In Situ Inkjet Printing Strategy for Fabricating Perovskite Quantum Dot Patterns

Abstract

Perovskite quantum dots are emerging as attractive materials for photonic and optoelectronic applications. Patterning is an important step to incorporate them into display, anti‐counterfeiting, and optical chip applications. In this work, an in situ inkjet printing strategy is demonstrated for fabricating perovskite quantum dots patterns by printing perovskite precursor solutions onto a polymeric layer. Importantly, this strategy can achieve bright photoluminescence with a quantum yield up to 80% and shows broad applicability to a variety of perovskites and polymers. Moreover, the as‐fabricated perovskite quantum dots patterns are composed of a microdisks array on the surface of polymeric layer. The size of these microdisks can be varied by adjusting the printing temperature. To demonstrate the potential use in display and advanced anti‐counterfeiting applications, color pixel patterns and 2D code pattern are fabricated by varying the precursor solutions. The combination of superior photoluminescence properties, simple process, and low cost makes the in situ inkjet printing strategy very promising for patterning perovskite quantum dots toward photonic integrations.

High‐Resolution Inkjet Printing of Quantum Dot Light‐Emitting Microdiode Arrays

“…As a digital patterning technology, inkjet printing gives rapid access to a wide range of geometries (Figure e) as required for rapid prototyping, personalized devices, or 3D architectures with integrated displays. Here, we successfully demonstrated the high‐resolution inkjet printing of green CdSe QDs devices, and we believe that the experimental strategy and printing technical route can be adapted for other appropriate CdSe QDs and even perovskite QDs …”

Smart Sensing Systems Using Wearable Optoelectronics

“…Due to outstanding properties, organometallic halide perovskites are applied to various optoelectronic devices including solar cells . Recent research utilized inkjet printing to explore patterning techniques, whereas a method of printing the 3D perovskite nanostructure was proposed . Such techniques are expected to facilitate the development of different types of wearable sensors suitable for the complex curvilinear body surface.…”

Ligand assisted swelling–deswelling microencapsulation (LASDM) for stable, color tunable perovskite–polymer composites

“…Another method is in situ crystallization of PNCs directly inside solid organic matrices. 19,20 In 2016, our group reported an in situ swelling-deswelling microencapsulation (SDM) strategy to achieve well dispersed, intimately passivated MAPbBr 3 PNCs inside polymer matrices that can survive boiling water treatment for 30 min, or two months of immersion in water with less than 7% efficiency loss. 21 However, this strategy can only produce pure bromide-based perovskites with good performance, while PPCs with other halide compositions barely emit and are still vulnerable to external stimuli.…”