Dual-Ligand Red Perovskite Ink for Electrohydrodynamic Printing Color Conversion Arrays over 2540 dpi in Near-Eye Micro-LED Display

Nano Letters, Год журнала: 2024, Номер 24(12), С. 3661 - 3669

Опубликована: Фев. 26, 2024

The lack of stability red perovskite nanocrystals (PeNCs) remains the main problem that restricts their patterning application. In this work, dual-ligand passivation strategy was introduced to stabilize PeNCs and inhibit halogen ion migration during high-voltage electrohydrodynamic (EHD) inkjet printing. as-printed arrays exhibit highest emisson intensity least blue shift compared with samples other strategies under a high electric field EHD Combining green PeNC inks, single-color tricolor color conversion layer were successfully printed, minimum pixel size 5 μm spatial resolution 2540 dpi. coordinate CsPbBrI

Язык: Английский

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Color-conversion displays: current status and future outlook

Light Science & Applications, Год журнала: 2024, Номер 13(1)

Опубликована: Ноя. 1, 2024

The growing focus on enhancing color quality in liquid crystal displays (LCDs) and organic light-emitting diodes (OLEDs) has spurred significant advancements color-conversion materials. Furthermore, conversion is also important for the development commercialization of Micro-LEDs. This article provides a comprehensive review different types methods as well We summarize current status patterning process, discuss key strategies to enhance display performance. Finally, we speculate future prospects roles that will play ultra-high-definition micro- projection displays.

Язык: Английский

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Enhanced Light Emission of Micro LEDs Using Graphene-Connected Micropillar Structures and Ag/SiO₂ Nanoparticles

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Фев. 11, 2025

Язык: Английский

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Ameliorating Uniformity and Color Conversion Efficiency in Quantum Dot-Based Micro-LED Displays through Blue–UV Hybrid Structures

Nanomaterials, Год журнала: 2023, Номер 13(14), С. 2099 - 2099

Опубликована: Июль 19, 2023

Quantum dot (QD)-based RGB micro light-emitting diode (μ-LED) technology shows immense potential for achieving full-color displays. In this study, we propose a novel structural design that combines blue and quantum well (QW)-intermixing ultraviolet (UV)-hybrid μ-LEDs to achieve high color-conversion efficiency (CCE). For the first time, impact of various combinations QD TiO2 concentrations, as thickness variations on photoluminescence (PLQY), has been systematically examined through simulation. High-efficiency layer (CCL) have successfully fabricated result these simulations, leading significant savings in time material costs. By incorporating scattering particles CCL, scatter light disperse QDs, effectively reducing self-aggregation greatly improving illumination uniformity. Additionally, significantly enhances absorption within films. To enhance device reliability, introduce passivation protection using low-temperature atomic deposition (ALD) CCL surface. Moreover, impressive CCE values 96.25% 92.91% red green CCLs, respectively, by integrating modified distributed Bragg reflector (DBR) suppress leakage. Our hybrid structure design, combination with an optical simulation system, not only facilitates rapid acquisition optimal parameters highly uniform efficient color conversion μ-LED displays but also expands gamut 128.2% National Television Standards Committee (NTSC) space 95.8% Rec. 2020 standard. essence, research outlines promising avenue towards development bespoke, high-performance

Язык: Английский

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Wide heart-shaped mini-LEDs without a second lens as a large area, ultra-high luminance, and flat light source

Optics Express, Год журнала: 2024, Номер 32(4), С. 5874 - 5874

Опубликована: Янв. 24, 2024

In recent years, the demand for outdoor advertising and industrial display applications has been steadily increasing. Outdoor environments require higher brightness levels, thus requiring a reduction in thermal resistance of light source package. However, using secondary optical lenses to decrease number sources is not suitable solution because it may lead issue lens detachment. Therefore, this paper proposes packaging structure wide heart-shaped angular distribution mini-light emitting diodes (WHS mini-LEDs) with primary design enhance light-emitting angle. The chips are directly bonded an aluminum substrate metal eutectic process minimize packaging. experimental results indicated that WHS mini-LED package had total 6.7 K/W. 55-inch backlight module (BLM), only 448 mini-LEDs coupled quantum dot (QD) film enhancement (BEF) were required. Each lamp board was operated at 20.5 V 5.5 A. average luminance liquid crystal (LCM) can reach 2234.2 cd/m 2 uniformity 90% NTSC value 119.3%. This offers competitive advantage displays large areas, high brightness, color saturation.

Язык: Английский

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Detection and Quantification of Urine Albumin Using a Miniature Colorimetric Sensor Consisting of UVC LEDs and CsPbBr₃ Quantum Dot Color Converters

IEEE Journal of Selected Topics in Quantum Electronics, Год журнала: 2024, Номер 30(3: Flexible Optoelectronics), С. 1 - 7

Опубликована: Янв. 16, 2024

Albumin, a globular protein, is commonly used as an indicator of kidney damage when conducting invasive blood tests and non-invasive urine tests. Moreover, chemical methods that convert ultraviolet light to visible require additional labeling steps distinguish albumin from other proteins. In this study, address issue, miniature colorimetric sensor (MCS) including the source using flip-chip (FC) C emission diode (UVC-LED) green CsPbBr3 quantum dot (QD) film emitting at 530 nm for converting transmitting through bovine serum (BSA) human (HSA) fluorescence was developed. The proposed detected BSA HSA concentration range 0.05 4.00 mg/mL, with coefficients determination(R2) 0.9822 0.9850, limits detection 0.61 mg/mL 0.56 quantitation 2.02 1.86 respectively. Additionally, portable FC UVC-LEDs MCS offers reduced size weight while maintaining linearity, compared conventional spectrometer. UVC-LED emitters QD color convertors herein provides accurate, label-free, instantaneous real-time monitoring quantification tool albumin-associated disease diagnosis.

Язык: Английский

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Stable colour conversion layer with enhanced conversion efficiency by incorporating nanoparticles for micro-LED display application

Materials Today Chemistry, Год журнала: 2024, Номер 39, С. 102184 - 102184

Опубликована: Июль 1, 2024

Язык: Английский

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Monolithic Integration of Full‐Color Microdisplay Screen with Sub‐5 µm Quantum‐Dot Pixels

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 12, 2024

Monolithic integration of color-conversion materials onto blue-backlight micro-light-emitting-diodes (micro-LEDs) has emerged as a promising strategy for achieving full-color microdisplay devices. However, this approach still encounters challenges such the leakage and poor fabrication yield rate due to unsatisfied quantum dot (QD) material process. Here, monolithic 0.39-inch micro-display screens displaying colorful pictures videos are demonstrated, which enabled by creating interfacial chemical bonds wafer-scale adhesion sub-5 µm QD-pixels on micro-LED wafer. The ligand molecule with chlorosulfonyl silane groups is selected synthesis surface treatment material, facilitating preparation high-efficiency QD photoresist formation robust pixel integration. This leading record in devices highest brightness larger than 400 thousand nits, ultrahigh resolution 3300 PPI, wide color gamut 130.4% NTSC, ultimate performance service life exceeding 1000 h. These results extend mature integrated circuit technique into manufacture device, also lead road industrialization process micro-LEDs.

Язык: Английский

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Quantum Dot Luminescence Microspheres Enable Ultra‐Efficient and Bright Micro‐LEDs

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 21, 2025

Abstract Quantum dot (QD)‐converted micrometer‐scale light‐emitting diodes (micro‐LEDs) are regarded as an effective solution for achieving high‐performance full‐color micro‐LED displays because of their narrow‐band emission, simplified mass transfer, facile drive circuits, and low cost. However, these micro‐LEDs suffer from significant blue light leakage unsatisfactory electroluminescence properties due to the poor conversion efficiency stability QDs. Herein, construction green red QD luminescence microspheres with simultaneously high strong photoluminescence proposed. These exhibit external quantum yields exceeding 46% under 450 nm excitation, along excellent reliability against light, heat, water‐oxygen degradation, owing waveguide spatial confinement effects microspheres. The microsphere‐based achieve world‐record efficiencies 40.8% 22.1%, respectively, brightness values 1.7 × 10 8 7.6 7 cd m −2 , respectively. Finally, 0.6 inch red, green, monochrome demonstrated by integrating microsphere‐converted arrays thin‐film transistor backplanes, which show a pixel resolution 1700 PPI 000 .

Язык: Английский

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The crosstalk in full color micro-LED displays

Optics Letters, Год журнала: 2025, Номер 50(8), С. 2530 - 2530

Опубликована: Март 10, 2025

To achieve full-color micro-LED displays using color conversion methods, the effects of three-color cross talk and blue-light on layer were investigated. A light simulation was used to analyze caused by different pixel banks, comparing banks made from ordinary photoresist black photoresist. Various factors contributing also examined. The influence divergence angle blue structure for analyzed through simulations. Furthermore, potential solutions mitigate explored.

Язык: Английский

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