Advanced multi-nozzle electrohydrodynamic printing: mechanism, processing, and diverse applications at micro/nano-scale

International Journal of Extreme Manufacturing, Год журнала: 2024, Номер 7(1), С. 012008 - 012008

Опубликована: Ноя. 13, 2024

Abstract Electrohydrodynamic (EHD) jet printing represents a novel micro/nano-scale additive manufacturing process that utilises high-voltage induced electric field between the nozzle and substrate to print micro/nanoscale structures. EHD is particularly advantageous for fabrication on flexible or non-flat substrates of large aspect ratio micro/nanostructures composite multi-material Despite this, has yet be fully industrialised due its low throughput, which primarily caused by limitations serial technology. The parallel multi-nozzle array-based become most promising option achieve large-scale increasing number nozzles realise multichannel printing. This paper reviews recent development technology, analyses motion with multi-nozzle, explains origins crosstalk effect under discusses several widely used methods overcoming it. work also summarises impact different parameters describes current using as well method they can realised independently. In addition, it presents an additional significant utilisation aside from enhancing single-nozzle production efficiency, phase change materials through multi-nozzle. Finally, future direction discussed envisioned.

Язык: Английский

---

CdSe-Based Quantum Dots Assisted Deep Ultraviolet Light Detection and Visualization

Optics Express, Год журнала: 2024, Номер 32(20), С. 35015 - 35015

Опубликована: Сен. 5, 2024

To clarify the positive effect of down-conversion process for ultraviolet (UV) and deep (DUV) light detection visualization, we choose, synthesize, characterize a spectrum direct-bandgap CdSe-based colloidal quantum dot (QD) solvents color-conversion layers (CCLs) across blue, green, yellow, orange, red hues. Their optical absorption, emission, response speeds under various UV DUV wavelength 280 nm, 372 405 nm are evaluated. The blue QD CCL demonstrated highest yield up to 0.68. By integrating this directly onto silicon-based photodiode, responded power 280-nm is significantly enhanced by 27 times; data decreases slightly 23 times when using orange QDs, due comparatively lower yield. For optimal result in communication system, QDs help exhibit 520 mV stimulated with 372-nm light, compared substantial improvement over original 120 mV. This enhancement makes reduces BER, especially at rates below 70 Mb/s, stronger avalanche photodiode (APD) 600 nm. Furthermore, demonstrate potential application patterning have also produced through inkjet printing, showcasing their printability, high stability air, pure color emission illumination. These results underscore significant full-color anti-counterfeiting solutions integration into flexible, printable wearables variety visualization applications.

Язык: Английский

---

Efficient Large-Area Quantum Cutting Photoconversion Films for Silicon Solar Cells on Photovoltaic Glass Using Knife Coating

The Journal of Physical Chemistry Letters, Год журнала: 2024, Номер 15(28), С. 7236 - 7243

Опубликована: Июль 8, 2024

Yb3+ doped perovskite nanocrystals (PNCs) serve as efficient photoconverters, exhibiting quantum cutting emission at ∼980 nm, which aligns precisely with the optimal response region of silicon solar cells (SSCs). However, severe nonradiative recombination caused by defects in crystal lattice and film boundaries, along limitations small-scale preparation, restricts their commercial application. Here, we used Ru3+ to mitigate CsPbCl3 PNCs adjusted luminescence, achieving a 175% photoluminescence yield (PLQY). The results show that ions enter lattice, fill lead vacancies, passivate defects. Furthermore, cysteine effectively eliminates surface forming Pb–S bonds, resulting films remarkable 117% PLQY, demonstrating strong photoconversion capabilities. Uniformly knife-coated on 20 × cm2 photovoltaic glass, these increased SSC efficiency from 21.45% 23.15%. This study showcases cost-effective photoconverter scalable coating method boost large-area SSCs.

Язык: Английский

---

Multiparticle Synergistic Electrophoretic Deposition Strategy for High-Efficiency and High-Resolution Displays

ACS Nano, Год журнала: 2024, Номер 18(27), С. 17715 - 17724

Опубликована: Июнь 25, 2024

Colloidal nanoparticles offer unique photoelectric properties, making them promising for functional applications. Multiparticle systems exhibit synergistic effects on the properties of their individual components. However, precisely controlled assembly multiparticles to form patterned building blocks solid-state devices remains challenging. Here, we demonstrate a versatile multiparticle electrophoretic deposition (EPD) strategy achieve assembly, high-efficiency, and high-resolution patterns. Through elaborate surface design charge regulation nanoparticles, precise control over particle distribution (gradient or homogeneous structure) in films using EPD technique. The system integrates silicon oxide titanium synergistically enhancing emission efficiency quantum dots high level field. Furthermore, superiority our integrate into large-area full-color display panels with resolution 1000 pixels per inch. results suggest great potential developing expanding diverse

Язык: Английский

---

Effects of Structural Variation in Electrospray Systems on Spray Characteristics

Soft Matter, Год журнала: 2024, Номер 20(34), С. 6791 - 6799

Опубликована: Янв. 1, 2024

Electrospraying is a method of atomizing fluids using high voltage potential difference. Since the atomization electrostatic does not directly charge nozzle but only uses difference, various equipment structures are possible. In case this study, 12 different nozzle, ring electrode, and substrate were configured, data on characteristics electrospray, such as spray modes applied voltage, coating area, current, velocity, factors used in industrial processes, verified. Data provided for generation process uniform continuous electrospray.

Язык: Английский

---

Continuous wave laser fabrication of small pitch/size perovskite pixels realizes high-resolution color conversion micro-LED displays

Nanoscale, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

As a new generation of display technology, micro-light-emitting diodes (micro-LEDs) have been widely recognized owing to their excellent performance in brightness, contrast ratio, resolution,

Язык: Английский

---

Hybrid-Protected Perovskite Quantum Dot Films with Ultra-High Efficiency and Stability for LED Backlighting

ACS Applied Materials & Interfaces, Год журнала: 2024, Номер unknown

Опубликована: Ноя. 19, 2024

All-inorganic lead halide perovskite quantum dots (PQDs) have emerged as highly promising materials for photonic and optoelectronic devices, solar cells, photocatalysts. However, PQDs encounter instability color separation issues because of ion diffusion. Current strategies mainly address stability in green CsPbBr3 PQDs, with limited focus on the red-mixed their inferior compared PQDs. Our study provides a new dual-protection methodology synthesizing high-efficiency red mixed-halide PQD films. Red CsPb(Br0.4I0.6)3 are embedded silicone resin then incorporated poly(methyl methacrylate) (PMMA) matrix to form PQDs@silicone/PMMA The high photoluminescence yield (PLQY) great recorded pure-red polymer film. ultrabright film was also successfully fabricated an outstanding PLQY beyond 94%. These films exhibited enhanced against thermal environmental degradation, attributed dense protective layer PMMA matrices by formation Si–halide Pb–O bonds, thereby reducing surface defects. Theoretical calculations reveal that combining improves interactions, eliminating uncoordinated Pb2+ enhancing stability. Applied white light-emitting diodes (WLEDs), these demonstrated broad gamut 143.4%, indicating potential efficient WLED backlighting.

Язык: Английский

---

Highly Efficient and Linearly Polarized Light Emission of Micro-LED Integrated with Double-Functional Meta-Grating

Nano Letters, Год журнала: 2024, Номер unknown

Опубликована: Дек. 18, 2024

Linearly polarized micro light-emitting diodes (LP-Micro-LEDs) exhibit exceptional potential across diverse fields. The existing methods to introduce polarization initially unpolarized Micro-LEDs and further enhance the degree of are, however, at expense low luminous efficiency. We fabricated a GaN-based blue Micro-LED integrated with Al nanograting specially designed Ag/GaN meta-grating, which overcomes dilemma between efficiency by simultaneously introducing effects mode selection energy recycling. LP-Micro-LED achieves an average extinction ratio (ER) 21.92 dB within ±60°, showing 2.04-fold increase in 1.32-fold ER compared Ag reflector design. This approach opens way toward next generation high-efficiency low-cost optoelectronic devices encryption, displays, optical communication, medicine.

Язык: Английский

---

Silica coating of quantum dots and their applications in optoelectronic fields

Chinese Chemical Letters, Год журнала: 2024, Номер unknown, С. 110798 - 110798

Опубликована: Дек. 1, 2024

Язык: Английский

---