Direct Optical Lithography: Toward Nondestructive Patterning of Nanocrystal Emitters DOI Creative Commons
Seongkyu Maeng, Himchan Cho

Accounts of Materials Research, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Язык: Английский

High-Precision Printing Sandwich Flexible Transparent Silver Mesh for Tunable Electromagnetic Interference Shielding Visualization Windows DOI
Qixiang Wang, Yuhui Feng, Feifei Lin

и другие.

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

Опубликована: Дек. 12, 2024

Flexible transparent conductive films (FTCFs) with electromagnetic interference (EMI) shielding performance are increasingly crucial as visualization windows in optoelectronic devices due to their capabilities block radiation (EMR) generated during operation. Metal mesh-based FTCFs have emerged a promising representative which EMI effectiveness (SE) can be enhanced by increasing the line width, reducing spacing, or mesh thickness. However, these conventional approaches decrease optical transmittance increase material consumption, thus compromising and economic viability. Hence, significant challenge still remains realm of metal enhance SE while maintaining original equivalent usage. Herein, we propose an innovative symmetric structural optimization strategy create silver sandwich-FTCFs arbitrary customized sizes through high-precision extrusion printing technology for tunable performance. The meticulous adjustment xy-axis offsets starting point ensures perfect alignment on both sides substrate. This approach yields single-layer-FTCFs under identical parameters simultaneously achieving up 40% SE. improvement stems from synergistic effect multiple internal reflections wave between meshes. excellent is evidenced effectively blocking waves common such mobile phones, Bluetooth earphones, smartwatches. Our work represents advancement balancing transmittance, SE, efficiency high-performance cost-effective FTCFs.

Язык: Английский

Процитировано

3

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

и другие.

Journal of the Society for Information Display, Год журнала: 2025, Номер unknown

Опубликована: Янв. 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.

Язык: Английский

Процитировано

0

Heat‐Assisted Direct Photopatterning of Small‐Molecule OLED Emitters at the Micrometer Scale DOI Open Access

S.D. Roh,

Seunghan Lee,

Hyobin Ham

и другие.

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

Abstract A crucial step in fabricating full‐color organic light‐emitting diode (OLED) displays is patterning the emissive layer (EML). Traditional methods utilize thermal evaporation through metal masks. However, this limits achievable resolution required for emerging microdisplay technologies. Alternatively, direct photolithography, wherein to be patterned serves as a photoresist, offers cost‐effective method producing high‐resolution displays. Direct photopatterning small molecules used EMLs OLEDs are introduced. This employs photopolymerizable vinylbenzyl moieties directly anchored host and dopant small‐molecule emitters. By photoinitiating free radical polymerization reaction between under mild annealing conditions (60 °C), EML can photopatterned using an i ‐line UV source. Mild critical achieving reactions at low irradiation dose (0.6 J cm −2 ) without degrading luminescent properties of process referred heat‐assisted (HADP). Using HADP, red, green, blue OLED emitters with minimum pattern width 2 µm successfully fabricated. These side‐by‐side by simply repeating steps three times. promising alternative patterns desired ultrahigh‐resolution OLED‐based technology.

Язык: Английский

Процитировано

0

Formation of Homogeneous Nanostructure via Interference of Square Flattop Femtosecond Laser Pulses DOI Creative Commons

Takumi Sumimoto,

Godai Miyaji

Nanomaterials, Год журнала: 2025, Номер 15(5), С. 355 - 355

Опубликована: Фев. 25, 2025

We report on the formation of homogeneous nanostructures using a two-step ablation process with square flattop beams femtosecond (fs) laser pulses. The Gaussian beam output from ytterbium fs system was converted to by refractive shaper and mask. This split into two diffraction optical element, then downsized were spatially temporally superimposed titanium surface. In first step, interference fringes these formed grooves period 1.9 µm through ablation. Next, surface irradiated at normal incidence single form line-like nanostructure 490 nm in 53 μm area. had constant over 95% laser-processed area, indicating that ratio between modification area six times larger than for beam.

Язык: Английский

Процитировано

0

Direct Optical Lithography: Toward Nondestructive Patterning of Nanocrystal Emitters DOI Creative Commons
Seongkyu Maeng, Himchan Cho

Accounts of Materials Research, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Язык: Английский

Процитировано

0