Modifying Precursor Solutions to Obtain Screen-Printable Inks for Tungsten Oxides Electrochromic Film Preparation
Source abstract
Abstract
Tungsten trioxide (WO3) is used to prepare the important electrochromic layer of the electrochromic device as a wide bandgap semiconductor material. In this study, WO3 electrochromic film was successfully prepared by screen printing. To modify the thixotropy and wettability of the ink, polyvinyl alcohol (PVA) and 2-perfluoroalkyl ethanol (FSO) were added in the ammonium meta-tungstate (AMT) solution. We found that the PVA additive could improve the dynamic viscosity of the solution and modify the uniformity of the film. 2-Perfluoroalkyl ethanol (FSO) could lower the surface tension and increase the wettability of the AMT solution on the substrate. By observing the morphology of the printed films, the ink formulas for screen printing were selected. We found the annealing process could help remove PVA. Through characterization of electrochromic performance, it was found that the best performing device had 42.57% modulation and 93.25 cm2·C−1 coloration efficiency (CE) for 600 nm light. This study showed great potential in the preparation of WO3 electrochromic devices by a low-cost screen-printing method.
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Research context
OpenAlex topics: Transition Metal Oxide Nanomaterials · Conducting polymers and applications · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Luminescent Materials and Devices, Institute of Polymer Optoelectronic Materials and Devices, South China University of Technology, Guangzhou 510640, China
Guangxi Key Lab of Agricultural Resources Chemistry and Biotechnology, Yulin Normal University, Yulin 537000, China
Department of Intelligent Manufacturing, Wuyi University, Jiangmen 529020, China
School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China
Institute of Semiconductors, South China Normal University, Guangzhou 510631, China
Funding
Guangdong Basic and Applied Basic Research Foundation · National Natural Science Foundation of China · Guangdong Major Project of Basic and Applied Basic Research · Fundamental Research Funds for the Central Universities · Ji Hua Laboratory scientific research project · South China University of Technology 100 Step Ladder Climbing Plan Research Project · 2021 Guangdong University Student Science and Technology Innovation Special Fund ("Climbing Plan" Special Fund)
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