High Color Conversion Efficiency Realized in Graphene-Connected Nanorod Micro-Light-Emitting Diodes with Hybrid Ag Nanoparticles and Quantum Dots Using Non-Radiative Energy Transfer and Localized Surface Plasmons DOI Open Access
Aoqi Fang,

Tang Penghao,

Yiyang Xie

et al.

Published: Sept. 20, 2023

As a medium for color conversion, quantum dots (QDs) can be employed in the display of full-color GaN-based Micro-Light-Emitting Diodes (µLEDs) arrays. Typically, system where QDs are excited by UV/blue µLEDs, coated onto LED surface. However, due to inherent defects and significant energy loss associated with this method, conversion efficiency (CCE) is suboptimal. In paper, we introduce an innovative approach etch uniform nanorod (NR) array surface µLEDs. We then mix Ag nanoparticles (NPs) fill gaps between nanorods. Simultaneously, utilize excellent conductivity, transparency, high strength graphene create transparent conductive electrode on nanopillar This serves connect individual nanorods enhance current spreading. The array's structure significantly reduces distance well (QW), reducing from excitation light source through non-radiative transfer (NRET) mechanism. Additionally, NPs function as local plasmons (LSPs) luminescent systems, further enhancing CCE via NRET study, compare effects two types different absorption resonance peaks device performance. Our results demonstrate that matching emission wavelength play more crucial role composite system. configuration achieves 77.78% µLEDs arrays, operating at 10 mA. Compared conventional planar µLED spin-coated surface, our proposed method improves impressive 285%. outcome underscores contribution NR LSPs QD-

Language: Английский

Enhancing photoluminescence performance of perovskite quantum dots with plasmonic nanoparticles: insights into mechanisms and light-emitting applications DOI Creative Commons
Gautham Kumar, Chien‐Chung Lin, Hao‐Chung Kuo

et al.

Nanoscale Advances, Journal Year: 2024, Volume and Issue: 6(3), P. 782 - 791

Published: Jan. 1, 2024

The PLQY of perovskite quantum dots increases when blended with Au nanoparticles, primarily due to accelerated radiative recombination. These nanocompositions are employed in light-emitting diodes as performance-enhancing color conversion layers.

Language: Английский

Citations

10
A universal high-resolution micro-patterning technique for solution-processed materials DOI Open Access

John Leo Velpugonda,

V. Naresh,

Matthew Yerich

et al.

Deleted Journal, Journal Year: 2025, Volume and Issue: 6(1), P. 1 - 1

Published: Jan. 1, 2025

Language: Английский

Citations

0
Over 1500 PPI quantum dot color conversion array by lift‐off DOI Open Access
Q. Wang Song, Jingrui Ma, Depeng Li

et al.

Journal of the Society for Information Display, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Abstract This study explores the application of lift‐off process for patterning quantum dot (QD) pixels using CdSe/ZnS core‐shell colloidal QDs. The evaluation influence different solvent and binder systems on effectiveness pixelation is detaily discussed. By optimizing combination, fabrication multi‐color QD patterns with pixel sizes ranging from 5 to 200 μm were demonstrated, achieving blue light conversion efficiencies exceeding 18% 25% red green pixels. It also improved uniformity, stability, resolution, lying foundation development ultra‐high‐resolution, Micro‐LED display. However, challenges remain in maximizing utilization packaging layers. Future research will aim develop high‐quality inks suitable photoresist optimize system further enhance performance stability QD‐based displays.

Language: Английский

Citations

0
Polarized Color Filters Using Colloidal Quantum Rod Nanocrystals for Advanced High‐Performance Displays DOI Creative Commons
Jianxin Song, Maksym F. Prodanov, Yiyang Gao

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract In this article, color filters (CFs) emitting linearly polarized light, achieving both full‐color and pixel‐level precision, which can simultaneously offer high saturation, ambient contrast ratio (ACR), efficiency for modern displays, are disclosed. The quantum rods (QRs) exhibit a narrow‐band emission that effectively mitigates traditional challenges of purity light losses. Specially designed ligands on the QR surfaces allow higher load material into polymer matrix with uniform alignment. Optimizing inkjet printing, photolithography, photoalignment processes, remarkable degree polarization (DOP) 0.65 is achieved precisely patterned red green CFs. Due to unidirectionally aligned QRs, liquid crystal display (LCD) equipped QRCF shows enhanced ACR, highlighting advantages their application in next‐generation displays over other types photoluminescence

Language: Английский

Citations

0
Tailoring CdTe colloidal quantum dot growth kinetics with Ag and in dopants for dazzling white-light emission DOI
V. Venkatachalam, Sasikala Ganapathy, P. Ilaiyaraja

et al.

Journal of Photochemistry and Photobiology A Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 116492 - 116492

Published: May 1, 2025

Language: Английский

Citations

0
Charge carrier injection and extraction of colloidal quantum dot assemblies: a perspective for optoelectronic devices DOI Creative Commons
Satria Zulkarnaen Bisri

Journal of Information Display, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 22

Published: May 11, 2025

Language: Английский

Citations

0
InGaN blue resonant cavity micro-LED with RGY quantum dot layer for broad gamut, efficient displays DOI Creative Commons
Tzu‐Yi Lee,

Chien-Chi Huang,

Yu-Ying Hung

et al.

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

Published: April 30, 2024

The technology of RGBY micro resonant cavity light emitting diodes (micro-RCLEDs) based on quantum dots (QDs) is considered one the most promising approaches for full-color displays. In this work, we propose a novel structure combining high color conversion efficiency (CCE) QD photoresist (QDPR) layer (CCL) with blue RCLEDs, incorporating an ultra-thin yellow filter. additional TiO

Language: Английский

Citations

3
Monolithic Integration of Full‐Color Microdisplay Screen with Sub‐5 µm Quantum‐Dot Pixels DOI

Jianhua Huang,

Ziwei Li,

Youliang Zhu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 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.

Language: Английский

Citations

3
Optimizing Peak Light-Emitting-Diode (LED) Wavelengths for Enhanced Color Performance and Visual Health in Blue Micro-LED Displays with Color-Conversion Layers DOI

Jing-Wei Ji,

Bao-Le Dai,

Shaoyu Zhang

et al.

ACS Applied Optical Materials, Journal Year: 2024, Volume and Issue: 2(7), P. 1277 - 1286

Published: March 22, 2024

This study examines the brightness conversion of green and red quantum dot (QD) color converters (QDCCs) utilizing blue-light panels at 437, 450, 460 nm. The are separately tested under same electrical power optical power. measurement results indicate that, as wavelength blue light becomes shorter, efficiency QD emission increases, resulting in a higher converted QDs. follows order 437 > 450 However, due to lower energy longer-wavelength light, more photons generated per unit (radiant flux) compared shorter-wavelength light. Therefore, difference from is not significant. For instance, stimulated by nm only slightly lower, approximately 4%, that Considering short-wavelength can potentially damage biological tissues, especially eyes, development will become focal point for next generation QD-based micro-LED displays, which be promising technology augmented reality (AR) virtual (VR) display system. We computed gamut QDCCs nm; yellow filter (Y-CF)/QDCCs 115.7%, 112.4%, 104.7% relative National Television System Committee (NTSC). In addition, filters (G/R-CF)/QDCCs produce values 117.0%, 114.2%, 110.0% NTSC, respectively. Finally, matter coverage, it evident excitation source with longer essential achieving full coverage region within NTSC or BT2020 gamut. It effectively solve shifts color.

Language: Английский

Citations

1
Highly Efficient Fine-Pitch Quantum Dot/Titanium Oxide Nanocomposites for Ultrahigh-Resolution Full-Color Micro-Light Emitting Diode Displays DOI Creative Commons

Kai-Ling Liang,

Wei-Hung Kuo,

Hui-Tang Shen

et al.

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(8), P. 2981 - 2991

Published: July 29, 2024

The development of full-color micro-LED displays has driven research on color conversion technology. Although various methods have been proposed, practical fine-pitch posed a challenge owing to the insufficient efficiency and low absorption in slim thickness material patterns serious optical crosstalk between adjacent subpixels. Herein, we introduce prototype display featuring high-resolution colloidal quantum dot (QD)/TiO2 nanoparticle composite arrays with an active-matrix blue light module. This innovative QD is prepared using hybrid method involving ligand-selective dispersion scattering particles, allowing considerable increase pattern resolution efficiency. Moreover, structure design distributed Bragg reflector dual-site light-confining matrix employed, resulting high gamut 92.8% regard National Television Standards Committee. Finally, 0.7 in. demonstrated 960 × 540 (1588 ppi) for first time.

Language: Английский

Citations

1