Direct Optical Lithography: Toward Nondestructive Patterning of Nanocrystal Emitters

Accounts of Materials Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 3, 2025

Language: Английский

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Direct Optical Patterning of Quantum Dot Light‐Emitting Diodes Based on Ultrafast, Low‐Energy, Site‐Controlled Click Chemistry Reaction

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 24, 2025

Abstract As one of the most promising next‐generation display technologies, quantum dot light‐emitting diodes (QLEDs) possess various advantages, such as high color purity, wide gamut, brightness, and solution processability. The preparation (QD) pixels is essential for commercializing QLED displays, direct photolithography considered an efficient method fabricating ultra‐high‐resolution devices over large areas. However, QD technology still in its infancy. This study presents a novel technique based on typical azide‐alkyne click reaction. enables cross‐linking adjacent QDs air environment using 365 nm UV light source, low‐energy dose (≈36 mJ cm −2 ). In addition, QLEDs with crosslinked layers exhibit excellent performance, achieving peak external efficiency (EQE) 20.05% maximum brightness 166,000 cd m at 5 V. Meanwhile, pristine photolithographic comparable operational lifetime (T 95 It believed that reaction will advance development patterned facilitate industrial production ultra‐high resolution displays.

Language: Английский

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Solution-Processed Quantum Dot Micropatterns: From Liquid Manipulation to High-Performance Quantum Dot Light-Emitting Diode Devices

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

Micropatterning quantum dots (QDs) is a key process for making high-performance dot light-emitting diodes (QLEDs), which have shown advantages in lighting and displays. So far, various solution processes been developed fabricating micropatterned QDs, where both uniform distribution well-defined edges are desirable. Very recently, with the flourishing of near-eye displays, high-resolution QD micropatterns appear particularly attractive, regretfully progressed poorly due to extremely complicated liquid dynamics at microscale. Here, we systematically discussed several representative strategies micropatterning including transfer printing, photolithography, inkjet structure-confined transfer. The fundamentals involved manipulation applications QLEDs were summarized, as well remaining challenges possible solutions from viewpoint QDs high uniformity, resolution, multicolor. We believe that perspective would inspire fabrication high-quality QLEDs.

Language: Английский

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Ultra-High-Resolution Full-Color Quantum Dot Light-Emitting Diodes through Cross-Linking-Assisted Hierarchical Confined Assembly

Nano Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Quantum dots (QDs) are vital for virtual reality and augmented displays due to their tunable optical properties. Although QD color converters enable blue light-emitting diode down-conversion green/red, efficiency stability issues hinder high-end display applications. Here, we employ a cross-linking-assisted hierarchical confined assembly method fabricate red, green, arrays. Specifically, micropillar templates with asymmetric wettability used sequentially deposit green red microwire arrays in mutually orthogonal directions on film, forming RGB 4,4′-Bis(3-vinyl-9H-carbazol-9-yl)1,1′-biphenyl (CBP-V) is introduced into QDs solve the problem of crosstalk. Full-color pixel resolutions 1814–2117 pixels per inch (PPI) successfully fabricated. Upon integration devices, adjustable emission from cool white light warm observed, peak external quantum (EQE) 16.14% luminance 226 054 cd m–2.

Language: Английский

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Ligand-Engineered Direct Optical Lithography of Nanocrystals with Industrially Compatible Solvents

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Nondestructive and precise patterning of colloidal semiconductor nanocrystals (NCs) is critical in the fabrication solution-processable optoelectronic devices. Direct optical lithography functional inorganic nanomaterials (DOLFIN) widely used for high-resolution NCs. However, conventional DOLFIN chemistry relies on solvents incompatible with mainstream industrial processes, which impedes DOLFN's widespread adoption as a universal technology real-world additive manufacturing. In this work, we proposed specific criteria ligand design designed series multifunctional ligands combining methacrylate carboxyl groups. Such allowed us to colloidally stabilize optically pattern NCs i-line h-line light sources by using industrially friendly solvents. We showed that single-color multicolor patterns spatial resolution 1 μm can be achieved without compromising properties. The patterned NC films photoluminescence (PL) electroluminescence (EL) par those unpatterned films. red-emitting QLEDs peak external quantum efficiency (EQE) 22.0%. ability reliably bright from PGMEA will facilitate an industrialized system-level integration platform significantly impact production high-resolution, full-color QLED

Language: Английский

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Direct Lithography for Regulating Multiple Properties of Organic Semiconductors via Photo‐Crosslinkers

Macromolecular Materials and Engineering, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Abstract Photo‐crosslinkers, as materials with negative photoresist characteristics, are applied in the direct lithography process of organic semiconductor devices. Compared to commonly used processes, only requires three steps: spin‐coating, exposure, and development, achieve optical patterning channel, eliminating need for complex procedures such protection, baking, etching, transfer. Furthermore, during this process, photo‐crosslinker remains blended film, subsequently influencing crystalline structure morphology film. These alterations will further impact multiple properties By utilizing characteristic, design can effectively regulate enhance tensile properties, charge carrier mobility, stability, dielectric device. This approach enables high‐precision integrated circuits while synchronously enhancing their various performance attributes. Although there some relevant reports, a systematic summary organization these photo‐crosslinkers on semiconductors absent. For future development lithography, is crucial. Therefore, review systematically classifies summarizes functions thin film devices, providing guidance novel improve

Language: Английский

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Visible Light Induced Ultra‐High Adhesion Enhancement by Carbene O─H and C─H Bonds Insertion

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 14, 2025

Abstract A novel aryl diazo ester‐based acrylate monomer is synthesized and incorporated into radical copolymerization to develop a visible light‐responsive adhesive. This ester exhibits stability during polymerization but rapidly activates under light irradiation, generating carbene intermediates that undergo instantaneous O─H C─H bonds insertion reactions. mechanism enables in situ covalent cross‐linking within the adhesive matrix at adhesion interface, synergistically enhancing both cohesion interfacial adhesion. Compared non‐irradiated counterparts, bonding strength increased by 157% (reaching 22.1 MPa) upon irradiation. Remarkably, ambient sunlight also triggered this enhancement, highlighting its energy‐efficient eco‐friendly attributes. work proposes an innovative strategy for designing stimuli‐responsive smart adhesives with potential applications ultra‐high‐strength fields such as structural bonding.

Language: Английский

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Design, Exploitation, and Rational Improvements of Diazirine-Based Universal Polymer Crosslinkers

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(22), P. 3327 - 3342

Published: Oct. 31, 2024

ConspectusAddition of new covalent bonds between the chains thermoplastic polymers (i.e., crosslinking) provides improved mechanical strength and enhanced high-temperature performance while also providing an effective strategy for photopatterning. Traditionally, however, crosslinking each polymer substrate has required use a specific technology (hydrosilylation PDMS, vulcanization rubber, etc.). The lack general solution to challenge means that there are many thermoplastics (e.g., polypropylene or polyhydroxyalkanoates) have desirable properties, but which cannot be upgraded by traditional technologies.Our lab developed first universal crosslinkers aliphatic leveraging trifluoromethyl aryl diazirine motifs, functional groups been widely used in chemical biology >30 years, seldom exploited materials science. These novel reagents work (via C–H insertion) on essentially any commodity contains bonds, including industrial plastics like (the outstanding field >50 years), as well commercially important elastomers polydimethylsiloxane), biodegradable polycaprolactone), green derived from biomass polyhydroxyalkanoates).Subsequent structure–function our group led were >10-fold more undergoing insertion with substrates. We then synthesis electronically optimized diazirines incorporated them into family cleavable crosslinker reagents, permit on-demand generation reprocessable thermosets. At same time, other replaced perfluoropropyl linker first-generation series dynamic linkages; these ready vitrimeric can reactive compatibilization immiscible plastic waste.Since publication initial Science paper 2019, this burgeoning diazirine-based experienced explosion interest. Publications others described adhesion, photopatterning low dielectric microelectronics, direct optical printing quantum dots. Our shown heighten robustness ice-phobic coatings improve woven ballistic fabric, while─perhaps most unexpectedly─substantially improving stability high-performance perovskite solar cells. Electronically covalently link proteins surfaces, suggesting broad range applications biocompatibilization medical devices. This Account will summarize development science over past 5 years. A brief comparison made, Summary Outlook section at end Account, competing (and often complementary) based upon azide diazoalkyl motifs. Finally, we compiled Frequently Asked Questions list covers practical aspects design application; is appended Supporting Information.

Language: Английский

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Ultraviolet-Light-Induced P–H Insertion of α-Halocarbenes

Organic Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 29, 2024

An intriguing P–H insertion of arylhalodiazirines with H-phosphorus oxides under ultraviolet-light irradiation is described. This methodology provides an efficient and straightforward route to the construction a variety α-halophosphorus in good yields (≤95%), which represents unique example α-halocarbenes for C–P bond formation. The metal-free protocol features advantages mild reaction conditions, high atom economy, environmental friendliness.

Language: Английский

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