Quantum Dot Nanomaterials: Empowering Advances in Optoelectronic Devices

Chemical Engineering Journal Advances, Journal Year: 2025, Volume and Issue: unknown, P. 100704 - 100704

Published: Jan. 1, 2025

Language: Английский

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Competitive Adsorption of Small Molecule Inhibitors and Trimethylaluminum Precursors on the Cu(111) Surface during Area-Selective Atomic Layer Deposition: A GCMC Study

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 20, 2025

In area-selective atomic layer deposition (AS-ALD), small molecule inhibitors (SMIs) play a critical role in directing surface selectivity, preventing unwanted on non-growth surfaces, and enabling precise thin-film formation essential for semiconductor advanced manufacturing processes. This study utilizes grand canonical Monte Carlo (GCMC) simulations to investigate the competitive adsorption characteristics of three SMIs─aniline, 3-hexyne, propanethiol (PT)─alongside trimethylaluminum (TMA) precursors Cu(111) surface. Single-component analyses reveal that aniline attains highest coverage among SMIs, attributed its strong interaction with Cu surface; however, this decreases by approximately 42% presence TMA, underscoring susceptibility effects. By contrast, 3-hexyne displays minimal alteration when it is competition effectively inhibiting TMA indicating suitability as robust SMI AS-ALD. PT also demonstrates moderate inhibitory capability against although less effective than regard. These findings highlight importance intermolecular forces energies determining effectiveness blocking surfaces. Mechanistic insights from nuanced influence specific SMI–precursor interactions, emphasizing necessity selecting SMIs tailored precursor interactions. work provides contributions rational design AS-ALD, implications improving precision optimizing AS-ALD parameters nanomanufacturing applications.

Language: Английский

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Emerging perovskite color converter for next-generation wireless communications

Microstructures, Journal Year: 2025, Volume and Issue: 5(3)

Published: May 6, 2025

Color converters are indispensable components in photoluminescence white-light devices. As optical wireless communication (OWC) systems leveraging solid-state lighting (SSL) continue to evolve, the development of next-generation color conversion materials has become a pressing priority meet stringent requirements for both high-quality illumination and high-speed data transmission. Halide perovskite quantum dots (PQDs) have emerged as promising candidates due their exceptional purity, high yield, fast response time. However, commercial viability PQD-based SSL-OWC is persistently impeded by several challenges, such insufficient modulation bandwidth, inadequate long-term stability, reliance on toxic elements. This review delves into applications within realm OWC. Initially, we conduct theoretical investigation factors that influence bandwidth transmission rate systems, revealing significance reducing PQD particle sizes enhancing these parameters. Subsequently, provide comprehensive overview optimization strategies across four critical aspects: selection excitation sources, refinement structure encapsulation, deployment schemes multiplexing techniques, advancement lead-free alternatives. Finally, summarize different types OWC applications, including white-light-based visible light transmitters, underwater color-converting photodetectors. These underscore dual functionality layers facilitation wavelength-tunable

Language: Английский

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Atomic Layer Deposition for Stable InP-Based On-Chip Quantum Dot microLEDs: Hybrid Quantum Dot Pockets

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(46), P. 63989 - 64001

Published: Nov. 8, 2024

Recent advances in synthesis techniques yield InP-based QDs with optical properties comparable to those of benchmark Cd-based QDs, making viable alternatives toxic for applications such as quantum dot LEDs (QLEDs). However, QLEDs typically suffer from a loss luminescence over time due exposure the ambient air. To avoid this, state-of-the-art hybrid barrier layers are explored consisting alternating organic/inorganic layers. In this study, QD thin films and embedded Kraton polymers encapsulated metal oxide layer by atomic deposition (ALD). Specifically, Al2O3, TiO2, ZnO deposited using trimethylaluminum (TMA), tetrakis(dimethylamino)titanium (TDMAT), diethylzinc (DEZ), H2O reactant. situ photoluminescence (PL) is used evaluate response during ALD coating. The results show that on pristine causes degradation luminescence, while not observed polymer-embedded QDs. long-term stability (ALD-coated) samples investigated accelerated humidity chamber at high temperature. Using single Al2O3 film capping greater QD-PL period least 300 h found compared samples. A similar study performed UV-patterned polymer (thiol–ene) structures, so-called pockets, envisioned use on-chip microLEDs. These pockets purposefully designed pick-and-place operations reduce complexity microLED manufacturing process. PL was significantly improved after incorporating films, these showing no clear signs 140 h. combination embedding merits scalability pocket structure demonstrated be an effective approach improving shows promise development stable,

Language: Английский

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Nanoparticle-Enhanced Ultrathin and Ultrahigh-Definition Color Converted Panchromatic Microarrays for Microlight-Emitting Diode Displays

ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 20, 2024

Microlight-emitting diodes (Micro-LEDs) are considered indispensable for next-generation display technologies. However, their further development faces numerous challenges, such as the difficulty in achieving high-yield mass transfer and use of environmentally harmful quantum dot color conversion techniques with suboptimal efficiency. To address these issues, we propose several key solutions. First, developed nontoxic stable organic–inorganic hybrid materials, utilizing integrated photolithography to replace time-consuming costly process. Additionally, refined aspect ratio efficiency microarray, optimized fabrication process produce microarrays free from nanoparticle residue without need protective layer curing. We successfully fabricated monochromatic 5080 PPI panchromatic 2540 PPI, 4 × μm ultrahigh-resolution microarrays. This is merely 3 thick, green red efficiencies 84.14% 71.20%, respectively. Furthermore, overall gamut coverage reached 99.11% DCI-P3 standard. Stability measurements at 60 °C 90% relative humidity 10 days showed that decreased by less than 2%. Our research results bring technological innovation field micro-LED applications.

Language: Английский

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Ground State Phase Diagrams of Mixed Spin [[Equation]] Infinite Alternating Double-Layers System of a Square Lattice for [[Equation]] and [[Equation]]

Published: Jan. 1, 2024

Language: Английский

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Performance comparison of flip-chip blue-light microLEDs with various passivation

Discover Nano, Journal Year: 2024, Volume and Issue: 19(1)

Published: Aug. 16, 2024

In this study, arrays of μLEDs in four different sizes (5 × 5 μm2, 10 25 50 μm2) were fabricated using a flip-chip bonding process. Two passivation processes investigated with one involving single layer SiO2 deposited plasma-enhanced chemical vapor deposition (PECVD) and the other incorporating Al2O3 by atomic (ALD) beneath layer. Owing to superior coverage protection, double-layers process resulted three-order lower leakage current μm chip-sized μLED arrays. Furthermore, higher light output power was observed each array double layers passivation. Particularly, highest EQE value 21.9% chip size achieved The improved 4.4 times introducing as compared that Finally, more uniform emission patterns double-layer ImageJ software.

Language: Английский

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Ground state phase diagrams of mixed spin (S,σ,σ,S) infinite alternating double-layers system of a cubic lattice for S=5/2 and σ=2.

Physica B Condensed Matter, Journal Year: 2024, Volume and Issue: 696, P. 416644 - 416644

Published: Oct. 30, 2024

Language: Английский

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