Feng Jifei, Luo Yi, Wang Xinyi, Cai Guofa, Cao Rong
Key Laboratory for Special Functional Materials of Ministry of Education, National and Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology School of Materials Science and Engineering, Henan University, Kaifeng, 475004, China.
State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, China.
Small. 2023 Nov;19(46):e2304691. doi: 10.1002/smll.202304691. Epub 2023 Jul 4.
Fabrication of a patterned hydrogen-bonded organic framework (HOF) films on a large scale is an extreme challenge. In this work, a large area HOF film (30 × 30 cm ) is prepared via an efficient and low-cost electrostatic spray deposition (ESD) approach on the un-modified conductive substrates directly. Combining the ESD with a template method, variously patterned HOF films can be easily produced, including deer- and horse-shaped films. The obtained films exhibit excellent electrochromic performance with multicolor change from yellow to green and violet, and two-band regulation at 550 and 830 nm. Benefiting from the inherently present channels of HOF materials and the additional film porosity created by ESD, the PFC-1 film could quickly change color (within 10 s). Furthermore, the large-area patterned EC device is constructed based on the above film to prove practical potential application. The presented ESD method can be extended to other HOF materials; thus, this work paves a feasible path for constructing large-area patterned HOF films for practical optoelectronic applications.
大规模制备图案化的氢键有机骨架（HOF）薄膜极具挑战性。在这项工作中，通过一种高效且低成本的静电喷涂沉积（ESD）方法，直接在未改性的导电基底上制备了大面积的HOF薄膜（30×30厘米）。将ESD与模板法相结合，可以轻松制备出各种图案化的HOF薄膜，包括鹿形和马形薄膜。所获得的薄膜表现出优异的电致变色性能，具有从黄色到绿色和紫色的多色变化，以及在550和830纳米处的双波段调控。得益于HOF材料固有的通道以及ESD产生的额外薄膜孔隙率，PFC - 1薄膜能够快速变色（在10秒内）。此外，基于上述薄膜构建了大面积图案化的电致变色器件，以证明其实际应用潜力。所提出的ESD方法可扩展到其他HOF材料；因此，这项工作为构建用于实际光电应用的大面积图案化HOF薄膜铺平了一条可行的道路。
