Issue 38, 2022

High performance printed organic electrochromic devices based on an optimized UV curable solid-state electrolyte

Abstract

Manufacturing cost is a major concern for electrochromic device (ECD) applications in smart windows for energy saving and low-carbon economy. Fully printing instead of a vacuum-based chemical vapor deposition (CVD) process is favored for large-scale fabrication of ECDs. To adapt to the screen printing process, a UV curable solid-state electrolyte based on lithium bis(trifluoromethane-sulfonyl) imide (LiTFSI) was specially formulated. It contains poly(ethylene glycol) diacrylate (PEG-DA), LiTFSI, water, and ethyl acetate. The optimized ECDs have achieved a 0.6 s bleaching time at 0.6 V and a 1.4 s coloring time at −0.5 V. The ECDs also exhibited excellent stability, which could endure 100 000 cycles of color switching while still maintaining 35% of transmittance change at a 550 nm wavelength. A demo ECD has been fabricated with a screen printed electrolyte, exhibiting stable switching between the clear state and patterned color state.

Graphical abstract: High performance printed organic electrochromic devices based on an optimized UV curable solid-state electrolyte

Supplementary files

Article information

Article type
Paper
Submitted
10 6 2022
Accepted
05 9 2022
First published
06 9 2022

Nanoscale, 2022,14, 14122-14128

High performance printed organic electrochromic devices based on an optimized UV curable solid-state electrolyte

C. Huang, Z. Hu, Y. Yi, X. Chen, X. Wu, W. Su and Z. Cui, Nanoscale, 2022, 14, 14122 DOI: 10.1039/D2NR03209K

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