Kam Sing Wong
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View article: Feeling Drained at Work? The Effects of Workplace Incivility Among Frontline Restaurant Employees
Feeling Drained at Work? The Effects of Workplace Incivility Among Frontline Restaurant Employees Open
Although previous studies have highlighted the adverse effects of job burnout on organizational outcomes, the contributing factors to employee burnout have been relatively overlooked. This study aims to investigate how workplace incivility…
View article: Inverted Device Engineering for Efficient and Bright Quantum Rod LEDs
Inverted Device Engineering for Efficient and Bright Quantum Rod LEDs Open
Quantum dot light‐emitting diodes (QD‐LEDs) have approached the theoretical limit of external quantum efficiency (EQE) determined by outcoupling efficiency. To achieve further improvements, novel optical designs must be explored, such as c…
View article: Precise Modulation of Reorganization Energy through Methyl Substitution for High Performance Organic Solar Cells
Precise Modulation of Reorganization Energy through Methyl Substitution for High Performance Organic Solar Cells Open
Efficient charge transport and minimized energy loss are critical for advancing the performance of organic solar cells (OSCs). In this study, a series of quinoxaline‐based electron acceptors, BQx‐MeF, BQx‐MeCl, and BQx‐MeBr, featuring meth…
View article: Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites
Photoluminescence and Stability of 2D Ruddlesden–Popper Halide Perovskites Open
Two-dimensional lead halide perovskites are of significant interest for a variety of practical applications. However, the relationships between their composition and properties are not fully clear. Here we investigated photoluminescence fr…
View article: Volumetric Criteria and An Automated Assessment Tool Development for Optimizing Building Permeability Design in High-Density Urban Environments
Volumetric Criteria and An Automated Assessment Tool Development for Optimizing Building Permeability Design in High-Density Urban Environments Open
Better urban ventilation can significantly contribute to achieving UN SDGs through better liveability for sustainable cities and communities (SDG 11), better air quality for health and well-being (SDG 3), and more climate-responsive buildi…
View article: Extreme potential photocatalysis enabled by spin-exchange Auger processes in magnetic-doped quantum dots
Extreme potential photocatalysis enabled by spin-exchange Auger processes in magnetic-doped quantum dots Open
Visible-light-absorbing semiconductor nanocrystals have shown great promise as photocatalysts for promoting photoredox chemistry. However, their utilization in organic synthesis remains considerably limited compared to small molecule photo…
View article: A new building ventilation assessment tool for high-density urban areas: integrating the least cost path method into building permeability parametrization
A new building ventilation assessment tool for high-density urban areas: integrating the least cost path method into building permeability parametrization Open
Evaluating building air ventilation performance is critical in Hong Kong’s densely populated, high-rise urban environments. Traditional methods, such as wind tunnel testing and Computational Fluid Dynamics (CFD) simulations, are often time…
View article: Niobium Oxide for Microplastics Degradation—the Effect of Crystal Structure and Morphology
Niobium Oxide for Microplastics Degradation—the Effect of Crystal Structure and Morphology Open
Microplastic (MP) pollution is ubiquitous in the environment and there is a significant need for the development of photocatalysts for environmental remediation of microplastic pollution. Herein, the effect of the structure and morphology …
View article: Blade‐Coating with Engineered Evaporation Kinetics Enables Scalable Perovskite Photovoltaics with Minimal Efficiency Loss
Blade‐Coating with Engineered Evaporation Kinetics Enables Scalable Perovskite Photovoltaics with Minimal Efficiency Loss Open
The blade‐coating method has become an important technology that can be expanded to manufacture perovskite solar photovoltaics. However, the inherent conflict between rapid solvent removal and crystallization control in ambient blade‐coati…
View article: Multifunctional Universal Additive for Stable and Efficient Inverted Perovskite Solar Cells
Multifunctional Universal Additive for Stable and Efficient Inverted Perovskite Solar Cells Open
The performance of perovskite solar cells has significantly improved over the years in part due to defect passivation in the bulk and at the interfaces. While many additive molecules have been reported in the literature, they are commonly …
View article: Photoluminescence and Stability of Dion–Jacobson Tin-Based Halide Perovskites with Different Spacer Cation Chain Length
Photoluminescence and Stability of Dion–Jacobson Tin-Based Halide Perovskites with Different Spacer Cation Chain Length Open
Two-dimensional tin halide perovskites are of significant interest for light emitting applications. Here, we investigate the effect of organic cation A on the stability of different Dion–Jacobson tin-based halide perovskites. The ASnBr4 ma…
View article: Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency
Coplanar Dimeric Acceptors with Bathochromic Absorption and Torsion‐Free Backbones through Precise Fluorination Enabling Efficient Organic Photovoltaics with 18.63% Efficiency Open
Giant dimeric acceptors (GDAs), a sub‐type of acceptor materials for organic solar cells (OSCs), have garnered much attention due to the synergistic advantages of their monomeric and polymeric acceptors, forming a well‐defined molecular st…
View article: Green Spin Light-Emitting Diodes Enabled by Perovskite Nanocrystals <i>in Situ</i> Modified with Chiral Ligands
Green Spin Light-Emitting Diodes Enabled by Perovskite Nanocrystals <i>in Situ</i> Modified with Chiral Ligands Open
Spin-polarized light-emitting diodes (spin-LEDs) hold promise for next-generation technologies across optical communication, biological imaging, and quantum information processing. Chiral metal halide perovskites, which combine advantageou…
View article: Improved efficiency and stability of outdoor and indoor organic photovoltaics with suppressed voltage loss <i>via</i> alkoxylation on dimeric giant acceptors featured as supramolecular stabilizers
Improved efficiency and stability of outdoor and indoor organic photovoltaics with suppressed voltage loss <i>via</i> alkoxylation on dimeric giant acceptors featured as supramolecular stabilizers Open
Alkoxylated dimeric giant acceptor DYO-V boosts organic solar cell efficiency and stability, achieving 20.2% PCE outdoors and 28.1% indoors, offering a versatile strategy for durable, high-performance photovoltaics.
View article: Large-area single-crystal indium phosphide laterally grown on patterned silicon-on-insulator
Large-area single-crystal indium phosphide laterally grown on patterned silicon-on-insulator Open
Selective area heteroepitaxy provides an alternate solution for the monolithic integration of high-performance III-V lasers on Si with effective management of crystalline defects. Here, we report large-area single-crystal InP grown on (001…
View article: Robust Plasma‐Assisted Growth of 2D Janus Transition Metal Dichalcogenides and Their Enhanced Photoluminescent Properties
Robust Plasma‐Assisted Growth of 2D Janus Transition Metal Dichalcogenides and Their Enhanced Photoluminescent Properties Open
Janus transition metal dichalcogenides (TMDs) are a novel class of 2D materials with unique mirror asymmetry. Plasma‐assisted synthesis at room temperature is favored for producing Janus TMDs due to its energy efficiency and prevention of …
View article: Intense Circular Dichroism and Spin Selectivity in AgBiS<sub>2</sub> Nanocrystals by Chiral Ligand Exchange
Intense Circular Dichroism and Spin Selectivity in AgBiS<sub>2</sub> Nanocrystals by Chiral Ligand Exchange Open
Chiral semiconducting nanomaterials offer many potential applications in photodetection, light emission, quantum information, and so on. However, it is difficult to achieve a strong circular dichroism (CD) signal in semiconducting nanocrys…
View article: Molecular Control of the Donor/Acceptor Interface Suppresses Charge Recombination Enabling High‐Efficiency Single‐Component Organic Solar Cells
Molecular Control of the Donor/Acceptor Interface Suppresses Charge Recombination Enabling High‐Efficiency Single‐Component Organic Solar Cells Open
Single‐component organic solar cells based on double cable polymers have achieved remarkable performance, with DCPY2 reaching a high efficiency of over 13%. In this study, DCPY2 is further optimized with an efficiency of 13.85%, maintainin…
View article: Experimental Demonstration of Collective Photonic Nanojet Generated by Densely Packed Arrays of Dielectric Microstructures
Experimental Demonstration of Collective Photonic Nanojet Generated by Densely Packed Arrays of Dielectric Microstructures Open
Uncovering new ways for light localization at the micro‐ and nanoscale is essential for the development of state‐of‐the‐art photonic devices. Nowadays the most advances in this area are achieved using near‐field resonators, providing extre…
View article: Bottom Contact Engineering for Ambient Fabrication of >25% Durable Perovskite Solar Cells
Bottom Contact Engineering for Ambient Fabrication of >25% Durable Perovskite Solar Cells Open
The bottom contact in perovskite solar cells (PSCs) is easy to cause deep trap states and severe instability issues, especially under maximum power point tracking (MPPT). In this study, sodium gluconate (SG) is employed to disperse tin oxi…
View article: Red‐Emitting CsPbI<sub>3</sub>/ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability
Red‐Emitting CsPbI<sub>3</sub>/ZnSe Colloidal Nanoheterostructures with Enhanced Optical Properties and Stability Open
Producing heterostructures of cesium lead halide perovskites and metal‐chalcogenides in the form of colloidal nanocrystals can improve their optical features and stability, and also govern the recombination of charge carriers. Herein, the …
View article: Tailoring Cyano Substitutions on Quinoxaline‐based Small‐Molecule Acceptors Enabling Enhanced Molecular Packing for High‐Performance Organic Solar Cells
Tailoring Cyano Substitutions on Quinoxaline‐based Small‐Molecule Acceptors Enabling Enhanced Molecular Packing for High‐Performance Organic Solar Cells Open
Cyanation is a common chemical modification strategy to fine‐tune the energy levels and molecular packing of organic semiconductors, especially materials used in organic solar cells (OSCs). Generally, cyanation is used to modify the end gr…
View article: Solvent‐Induced Bright Emission in Lead‐Free Organic–Inorganic Antimony Bromides with Reversible Transformation
Solvent‐Induced Bright Emission in Lead‐Free Organic–Inorganic Antimony Bromides with Reversible Transformation Open
Lead‐free low‐dimensional organic–inorganic metal halides have gained increasing attention in a wide range of applications due to their low toxicity, outstanding optical performance, and structural tunability. In this work, a general metho…
View article: Removing Cadmium Impurities from Cation‐Exchange‐Derived CuInSe<sub>2</sub>/CuInS<sub>2</sub> Nanorods for Enhanced Infrared Emission and Photodetection
Removing Cadmium Impurities from Cation‐Exchange‐Derived CuInSe<sub>2</sub>/CuInS<sub>2</sub> Nanorods for Enhanced Infrared Emission and Photodetection Open
Metal chalcogenide nanocrystals with variable composition and shape can conveniently be produced using cation exchange synthesis; however, the presence of cation‐containing ligands inherited from the starting material often results in cont…
View article: Selenium substitution for dielectric constant improvement and hole-transfer acceleration in non-fullerene organic solar cells
Selenium substitution for dielectric constant improvement and hole-transfer acceleration in non-fullerene organic solar cells Open
Dielectric constant of non-fullerene acceptors plays a critical role in organic solar cells in terms of exciton dissociation and charge recombination. Current acceptors feature a dielectric constant of 3-4, correlating to relatively high r…
View article: Strongly Confined and Spectrally Tunable CsPbBr<sub>3</sub> Quantum Dots for Deep Blue QD‐LEDs
Strongly Confined and Spectrally Tunable CsPbBr<sub>3</sub> Quantum Dots for Deep Blue QD‐LEDs Open
Despite recent advances, it is still difficult to fabricate deep blue‐emitting perovskite light‐emitting diodes (LEDs) that are immune to the color instability caused by halide mixing. This is largely because it is still challenging to ach…