A5002217361- Luminescence Properties of Advanced Materials
- Perovskite Materials and Applications
- Luminescence and Fluorescent Materials
- Fusion materials and technologies
- Hydrogen embrittlement and corrosion behaviors in metals
- Carbon Dioxide Capture Technologies
- Gas Sensing Nanomaterials and Sensors
- Microstructure and mechanical properties
- Chemical Looping and Thermochemical Processes
- Microstructure and Mechanical Properties of Steels
- Advanced Photocatalysis Techniques
- Magnesium Oxide Properties and Applications
- Radiation Detection and Scintillator Technologies
- Catalytic Processes in Materials Science
- Nuclear materials and radiation effects
- Quantum Dots Synthesis And Properties
- Layered Double Hydroxides Synthesis and Applications
- MXene and MAX Phase Materials
- Nuclear Materials and Properties
- Machine Learning in Materials Science
- Solid State Laser Technologies
- Superconductivity in MgB2 and Alloys
- Aluminum Alloys Composites Properties
- 2D Materials and Applications
- Ion-surface interactions and analysis
University of Science and Technology Beijing
2015-2024
Broadband near-infrared (NIR) phosphors are the critical component of phosphor converted NIR light-emitting diode (LED) light sources. However, there still a lack with excellent external quantum efficiency (EQE) and thermal stability. Here, we report highly efficient broadband Y3Ga3MgSiO12: Cr3+. The optimized yields an internal (IQE) EQE 79.9 33.7%, respectively. integrated emission intensity remains at 84.4% that room temperature when heated to 423 K. A LED lamp was made by combining...
Ce-doped garnet phosphors play an important role in the white light-emitting diode (LED) family. In past years, a lot of trial-and-error experiments guided by experience to discover suitable for LEDs have been presented. The working temperature may reach 200 °C LEDs, and so, exploration with excellent thermal stability at desired wavelength continues be challenge. present study, novel cyan-green garnet:Ce phosphors, machine learning models were built constructing reasonable features. Among...
High-efficiency long-wavelength emission near-infrared (NIR) phosphors are the key to next-generation LED light sources. However, high-efficiency usually exhibit narrow-band at shorter wavelengths due crystal field intensity. In this paper, we utilize multi-objective optimization discover NIR phosphor Gd3Mg0.5Al1.5Ga2.5Ge0.5O12:0.04Cr3+. It exhibits a broadband from 650 1100 nm peaking 763 nm, with full width half maximum (FWHM) of 150 an internal quantum efficiency (IQE)/external (EQE)...
Abstract To realize efficient and broadband near infrared (NIR) light in both NIR‐I NIR‐II regions, Gd 3 Mg 0.5 Al 1.5 Ga 2.5 Ge O 12 (GMAGG): Cr 3+ , Yb Ni 2+ phosphors are prepared this study. The effects of ‐Yb co‐doping ‐Ni tri‐doping on the luminescence properties investigated. GMAGG: exhibits high internal quantum efficiency (IQE) 96.4%, near‐zero thermal quenching (96.5%@423 K) 650–1100 nm. By constructing energy transfer from to emission range is further extended 650–1700 nm with a...
Modulation of the octahedral crystal field environment Cr3+ is an effective approach to achieve tunable emission. Here, we prepared a series broadband MP3O9:Cr3+ (M = Al, Ga, In) near-infrared (NIR) phosphors, and cubic AlP3O9:Cr3+ (APO-c:Cr3+) monoclinic (APO-m:Cr3+) phosphors were by controlling synthesis temperature. The emission wavelength was tuned from 787 nm for APO-c:Cr3+ 894 InP3O9:Cr3+ (IPO:Cr3+) regulating M ion reducing intensity. Excitingly, family shows excellent thermal...
In this paper, we investigated the interaction of an edge dislocation with Cu precipitates a spherical geometry and Cu?Ni that possess core outer Ni shell, commonly observed in reactor pressure vessel (RPV) steels. We applied molecular dynamics techniques to explore critical stress required unpin (CSRUD), breakaway line shape when leaves transition atoms within precipitates. The results indicate CSRUD diameter less than 2.38?nm is larger contain same number atoms, while for 2.38?nm, weaker,...
In this paper, we employed both molecular statics and dynamics simulation methods to investigate the role of vacancies in formation phase transition Cu-rich precipitates α-iron. The results indicated that promoted diffusion Cu atoms form precipitates. After formed, they further trapped vacancies. supersaturated vacancy concentration precipitate induced a shear strain, which triggered from bcc fcc structure by transforming initial (110) plane into (111) plane. addition, fcc-twin stacking...
Developing novel broadband near-infrared (NIR) phosphors is crucial to promote NIR phosphor-converted light emitting diodes (pc-LEDs) development. In this work, a new ultra-broadband Gd3MgScGa2SiO12:Cr3+ (GMSGS) phosphor was achieved by replacing Sc3+-Ga3+ in Gd3Sc2Ga3O12 with Mg2+-Si4+. Under the excitation of blue light, peak wavelength GMSGS: 0.04Cr3+ about 820 nm full width at half maximum (FWHM) ∼180 and an internal quantum efficiency (IQE) 50%. After co-doping Yb3+,an (FWHM = 300 nm)...