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

Abstract

Manufacturing cost is a major concern for electrochromic devices (ECDs) applications in smart windows for energy saving and low-carbon economy. Fully printing instead of vacuum-based chemical vapor deposition (CVD) process...

Photolithographically patterned and highly stable electrochromic displays enabled by a photo-assisted cross-linker

“…The detailed fabrication processes of electrolyte formulation and devices were similar to our previously reported work. 32,35 3 g of PEG-DA, 3 g of PMMA, 5 g of PC, 2.8 g of LiTFSI, 0.6 g of DI water, and 2 g of acetic ether were mixed together, and the mixture was stirred under an air atmosphere for 10 hours at 50 °C without eliminating bubbles during gel preparation. Then 10.5 mg of benzoin dimethyl ether was dissolved in the mixture at room temperature.…”

“…The detailed characterization and device measurements can also be tracked in our reported work, 27,32,35 including 1 H and 13 C nuclear magnetic resonance (NMR), ultraviolet (UV)-vis spectrum, matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF), Fourier transform infrared (FTIR), film surface morphology, film thickness, the optical absorption spectra over the range of 250-800 nm and the transmittance in response to the colored and bleached processes of ECDs. Besides, the surface morphology was analyzed using a field emission scanning electron microscope (SEM, Hitachi S4800 Japan).…”

Inkjet printing for smart electrochromic devices

“…Huang et al assembled a high-performance patterned ECD by integrating PProDOT inkjet-printed on ITO glass as the electrochromic layer (Figure 3I), PEDOT obtained by screen-printing as the ion storage layer, with the Ultraviolet (UV)-curable solid-state electrolyte based on lithium bis(trifluoromethane-sulfonyl) imide (LiTFSI). 95 In this study, electrolytes of different compositions were employed to study the effect of deionized water and ethyl acetate on the solid electrolyte. The electrolyte containing water and ethyl acetate enabled better electrochromic performance, which was attributed to the improved ionic conductivity of deionized (DI) water that reduced the response time of the device.…”

“…Reproduced with permission. 95 Copyright 2022, Royal Society of Chemistry. (J) Field emission scanning electron microscopy image of the printed WO 3 -PEDOT: PSS film.…”

Hybrid Ag/Ni mesh/PH 1000 transparent electrodes for high performance flexible electrochromic devices with exceptional stability

“…The procedure of making the FECD was as following: the electrolyte was made by mixing 5 g PEG-DA, 3 g PMMA, 5 g PC, 2.8 g LiTFSI with 0.6 g DI water and stirring at 50 • C for 10 h, then dissolving 17.5 mg of 2,2-dimethoxy-2-phenylacetophenone in the mixture [39], the prepared electrolyte was dropcasted to form a gel film on the surface of the bottom transparent electrode, which was covered with screen-printed PEDOT:PSS and the edges were sealed with 100 µm-thick double-side tape; the top transparent electrode, which was covered with spin-coated PProDOT was placed on top of the gel film and sealed with the double-side tape. Finally, the gel film was cured by UV light (200-400 nm) with an energy density of 600 mJ cm −2 for 10 s to reach all-solid-state FECD.…”