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- W4306405386 abstract "Inkjet printing technology has broad application prospects in the manufacture of optoelectronic devices due to its advantages of mask-free and high material utilization. However, the coffee ring effect during printing can make the morphology non-uniform and has not been thoroughly explored. In this work, we used a high-precision in-situ inkjet printing system to print low-viscosity perovskite precursor inks on substrates to generate color-converting films. The viscosity of the perovskite precursor solution was improved by changing the ratio of the 5-AVABr additive, coupled with the choice of DMF with a higher boiling point as the solvent, which greatly reduced the evaporation of the solvent at the edge of the droplet, driving the formation of Marangoni flow which can result a uniform surface of droplets, culminating in a microarray of coffee-free rings. Notably, the perovskite can be crystallized in situ during printing without additional annealing, relying on a pumping system to assist the solvent evaporation. With the additive, the photoluminescence quantum yield of the film increased to 39%. The size of each pixel in microarrays was controlled to be less than 60 μm and 400 pixels per inch (PPI) is realized. Our work paves the way for large-area, high-efficiency production of perovskite color conversion films." @default.
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- W4306405386 date "2022-10-01" @default.
- W4306405386 modified "2023-09-28" @default.
- W4306405386 title "14.5: Perovskite Quantum Dot Color Conversion Pattern Fabricated by an In‐situ Inkjet Printing" @default.
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- W4306405386 doi "https://doi.org/10.1002/sdtp.15879" @default.
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