Chun‐Sing Lee
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View article: Anti-concentration quenching violet-blue TADF OLEDs via indirect conformal distributions tuning in solid-state
Anti-concentration quenching violet-blue TADF OLEDs via indirect conformal distributions tuning in solid-state Open
Controlling conformation distributions is the key to manipulate material properties of multi-conformal molecules. Distinct from previous strategy with direct change or impact on the flexible groups, we tune the conformation distribution th…
View article: Photoluminescence Enhancement in Perovskite Nanocrystals via Compositional, Ligand, and Surface Engineering
Photoluminescence Enhancement in Perovskite Nanocrystals via Compositional, Ligand, and Surface Engineering Open
Perovskite nanocrystals (PeNCs) have attracted considerable interest as promising materials for next-generation optoelectronic devices owing to their high photoluminescence quantum yield, narrow emission linewidths, simple composition tuna…
View article: An “ <i>s</i> ‐Electron” Donor Band Driven Metallic Ferromagnetism in Co‐Doped ZnO Films
An “ <i>s</i> ‐Electron” Donor Band Driven Metallic Ferromagnetism in Co‐Doped ZnO Films Open
Achieving room‐temperature ferromagnetism (RTFM) in diluted magnetic semiconductors (DMSs) has been a long‐standing challenge, with doping transition metals (TM) into oxide semiconductors being one of the most common approaches. However, t…
View article: Aggregation Buffer: Revisiting DropEdge with a New Parameter Block
Aggregation Buffer: Revisiting DropEdge with a New Parameter Block Open
We revisit DropEdge, a data augmentation technique for GNNs which randomly removes edges to expose diverse graph structures during training. While being a promising approach to effectively reduce overfitting on specific connections in the …
View article: Rational Molecular Design of Soluble Carbazole Phosphonic Acid for Hybrid Hole Transport Layers Enabling High‐Efficiency Sky‐Blue Perovskite LEDs
Rational Molecular Design of Soluble Carbazole Phosphonic Acid for Hybrid Hole Transport Layers Enabling High‐Efficiency Sky‐Blue Perovskite LEDs Open
The application of carbazole phosphonic acid (CPA) molecules for interfacial modification in optoelectronic devices is often constrained by poor solubility in non‐polar solvents, limiting their processability. To address this issue, a nove…
View article: Binary Electrolyte Additive‐Reinforced Interfacial Molecule Adsorption Layer for Ultra‐Stable Zinc Metal Anodes
Binary Electrolyte Additive‐Reinforced Interfacial Molecule Adsorption Layer for Ultra‐Stable Zinc Metal Anodes Open
Aqueous zinc ion batteries (AZIBs) face challenges due to the limited interface stability of Zn anode, which includes uncontrolled hydrogen evolution reaction (HER) and excessive dendrite growth. In this study, a natural binary additive co…
View article: Soluble Covalent Organic Frameworks as Efficient Lithiophilic Modulator for High‐Performance Lithium Metal Batteries
Soluble Covalent Organic Frameworks as Efficient Lithiophilic Modulator for High‐Performance Lithium Metal Batteries Open
Lithium metal batteries (LMBs) are regarded as the potential alternative of lithium‐ion batteries due to their ultrahigh theoretical specific capacity (3860 mAh g −1 ). However, severe instability and safety problems caused by the dendrite…
View article: Wet Photolithography From Hydrogen Abstraction of a Quasi‐Orthogonal Aggregation‐Induced Emitter
Wet Photolithography From Hydrogen Abstraction of a Quasi‐Orthogonal Aggregation‐Induced Emitter Open
A new aggregation‐induced emission (AIE) luminogen is obtained by dimerizing acridin‐9(10H)‐one (Ac), an aggregation‐caused quenching (ACQ) effect monomer via an N─N bond and forming 9H,9′H‐[10,10′‐biacridine]‐9,9′‐dione (DiAc) with D 2d s…
View article: Preparation, single-crystal structure and room-temperature phosphorescence of a covalent organic polymer containing Te–O–P bonds
Preparation, single-crystal structure and room-temperature phosphorescence of a covalent organic polymer containing Te–O–P bonds Open
CityU-21, a covalent organic polymer (COP), forms room-temperature phosphorescent (RTP) single-crystals with a stable pseudo-2D framework. It's the first RTP single-crystal COP and remains its crystallinity and RTP character in various sol…
View article: A‐Site Engineering with Thiophene‐Based Ammonium for High‐Efficiency 2D/3D Tin Halide Perovskite Solar Cells
A‐Site Engineering with Thiophene‐Based Ammonium for High‐Efficiency 2D/3D Tin Halide Perovskite Solar Cells Open
Tin halide perovskites are the most promising candidate materials for lead‐free perovskite solar cells (PSCs) thanks to their low toxicity and ideal band gap energies. The introduction of 2D/3D mixed perovskite phases in tin‐based PSCs (TP…
View article: A‐Site Engineering with Thiophene‐Based Ammonium for High‐Efficiency 2D/3D Tin Halide Perovskite Solar Cells
A‐Site Engineering with Thiophene‐Based Ammonium for High‐Efficiency 2D/3D Tin Halide Perovskite Solar Cells Open
Tin halide perovskites are the most promising candidate materials for lead‐free perovskite solar cells (PSCs) thanks to their low toxicity and ideal band gap energies. The introduction of 2D/3D mixed perovskite phases in tin‐based PSCs (TP…
View article: Construction of Through‐Space Charge‐Transfer Nanoparticles for Facilely Realizing High‐Performance NIR‐II Cancer Phototheranostics
Construction of Through‐Space Charge‐Transfer Nanoparticles for Facilely Realizing High‐Performance NIR‐II Cancer Phototheranostics Open
Phototheranostics with second near‐infrared (NIR‐II) emissions show great potential for disease diagnosis and imaging‐guided phototherapy owing to deep tissue penetration, high imaging resolution, and excellent tumor eradication. Recently,…
View article: Graph neural network for neutrino physics event reconstruction
Graph neural network for neutrino physics event reconstruction Open
Liquid argon time projection chamber (LArTPC) detector technology offers a wealth of high-resolution information on particle interactions, and leveraging that information to its full potential requires sophisticated automated reconstructio…
View article: Ultrafast Electron‐Transfer Via Hybrid States at Perovskite/Fullerene Interface
Ultrafast Electron‐Transfer Via Hybrid States at Perovskite/Fullerene Interface Open
Interfacial charge‐transfer between perovskite and charge‐transport layers plays a key role in determining performance of perovskite solar cells. The conventional viewpoint emphases the necessity of favorable energy‐level alignment of the …
View article: A General Strategy for Enhanced Photodynamic Antimicrobial Therapy with Perylenequinonoid Photosensitizers Using a Macrocyclic Supramolecular Carrier
A General Strategy for Enhanced Photodynamic Antimicrobial Therapy with Perylenequinonoid Photosensitizers Using a Macrocyclic Supramolecular Carrier Open
Perylenequinonoid natural products are a class of photosensitizers (PSs) that exhibit high reactive oxygen species (ROS) generation and excellent activity for Type I/Type II dual photodynamic therapy. However, their limited activity agains…
View article: SRBench++: Principled Benchmarking of Symbolic Regression With Domain-Expert Interpretation
SRBench++: Principled Benchmarking of Symbolic Regression With Domain-Expert Interpretation Open
Symbolic regression searches for analytic expressions that accurately describe studied phenomena. The main promise of this approach is that it may return an interpretable model that can be insightful to users, while maintaining high accura…
View article: A Covalent Organic Nanoribbon: Preparation, Single‐Crystal Structure with Chinese Luban Lock Configuration, and Photocatalytic Behavior
A Covalent Organic Nanoribbon: Preparation, Single‐Crystal Structure with Chinese Luban Lock Configuration, and Photocatalytic Behavior Open
The multiple mortise‐and‐tenon joint parts are the core factors to provide the structural stability and diversity of Chinese Luban locks; however, constructing such structures is very challenging. Herein, single crystals of a covalent orga…
View article: Neutral Cyanine: Ultra‐Stable NIR‐II Merocyanines for Highly Efficient Bioimaging and Tumor‐Targeted Phototheranostics
Neutral Cyanine: Ultra‐Stable NIR‐II Merocyanines for Highly Efficient Bioimaging and Tumor‐Targeted Phototheranostics Open
Fluorescence imaging (FLI)‐guided phototheranostics using emission from the second near‐infrared (NIR‐II) window show significant potential for cancer diagnosis and treatment. Clinical imaging‐used polymethine ionic indocyanine green (ICG)…
View article: A General Cyanine‐Based Platform for Designing Robust Dual‐Channel Near‐Infrared Fluorescent and Photoacoustic Probes
A General Cyanine‐Based Platform for Designing Robust Dual‐Channel Near‐Infrared Fluorescent and Photoacoustic Probes Open
The creation of versatile platforms for developing dual‐channel near‐infrared fluorescent (NIRF) and photoacoustic (PA) probes, especially those engineered to minimize channel crosstalk, is crucial for precise biomarker detection. However,…
View article: Counter‐Doping Effect by Trivalent Cations in Tin‐Based Perovskite Solar Cells
Counter‐Doping Effect by Trivalent Cations in Tin‐Based Perovskite Solar Cells Open
Tin (Sn) ‐based perovskite solar cells (PSCs) normally show low open circuit voltage due to serious carrier recombination in the devices, which can be attributed to the oxidation and the resultant high p‐type doping of the perovskite activ…
View article: Stepwise Toward Pure Blue Organic Light‐Emitting Diodes by Synergetically Locking and Shielding Carbonyl/Nitrogen‐Based MR‐TADF Emitters
Stepwise Toward Pure Blue Organic Light‐Emitting Diodes by Synergetically Locking and Shielding Carbonyl/Nitrogen‐Based MR‐TADF Emitters Open
Deep‐blue multi‐resonance (MR) emitters with stable and narrow full‐width‐at‐half‐maximum (FWHM) are of great importance for widening the color gamut of organic light‐emitting diodes (OLEDs). However, most planar MR emitters are vulnerable…
View article: Imbalanced Surface Charge Induced Phase Segregation in Mixed Halide Perovskites
Imbalanced Surface Charge Induced Phase Segregation in Mixed Halide Perovskites Open
Alloying the metal halide perovskite composition has become a key strategy for engineering the optoelectronic properties for various applications. However, the difference in complexation between ions poses a threat to crystal stability. In…
View article: Three Decades of Materials Research Excellence at CityU: A Special Issue Dedicated to the 30th Anniversary of City University of Hong Kong
Three Decades of Materials Research Excellence at CityU: A Special Issue Dedicated to the 30th Anniversary of City University of Hong Kong Open
To commemorate the 30th anniversary of the City University of Hong Kong (CityU), this special issue features CityU's state-ofthe-art interdisciplinary research at the frontiers of materials science and engineering
View article: Oxygen‐Activated Boron Nitride for Selective Photocatalytic Coupling of Methanol to Ethylene Glycol
Oxygen‐Activated Boron Nitride for Selective Photocatalytic Coupling of Methanol to Ethylene Glycol Open
The controllable photocatalytic C−C coupling of methanol to produce ethylene glycol (EG) is a highly desirable but challenging objective for replacing the current energy‐intensive thermocatalytic process. Here, we develop a metal‐free poro…