A5012687029- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- 2D Materials and Applications
- ZnO doping and properties
- Optical properties and cooling technologies in crystalline materials
- Semiconductor Quantum Structures and Devices
- Ga2O3 and related materials
City University of Hong Kong
2024-2025
Northwestern Polytechnical University
2022-2024
Pure-bromide quasi-2D perovskite (PBQ-2DP) promises high-performance light-emitting diodes (LEDs), while a challenge remains on control over its n-phase distribution for bright true-blue emission. Present work addresses the through exploring passivation molecule of amino acid with reinforced binding energy, which generates narrow preferentially at n = 3 true blue emission 478 nm. Consequently, peak external quantum efficiency 5.52% and record brightness 512 cd m–2 are achieved PBQ-2DP-based...
Abstract 2D Ruddlesden─Popper (RP) halide perovskites are attracting increasing research interest due to their enhanced stability compared 3D perovskites. However, the quantum confinement effect of bulk organic spacers hinders separation and transport photo‐generated carriers. Here, a multiple aromatic ring spacer, 3‐benzothiophene methylammonium (BTMA), is developed for new RP perovskite. The BTMA spacer demonstrated, with significant dipole moment, can impair influence effect, presence S...
Abstract Van der Waals (vdWs) p–n junctions assembled from 2D materials offer enhanced flexibility for creating versatile electronic and optoelectronic devices, attracting significant interest. However, the lack of reliable methods to produce high‐quality p‐type semiconductors, especially patterned channels, remains a major challenge progress in field. Here, precise substitutional doping strategy semiconductors is presented, enabling production millimeter‐scale WS 2 single‐crystal thin films...
Abstract The fabrication of blue perovskite light‐emitting diodes (PeLEDs) in air conditions promises to liberate the manipulation procedures from protection inert atmosphere glovebox, which will remarkably promote commercialization proceeding perovskite‐based optoelectronic devices display applications. However, achieving air‐processed PeLEDs interference moisture meets great challenges crystallization kinetics control. Herein, it is proposed that substrate‐adsorbed dominates during air,...
Perovskites have emerged as a promising new generation of photovoltaic conversion materials, gradually surpassing traditional silicon-based materials in solar cell research. This development is primarily due to their superior power-conversion efficiency (PCE), simple fabrication process, and cost-effective production. However, the low stability perovskite ionic crystals poses significant challenge stability, hindering progress devices. Although two-dimensional (2D) perovskites offer improved...
Shape-controlled nanomaterials are essential to diverse applications in terms of physics, chemistry, and biology due their unique properties. However, the thermodynamic limitation matter inherently prevents variation development shape manipulation based on traditional chemical methods. In this work, we present a strategy laser-induced transient nonequilibrium processes for colloidal perovskite nanocrystals (NCs) synthesis liquid phase. Benefitting from local high temperature pressure induced...
Abstract Metal halide perovskite microwires (MWs) have emerged as promising photoactive materials for highly efficient photodetectors (PDs). However, large‐scale MWs film fabrication is still a formidable challenge achieving integration compatible PDs arrays, owing to precipitation and structure crushing of during deposition annealing. Herein, strategy inch‐scale films presented by depositing intermediate suspension through spray‐coating, which addresses the trade‐off present between high...
Abstract Quasi‐2D perovskite thin films hold great promise for creating highly efficient and stable optoelectronic devices. Regulating the intermediate phase during crystallization is crucial determining film quality, directly impacting device performance. In this study, bifunctional molecule L‐carnitine introduced into quasi‐2D precursor solution to modulate crystallization. The results demonstrate that strong coordination between PbI 2 effectively impedes combination of dimethyl sulfoxide...
Quasi-2D metal halide perovskite is rising for efficient blue light-emitting diodes due to strong quantum confinement and tunable emission, while a challenge remains in its poor stability of n-phase distribution under external stresses. Herein, the stable quasi-2D heat moisture conditions achieved by dual ligand engineering. The Lewis base moieties −SO3− from taurine (3S) bind tightly with edges, inhibiting Ostwald ripening phase caused heat, 3, 3-diphenylpropylamine (DPPA) provides...
Spintronic states-associated photoluminescence (PL) is of interest and essential for electronic spin-manipulated information storage communications. Manganese ions (Mn2+)-doped semiconductor quantum dots (QDs) exhibit a unique PL that comes from the spin-forbidden 4T1–6A1 d–d transition Mn2+, which promising candidate light source. However, interplay yield (PL QY) magnetic states Mn2+ dopants still vague. In this work, we systematically investigate spectroscopic properties Mn2+-doped...
Perovskite light-emitting diodes (PeLEDs) have promised as potential light source device for display. However, interfacial barrier generated from the mismatched band structure of charge transport layer and perovskite, which leads to accumulation low efficiency at interface, resulting in inferior performance true-blue PeLEDs particularly. Herein, we show regulation realized by aqueous compatible alkali cations modification on poly(3,4-ethylene dioxythiophene): poly(styrene sulfonate)...