Highly Luminescent and Stable Green Quasi‐2D Perovskite‐Embedded Polymer Sheets by Inkjet Printing

Abstract

Perovskite materials serve as promising candidates for display and lighting due to their excellent optical properties, including tunable bandgaps and efficient luminescence. However, their efficiency and stability must be improved for further application. In this work, quasi‐two‐dimensional (quasi‐2D) perovskites embedded in different polymers are prepared by inkjet printing to construct any luminescent patterns/pictures on the polymer substrates. The optimized quantum yield reaches over 65% by polyvinyl‐chloride‐based quasi‐2D perovskite composites. In addition, as‐fabricated perovskite−polymer composites with patterns show excellent resistance to abrasion, moisture, light irradiation, and chemical erosion by various solvents. Both quantum yield and lifetime are superior to those reported to date. These achievements are attributed to the introduction of the PEA+ cations to improve the luminance and stability of perovskite. This patterned composite can be useful for color‐conversion films with low cost and large‐scale fabrication.

In Situ Inkjet Printing Patterned Lead Halide Perovskite Quantum Dot Color Conversion Films by Using Cheap and Eco‐Friendly Aqueous Inks

“…Although the in situ inkjet printing strategy for the synthesis of PQD CCFs has made remarkable progress, organic substances such as N,N ‐dimethylformamide and dimethyl sulfoxide are often used as solvent in the PQD precursor inks, [ 32,33 ] which makes the inks expensive, highly toxic, and flammable. On the other hand, it would conform to the "green chemistry" concept advocated today if the water is used as a solvent in the ink for printing QD CCFs.…”

High-performance quasi-2D perovskite light-emitting diodes: from materials to devices

“…In addition, quasi-2D perovskite films are compatible with low-temperature solution-based manufacturing techniques, such as inkjet, roll-to-roll, and 3D printing, also providing great potential in large-area and flexible electronics. To date, among the patterning methods of perovskite materials, inkjet printing is particularly attractive due to its non-contact process, direct writing and plate making, mask-free nature, and flexible substrate 186 , 187 . Recently, Jia et al used inkjet printing technology to prepare a quasi-2D perovskite embedded in polymers and successfully constructed luminous patterns/pictures on the polymer substrate.…”

“…Recently, Jia et al used inkjet printing technology to prepare a quasi-2D perovskite embedded in polymers and successfully constructed luminous patterns/pictures on the polymer substrate. The composite combined the inherent stability of the quasi-2D perovskite and the outstanding barrier property of polyvinyl chloride (PVC), obtaining excellent resistance to abrasion, air, water, light irradiation, etc., and had broad prospects for application in large-area fluorescent billboards 187 . The available strategies for the scale-up production of large-area/flexible/printable quasi-2D PeLEDs are still limited, which poses significant challenges for commercial applications.…”

Metal Halide Perovskites Functionalized by Patterning Technologies

“…Furthermore, the inkjet printing technology allows in situ crystallization of perovskite QDs on the polymer films based on the swelling–deswelling fabrication, resulting in large‐area and high‐resolution RGB perovskite QD films with enhanced stability and flexibility, as exemplified in Figure 10b. [ 25,29,84,86 ] As mentioned in the anti‐counterfeiting section above, the highly polarized perovskite nanowire/copolymer composites can be used to fabricate RGB array films by being printed along three directions oriented with a 60° difference (Figure 10c). [ 107 ] Thus, the emission color from the arrays can be continuously tuned upon rotating both polarizers, which endows the printed films with the direct polarized light conversion for liquid crystal display backlighting.…”