Junchi Chen
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View article: Enhanced photoluminescence of a microporous quantum dot color conversion layer by inkjet printing
Enhanced photoluminescence of a microporous quantum dot color conversion layer by inkjet printing Open
Owing to their high color purity, tunable bandgap, and high efficiency, quantum dots (QDs) have gained significant attention as color conversion materials for high-end display applications. Moreover, inkjet-printed QD pixels show great pot…
View article: Organosilicon-Based Ligand Design for High-Performance Perovskite Nanocrystal Films for Color Conversion and X-ray Imaging
Organosilicon-Based Ligand Design for High-Performance Perovskite Nanocrystal Films for Color Conversion and X-ray Imaging Open
Perovskite nanocrystals (PNCs) bear a huge potential for widespread applications, such as color conversion, X-ray scintillators, and active laser media. However, the poor intrinsic stability and high susceptibility to environmental stimuli…
View article: Terawatt-level 2.4-µm pulses based on Cr:ZnS chirped pulse amplification
Terawatt-level 2.4-µm pulses based on Cr:ZnS chirped pulse amplification Open
Chromium-doped chalcogenides, with broad and high emission cross-sections near 2.4 µm, are very suitable for generating high-peak-power pulses in the short-wave infrared range. In this Letter, we demonstrate a TW-level system with a repeti…
View article: A Review on Quantum Dot‐Based Color Conversion Layers for Mini/Micro‐LED Displays: Packaging, Light Management, and Pixelation
A Review on Quantum Dot‐Based Color Conversion Layers for Mini/Micro‐LED Displays: Packaging, Light Management, and Pixelation Open
Mini/microlight‐emitting diodes (LEDs) are one of the most promising technologies for next‐generation displays to meet the requirements of demanding applications, including augmented reality/virtual reality displays, wearable devices, and …
View article: Recent Progress in Light‐Scattering Porous Polymers and Their Applications
Recent Progress in Light‐Scattering Porous Polymers and Their Applications Open
Conventional inorganic‐nanoparticles‐based scattering systems have dominated many practical applications for years. In contrast, the rise of porous polymers is perceived as a game‐changer due to their low cost, facile preparation, and grea…
View article: High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer (Adv. Mater. Interfaces 9/2023)
High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer (Adv. Mater. Interfaces 9/2023) Open
Laser Surface Micro/Nano-Structuring A thin frost layer is preliminarily formed by condensation of ambient water vapor onto the cooled workpiece surface with a temperature below freezing point. When a femtosecond laser is focused onto the …
View article: High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer
High‐Quality Femtosecond Laser Surface Micro/Nano‐Structuring Assisted by A Thin Frost Layer Open
Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unw…
View article: High-quality femtosecond laser surface micro/nano-structuring assisted by a thin frost layer
High-quality femtosecond laser surface micro/nano-structuring assisted by a thin frost layer Open
Femtosecond laser ablation has been demonstrated to be a versatile tool to produce micro/nanoscale features with high precision and accuracy. However, the use of high laser fluence to increase the ablation efficiency usually results in unw…
View article: 13.4 fs, 0.1 Hz OPCPA Front End for the 100 PW-Class Laser Facility
13.4 fs, 0.1 Hz OPCPA Front End for the 100 PW-Class Laser Facility Open
Here, we report the recent progress on the front end developed for the 100 PW-class laser facility. Using 3 stages of optical parametric chirped-pulse amplification (OPCPA) based on lithium triborate (LBO) crystals, we realized a 5.26 J/0.…
View article: The kapok petal: superhydrophobic surface induced by microscale trichomes
The kapok petal: superhydrophobic surface induced by microscale trichomes Open
For the first time it is reported that the kapok petal shows a superhydrophobic characteristic with a static water contact angle higher than 150°. Intriguingly, there exist single-scale micro-trichomes and no more nanocrystals on a kapok p…
View article: High Dynamic Range Smart Window Display by Surface Hydrophilization and Inkjet Printing
High Dynamic Range Smart Window Display by Surface Hydrophilization and Inkjet Printing Open
Mechanoresponsive smart windows have been intensively investigated in recent years as they offer various applications for signage and light management. However, integrating a display functionality into such smart windows remains a challeng…
View article: Demonstration of joule-level chirped pulse amplification based on tiled Ti:sapphire amplifier
Demonstration of joule-level chirped pulse amplification based on tiled Ti:sapphire amplifier Open
A novel tiled Ti:sapphire (Ti:S) amplifier was experimentally demonstrated with >1 J amplified chirped pulse output. Two Ti:S crystals having dimensions of 14 mm× 14 mm× 25 mm were tiled as the gain medium in a four-pass amplifier. Maximum…
View article: Discretely Tunable Multiwavelength Visible Laser Based on Cascaded Frequency Conversion Processes
Discretely Tunable Multiwavelength Visible Laser Based on Cascaded Frequency Conversion Processes Open
We demonstrate a discretely tunable multiwavelength visible laser through second harmonic generation (SHG) and sum frequency generation (SFG) of multiorder Stokes lasers generated from an external Raman laser oscillator. The Raman laser os…
View article: Ultrabright bimetallic AuAg complex: From luminescence mechanism to biological application
Ultrabright bimetallic AuAg complex: From luminescence mechanism to biological application Open
Metal clusters have attracted wide interests due to their unique electronic and optical properties, but the low luminescence quantum yield (QY) prevents them from potential biomedical applications. In this work, silver-doped Au nanocluster…
View article: Microlens arrays with adjustable aspect ratio fabricated by electrowetting and their application to correlated color temperature tunable light-emitting diodes
Microlens arrays with adjustable aspect ratio fabricated by electrowetting and their application to correlated color temperature tunable light-emitting diodes Open
We develop a facile, fast, and cost-effective method based on the electrowetting effect to fabricate concave microlens arrays (MLA) with a tunable height-to-radius ratio, namely aspect ratio (AR). The electric parameters including voltage …
View article: A High-Energy, 100 Hz, Picosecond Laser for OPCPA Pumping
A High-Energy, 100 Hz, Picosecond Laser for OPCPA Pumping Open
A high-energy diode-pumped picosecond laser system centered at 1064 nm for optical parametric chirped pulse amplifier (OPCPA) pumping was demonstrated. The laser system was based on a master oscillator power amplifier configuration, which …
View article: Highly reflective nanofiber films based on electrospinning and their application on color uniformity and luminous efficacy improvement of white light-emitting diodes
Highly reflective nanofiber films based on electrospinning and their application on color uniformity and luminous efficacy improvement of white light-emitting diodes Open
Based on electrospinning technology, in this study, we fabricated poly(lactic-co-glycolic acid) (PLGA) nanofiber films with high reflectivity and scattering properties. Various films with different thicknesses and fiber diameters were fabr…