾液晶微粒子及非聚合体系实现传感器及具有多模记忆效应的光/热/电/压力驱动光子图案（Sci China Mater 2022，Chemical Engineering Journal, 2022）；（4）其他图案及相关光电器件的尝试工作。这些工作为发展高性能光子晶体的器件及相关应用提供了实验和理论基础。相关研究结果以第一或通讯作者发表包括Nature Comm (1), Adv. Mater.(3), Adv. Funct. Mater.(2), ACS Appl Mater. Interf (4), Science China Materials (2), J. Mater.Chem. C (1)等26篇，申请及授权专利12个，参加国际会议邀请报告6个，参加国际国内会议多次.