A Dual-Band Tunable Electromagnetically Induced Transparency (EIT) Metamaterial Based on Vanadium Dioxide DOI Creative Commons
Lei Zhu, Shujie Wang, Yun Wang

et al.

Photonics, Journal Year: 2025, Volume and Issue: 12(5), P. 463 - 463

Published: May 9, 2025

A dual-band tunable terahertz electromagnetically induced transparency (EIT) metamaterial is introduced. The EIT consists of two rectangular split rings, metal strips, and a patterned vanadium dioxide (VO2) located at the back. rings serve as bright resonator to generate resonance valleys distinct frequencies. strips act dark are indirectly activated via coupling influence resonator. metamaterial’s response mechanism analyzed field effect two-particle model, with theoretical fitting results showing strong agreement simulation results. Moreover, VO2’s conductivity altered dynamically control in both frequency bands. Two windows, modulation depths 70% 75%, observed VO2 decreases. Simultaneously, reveal favorable slow light effect, group delays reaching 51 ps 74 windows. proposed holds considerable promise for future modulator, filter, device applications.

Language: Английский

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

Zheng Xiao,

Min Zhang,

Yihang Ding

et al.

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

Citations

1
Photoswitchable Branched Polyurethanes Based on Hexaarylbiimidazole for Photolithography DOI Open Access

Ying‐Yi Ren,

Pengfei Luo,

Jun‐Dan Huang

et al.

Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 21, 2025

Abstract Hexaarylbiimidazole (HABI) molecules have awakened a broad interest in photo‐processing, super‐resolution imaging, photoinduced self‐healing materials, and photomechanical hydrogels due to their excellent photosensitivity photo‐induced cleavage properties. In this work, novel photoswitchable branched polyurethanes (BPU), which are synthesized by copolymerizing HABI with glycerol, isophorone diisocyanate (IPDI), polyethylene glycol (PEG 400 ), is designed. 7‐Diethylamino‐4‐methylcoumarin (DMCO) introduced as radical quencher, can not only avoid the hydroxyl interfering from conventional scavengers during polymerization process but also promote efficient quenching of TPIR radicals. By optimizing DMCO concentration, content, high‐quality lithographic patterns achieved high film retention at low exposure doses. The structure exhibits superior solubility after compared previous crosslinked systems. This work provides HABI‐based polyurethane, acts one potential candidates for UV‐positive photoresists.

Language: Английский

Citations

0
Fabrication of QLED Devices with Designable Patterns via Regulating the Carrier Transport Behavior DOI Open Access
Junpeng Fan,

Lintao Nie,

Fangchang Tan

et al.

Small Methods, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Abstract The burgeoning advancements in near‐eye display devices intensify attention to ultra‐high‐resolution technology. Due the outstanding properties including high color purity, low turn‐on voltage, solution processability, etc., quantum dot light‐emitting diodes (QLEDs) are among most promising candidates for next‐generation displays. This study proposes a novel strategy construct QLED with designable patterns by adjusting energy level alignment and corresponding carrier transport behavior. As proof‐of‐concept, patterned hole injection layers (HIL) based on photosensitive poly(3,4‐ethylenedioxythiophene):poly(4‐styrenesulfonate) (PEDOT:PSS) composite prepared direct photolithography. Noteworthily, red optimized photolithographic HIL exhibit an increased external efficiency, from 17.2% 18.4%, extended operational lifetime (T 95 at 1,000 cd m −2 ), 471 827 h. Subsequently, three primary above 3,300 DPI (dot per inch) successfully achieved utilizing pixelated HIL, paving technical foundation developing ultra‐high resolution

Language: Английский

Citations

0
Direct Optical Patterning of Quantum Dot Light‐Emitting Diodes Based on Ultrafast, Low‐Energy, Site‐Controlled Click Chemistry Reaction DOI

Quan Nie,

Junpeng Fan, Rui Xu

et al.

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

Citations

0
Review of Industrialization Development of Nanoimprint Lithography Technology DOI Creative Commons
Yang Cao, Dongxin Ma, Haiming Li

et al.

Chips, Journal Year: 2025, Volume and Issue: 4(1), P. 10 - 10

Published: March 10, 2025

This article summarizes the current development status of nanoimprint lithography (NIL) technology and its application prospects in multiple industries. Nanoimprint has significant advantages, such as low cost, high resolution, no development, is not affected by standing wave effects, making it a potential industries semiconductors, photovoltaics, LEDs. However, still faces challenges terms film characteristics material selection during application. analyzes existing research discusses advantages fields patterned sapphire substrates (PSSs), Light-Emitting Diode (LED) chips, photovoltaic cells, etc., proposes role technological progress promoting industrialization. opportunities future industrialization process anticipates for large-scale production.

Language: Английский

Citations

0
Ultra-High-Resolution Full-Color Quantum Dot Light-Emitting Diodes through Cross-Linking-Assisted Hierarchical Confined Assembly DOI
Ke Fang,

Baoxiang Yang,

Hui Li

et al.

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

Citations

0
Quantum dots-doped microlenses made by photolithography DOI

Leila Issoufou Alfari,

Julien Houel,

Ali Belarouci

et al.

Optical Materials, Journal Year: 2025, Volume and Issue: unknown, P. 117028 - 117028

Published: April 1, 2025

Language: Английский

Citations

0
Research on the rigid preparation method of flexible micro coils for flexible self powered electrical devices using laser cutting technology DOI

Wencheng Li,

Huifang Liu, Yufei Lu

et al.

Optics & Laser Technology, Journal Year: 2025, Volume and Issue: 188, P. 112991 - 112991

Published: April 18, 2025

Language: Английский

Citations

0
A Dual-Band Tunable Electromagnetically Induced Transparency (EIT) Metamaterial Based on Vanadium Dioxide DOI Creative Commons
Lei Zhu, Shujie Wang, Yun Wang

et al.

Photonics, Journal Year: 2025, Volume and Issue: 12(5), P. 463 - 463

Published: May 9, 2025

A dual-band tunable terahertz electromagnetically induced transparency (EIT) metamaterial is introduced. The EIT consists of two rectangular split rings, metal strips, and a patterned vanadium dioxide (VO2) located at the back. rings serve as bright resonator to generate resonance valleys distinct frequencies. strips act dark are indirectly activated via coupling influence resonator. metamaterial’s response mechanism analyzed field effect two-particle model, with theoretical fitting results showing strong agreement simulation results. Moreover, VO2’s conductivity altered dynamically control in both frequency bands. Two windows, modulation depths 70% 75%, observed VO2 decreases. Simultaneously, reveal favorable slow light effect, group delays reaching 51 ps 74 windows. proposed holds considerable promise for future modulator, filter, device applications.

Language: Английский

Citations

0