Chromaticity-Tunable All-Inorganic Color Converters Fabricated by 3D Printing for Modular Plant Growth Lighting Devices DOI
Jiaxin Yang, Ming Feng, Yan Li

et al.

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(19), P. 23527 - 23537

Published: May 4, 2023

In photopolymerization-induced 3D printing of glass and ceramics, the demand for a slurry that has high photosensitivity, low viscosity, solid content leads to limited selection suspended particles. To this end, ultraviolet-assisted direct ink writing (UV-DIW) is proposed as new compatible approach. A curable UV synthesized, which overcomes material limitation. Benefiting from advantage UV-DIW process, CaAlSiN3:Eu2+/BaMgAl10O17:Eu2+ phosphors in (CASN/BAM-PiG) chromaticity-tunable specially shaped all-inorganic color converters are prepared plant growth lighting using an optimized heat treatment procedure. Size dome-type flat-type CaAlSiN3:Eu2+ (CASN-PiG) constructed batches. The manufactured PiG-based light-emitting diodes (LEDs) exhibit better dissipation capacity larger divergence angle. CASN/BAM-PiG confirmed by degree resemblance between emission spectra absorption carotenoid chlorophyll. series based LEDs with selective region doping constructed, can weaken reabsorption effects scientifically match requirements different plants. excellent color-tunable ability spectral indicate superiority process intelligent agricultural lighting.

Language: Английский

Patterning Quantum Dots via Photolithography: A Review DOI
Se Young Park, Seongjae Lee,

Jeehye Yang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(41)

Published: March 9, 2023

Abstract Pixelating patterns of red, green, and blue quantum dots (QDs) is a critical challenge for realizing high‐end displays with bright vivid images virtual, augmented, mixed reality. Since QDs must be processed from solution, their patterning process completely different the conventional techniques used in organic light‐emitting diode liquid crystal display industries. Although innovative QD technologies are being developed, photopatterning based on light‐induced chemical conversion films considered one most promising methods forming micrometer‐scale that satisfy precision fidelity required commercialization. Moreover, practical impact will significant as it directly exploits mature photolithography facilities widely available semiconductor industry. This article reviews recent progress effort to form via photolithography. The review begins general description process. Subsequently, types photolithographical applicable introduced, followed by achievements using these high‐resolution patterns. paper also discusses prospects future research directions.

Language: Английский

Citations

63
Enhanced Light Emission of Micro LEDs Using Graphene-Connected Micropillar Structures and Ag/SiO2 Nanoparticles DOI Creative Commons
Aoqi Fang, Qingqing Li, Jixin Liu

et al.

ACS Photonics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Language: Английский

Citations

2
Ultrahigh-resolution full-color micro-LED array with enhanced efficiency based on a color conversion technique DOI

Gaurav Ashish,

Chih‐Yuan Tsai,

Guan-Wen Wang

et al.

Photonics Research, Journal Year: 2023, Volume and Issue: 11(6), P. 925 - 925

Published: March 29, 2023

Micro-light emitting diodes (μLEDs) with remarkable advantages are becoming mainstream in next-generation display technologies such as augmented reality/virtual reality displays. However, further development of μLEDs still faces significant challenges, including mass transfer yield. Here, we report color conversion layer (CCL)-based, full-color, highly efficient μLED arrays a solution to address this challenging issue. Further amalgamating CCL purity enhancement film enables us realize 7 μm ×7 subpixel fluorescent gamut 95.34% DCI-P3, resulting an overall 1588 PPI (pixel per inch). Our results provide promising technique for fabricating higher PPI-based technology.

Language: Английский

Citations

24
Research progress of quantum dot photolithography patterning and direct photolithography application DOI
Zhong Chen, Yu Li,

Zhongwei Man

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(12), P. 10386 - 10411

Published: Aug. 24, 2024

Language: Английский

Citations

9
Recent progress of InGaN-based red light emitting diodes DOI
Zhicheng Lü, Kang Zhang,

Jianbang Zhuang

et al.

Micro and Nanostructures, Journal Year: 2023, Volume and Issue: 183, P. 207669 - 207669

Published: Sept. 20, 2023

Language: Английский

Citations

20
Atomic layer deposition technology for the development of high-quality, full-colour micro-LED displays DOI Creative Commons

Zijun Yan,

Suyang Liu,

Yue Sun

et al.

Next Nanotechnology, Journal Year: 2024, Volume and Issue: 5, P. 100051 - 100051

Published: Jan. 1, 2024

Micro light-emitting diodes (μLEDs) with unparalleled photoelectric characteristics are essential components for developing metaverse-related technologies. Immersive displays require reducing the LED size to micro- or sub-microscale while retaining optimal optoelectronic capabilities. μLEDs, fabricated through quantum dots colour conversion layer (QDs-CCL) process, offer a cost-effective solution achieving full-colour and ultrahigh quality. However, sidewall defects significantly affect optical electrical properties of μLEDs reduced chip size. Furthermore, QDs suffer from low excitation radiation inferior operational stability induced by their intrinsic properties. Atomic deposition (ALD) is promising chemical surface treatment technique self-limiting that can enhance μLED devices. In this review, we explore recent studies on ALD techniques device fabrication. We discuss in detail significant contribution repairing RGB tricolour chips. Moreover, applications protection preparation high-resolution CCLs. Finally, future prospects high-resolution, displays.

Language: Английский

Citations

8
Near‐Infrared Nanophosphors Based on CuInSe2 Quantum Dots with Near‐Unity Photoluminescence Quantum Yield for Micro‐LEDs Applications DOI

Wei Lian,

Datao Tu,

Xukeng Weng

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(9)

Published: Dec. 2, 2023

Abstract Highly efficient near‐infrared (NIR) luminescent nanomaterials are urgently required for portable mini or micro phosphors‐converted light‐emitting diodes (pc‐LEDs). However, most existing NIR‐emitting phosphors generally restricted by their low photoluminescence (PL) quantum yield (QY) large particle size. Herein, a kind of highly NIR nanophosphors is developed based on copper indium selenide dots (CISe QDs). The PL peak these QDs can be exquisitely manipulated from 750 to 1150 nm altering the stoichiometry Cu/In and doping with Zn 2+ . Their absolute PLQY significantly improved 28.6% 92.8% via coating ZnSe shell. By combining commercial blue chip, an pc‐LED fabricated remarkable photostability record‐high radiant flux 88.7 mW@350 mA among Pb/Cd‐free QDs‐based pc‐LEDs. Particularly, such acted as excellent luminescence converter micro‐LEDs microarray diameters below 5 µm, which exceeds resolutions current inkjet display pixels. findings may open new avenues exploration in variety applications.

Language: Английский

Citations

16
Synthesis and optical properties of Y3Al5O12:Ce3+,Cr3+ nano-phosphor for white LED DOI

Lin Lv,

Jianshan He, Qi Xiao

et al.

Ceramics International, Journal Year: 2023, Volume and Issue: 49(17), P. 28457 - 28464

Published: June 12, 2023

Language: Английский

Citations

15
Direct Photolithography Patterning of Quantum Dot‐Polymer DOI Open Access

Weishu Guo,

Jun Chen, Teng Ma

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(10)

Published: Nov. 23, 2023

Abstract For the new display technology based on quantum dots (QDs), achieving high‐precision red, green, and blue pixel arrays has always been a research focus in pursuit of high‐quality vivid image displays. However, problems such as material stability process environment make it difficult to guarantee quality patterns. The optical patterning represented by direct photolithography is considered highly promising method for ultrafine patterns at submicron level. This prepares patterned dot‐polymer films through light‐induced chemical changes. paper reviews progress focused QD‐polymer materials presents recent advances processes monochromatic/multicolor light patterning. article classifies QD‐polymers into three categories combining QDs with polymers different ways, including polymer‐coated QDs, QD ligands, photocrosslinkers QDs. Their synthesis schemes, functional features, challenges are also presented. In addition, scheme remove photomask during lithography using lasers field modulation proposed. It aims provide readers researchers some generalized information improvement ideas. can further advance development QD‐polymers.

Language: Английский

Citations

15
Water-Soluble Quantum Dots for Inkjet Printing Color Conversion Films with Simultaneous High Efficiency and Stability DOI
Le Wang,

Shuchen Shi,

Lu Yin

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(4), P. 5050 - 5057

Published: Jan. 16, 2024

Water-soluble quantum dots (QDs) are necessary to prepare patterned pixels or films for high-resolution displays with less environmental burden but very limited by the trade-off between photoluminescence and stability of QDs. In this work, we proposed synthesizing water-soluble QDs simultaneous excellent luminescence properties high coating amphiphilic poly(maleic anhydride-alt-1-octadecene)-ethanol amine (PMAO-EA) polymer on surface silane-treated These coated show a yield (PLQY) as 94%, they have good against light irradiation thermal attacks, owing suppression nonradiative recombination layer isolation oxygen water silica layer. The QDs, mixed ethylene glycol, enable inkjet printing QD color conversion (QD-CCFs) an average diameter 68 μm each pixel PLQY 91%. QD-CCFs demonstrated fabricate red-emitting mini-LEDs combining blue mini-LED chips, which external efficiency 25.86% luminance 2.44 × 107 cd/m2. We believe that strategy is applicable other paves avenue environmentally friendly mini/micro-LED displays.

Language: Английский

Citations

4