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A Large-Area Patterned Hydrogen-Bonded Organic Framework Electrochromic Film and Device
Jifei Feng1, Yi Luo1, Xinyi Wang1
1Key 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.
Small (Weinheim an Der Bergstrasse, Germany)
|July 5, 2023
Summary
Large-scale patterned hydrogen-bonded organic framework (HOF) films were fabricated using electrostatic spray deposition (ESD). This efficient method enables multicolor electrochromic devices for optoelectronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Fabricating large-scale patterned hydrogen-bonded organic framework (HOF) films presents significant challenges.
- Existing methods are often complex and costly, limiting practical applications.
Purpose of the Study:
- To develop an efficient and low-cost method for large-area HOF film fabrication.
- To demonstrate the creation of patterned HOF films for electrochromic devices.
Main Methods:
- Utilized electrostatic spray deposition (ESD) to create large-area HOF films (30 × 30 cm²) on conductive substrates.
- Combined ESD with a template method to produce variously patterned HOF films.
- Constructed a large-area patterned electrochromic (EC) device.
Main Results:
- Achieved multicolor electrochromic performance with color changes from yellow to green and violet.
- Demonstrated two-band regulation at 550 and 830 nm.
- Obtained rapid color change (within 10 s) due to HOF channels and ESD-induced porosity.
Conclusions:
- The ESD approach offers a feasible and scalable method for producing patterned HOF films.
- This technique paves the way for practical optoelectronic applications using HOFs.
- The ESD method is extendable to other HOF materials.
