A5010566487- Perovskite Materials and Applications
- Solid-state spectroscopy and crystallography
- Quantum Dots Synthesis And Properties
- Luminescence Properties of Advanced Materials
- Optical properties and cooling technologies in crystalline materials
- Organic Light-Emitting Diodes Research
- Analysis of environmental and stochastic processes
- Conducting polymers and applications
- Railway Engineering and Dynamics
- Stochastic processes and financial applications
- Microgrid Control and Optimization
- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Brake Systems and Friction Analysis
- Vehicle Dynamics and Control Systems
- Chalcogenide Semiconductor Thin Films
- Mathematical Approximation and Integration
Beijing Jiaotong University
2017-2023
Liaoning Technical University
2023
Wuhan University
2020
Lead halide perovskite materials are thriving in optoelectronic applications due to their excellent properties, while instability the fact that they easily hydrolyzed is still a bottleneck for potential application. In this work, water-resistant, monodispersed and stably luminescent cesium lead bromine nanocrystals coated with CsPb2Br5 were obtained using modified non-stoichiometric solution-phase method. 2D layers on surface of CsPbBr3 formed core-shell-like structure synthetic processes....
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are promising materials due to their excellent optoelectronic properties. In this work, we show a successful partial and reversible cation exchange reaction between Pb Mn in both CsPbCl3 NCs CsMnCl3 systems yield luminescent CsPb1–xMnxCl3 NCs. By adjusting the time, photoluminescence from exciton emission of electron transition Mn2+ can be tuned gradually. This work highlights feasibility postsynthetic interconversion Pb2+ cesium lead...
CsPbCl3:Mn2+ is a practical solution for obtaining red-orange light inorganic perovskite nanocrystals since CsPbI3 unstable. Increasing the concentration of Mn2+ an effective way to enhance orange-red emission CsPbCl3:Mn2+. However, relationship between intensity dopant and very chaotic in different studies. As transition metal ion, electronic states are sensitive crystal field environment. Here, was adjusted by co-doping other cations, remained unchanged. Additionally, strength samples...
It is still quite challenging to achieve high-performance and stable blue perovskite materials due their instability degradation. The lattice strain provides an important pathway investigate the degradation process. In this article, in nanocrystals was regulated by ratio of Cs+, EA+, Rb+ cations with different sizes. Their electrical structure, formation energy, ion migration activation energy were calculated density functional theory (DFT) method. luminescence properties stability lead...
CsPbX3 (X = Cl, Br, I) perovskite nanocrystals (NCs) are promising materials due to their excellent optoelectronic properties. This work shows a successful anion exchange reaction in CsPbBr3 nanowire (NW) systems with HCl gas resulting blue-green light-emitting CsPbBr3@CsPbBr3-x Cl x core-shell heterojunction. By adjusting the time and temperature, structure light emission of NWs can be adjusted. The heterojunction NCs stably luminescent 24 h. rational mechanism is also investigated....
A novel high concentration doping method, Cs<sub>4</sub>PbBr<sub>6</sub> reacting with MBr<sub>2</sub> (ZnBr<sub>2</sub>, MnBr<sub>2</sub>, EuBr<sub>2</sub>) and transforming to CsPb<sub>x</sub>M<sub>1−x</sub>Br<sub>3</sub> nanocrystals, was developed.
Inorganic lead halide perovskite nanocrystals (NCs) with superior photoelectric properties are expected to have excellent performance in many fields. However, the anion exchange changes their features and is unfavorable for applications Hence, impeding important improving composition stability of inorganic NCs. Herein, CsPb X 3 ( = Cl, Br) NCs coated Cs 4 Pb 6 shell impede reduce mobility. The facily fabricated on through high temperature injection method. Anion experiments demonstrate that...
Abstract The photostability issue of CsPbX 3 (X = Cl, Br, I) quantum dots (QDs) is one the key origins for degradation their luminescence performance, which hinders application in lighting and displays. Herein, we report a new method combining doping ligand engineering, effectively improves CsPbBr QDs performance QD light-emitting diodes (QLEDs). In this method, ZnBr 2 doped into to reduce surface anion defects; didodecyldimethyl ammonium bromide (DDAB) tetraoctylammonium (TOAB) hybrid...
The stable cross-shaped CsPbI3 nanoplates (NPs) with red emission were achieved by chemical synthesis the assistance of YCl3. Y3+ replacing Pb2+ results in anisotropic growth nanocrystal to form NPs. Four corners NPs dissolved, thus forming was shifted from near-infrared (690 nm) (640 as dopant amount increased. widens width bandgap, which is also proved first-principles calculations. In addition, Cl– passivated surface defects NPs, suppressing nonradiative recombination. showed remarkable...
A novel ligand-exchange strategy aimed at improving CsPbI3 Nanocrystals (NCs) optical properties and stability was demonstrated by introducing multidentate chelating ligands, Ethylenediaminetetraacetic Acid (EDTA) Glutathione (GSH) with a solid-liquid reaction. light-emitting device in which the E+G treated NCs acted as emission layer fabricated. After ligand-exchange, great improvement both photoluminescence (PL) electroluminescence (EL) performance around 682nm observed, shows trap state...