A5103202574- Luminescence Properties of Advanced Materials
- Optical Wireless Communication Technologies
- Perovskite Materials and Applications
- Radiation Detection and Scintillator Technologies
- Advanced Photocatalysis Techniques
- GaN-based semiconductor devices and materials
- Microwave Dielectric Ceramics Synthesis
- Advanced Photonic Communication Systems
- Image Enhancement Techniques
- Semiconductor Quantum Structures and Devices
- Anomaly Detection Techniques and Applications
- Adversarial Robustness in Machine Learning
- Ammonia Synthesis and Nitrogen Reduction
- Fault Detection and Control Systems
- Advanced Fiber Optic Sensors
- Inorganic Chemistry and Materials
- Ocular and Laser Science Research
- Solid-state spectroscopy and crystallography
- Photorefractive and Nonlinear Optics
- Advanced Semiconductor Detectors and Materials
- Ga2O3 and related materials
- Nuclear materials and radiation effects
- Semiconductor Lasers and Optical Devices
- Advanced Optical Imaging Technologies
- Impact of Light on Environment and Health
Guangdong Academy of Sciences
2020-2023
Institute of Semiconductors
2006-2023
Guangdong Institute of Intelligent Manufacturing
2017-2021
South China Normal University
2019
State Council of the People's Republic of China
2018
Chinese Academy of Sciences
2006
Energy migration (energy transfer among identical luminescence centers) is always thought to be related the concentration quenching in materials. However, novel Eu3+-doped Ba6Gd2Ti4O17 phosphor seems an exception. In series of Ba6Gd2(1- x)Ti4O17: xEu3+ ( x = 0.1, 0.3, 0.5, 0.7, and 0.9) phosphors prepared investigated, no found. Detailed investigations crystal structure properties reveal that nonoccurrence dimensional restriction energy inside lattices. Ba6Gd2Ti4O17, directly increasing...
Eu3+ ion can be effectively sensitized by Ce3+ through an energy-transfer chain of Ce3+-(Tb3+) n-Eu3+, which has contributed to the development white light-emitting diodes (WLEDs) as it favor more efficient red phosphors. However, simply serving for WLEDs one multicomponents, design n-Eu3+ energy transfer is undoubtedly underused. Theoretically, light achieved with extra blue and green emissions released from Tb3+. Herein, based on these three multicolor luminescence centers been realized in...
MgF<sub>2</sub> assisted delicate synthesis and application of a bright moisture-resistant LAG:Mn<sup>4+</sup>,Mg<sup>2+</sup> phosphor.
Energy-transfer-based multi-colour emissions in YGa<sub>1.5</sub>Al<sub>1.5</sub>(BO<sub>3</sub>)<sub>4</sub>:Tb<sup>3+</sup>,Eu<sup>3+</sup> for WLEDs.
A series of Ca3Y(GaO)3(BO3)4:Tb3+,Eu3+ phosphors were prepared by a high-temperature solid-state reaction. Their phase structures confirmed powder X-ray diffraction and the element distribution was measured using transmission electron microscopy elemental mapping. The photoluminescence emission excitation spectra fluorescence lifetime studied discussed in detail. results revealed that Eu3+ ions can be efficiently sensitized Tb3+ under near-UV excitation. In addition, energy transfer...
A single phase color-tunable white light emitting Ca<sub>8</sub>ZnLu(PO<sub>4</sub>)<sub>7</sub>:Eu<sup>2+</sup>,Mn<sup>2+</sup> phosphor with high color rendering index has been rationally designed <italic>via</italic> combination of cyan and red emissions.
As a potential far-red-emitting candidate for plant growth LEDs, Mn4+ activated oxide phosphors have brand-new application prospects. However, it remains significant challenge to develop highly efficient due their intrinsic energy loss in large Stokes shift. Herein, we present rational charge compensation strategy with fusible compensator MgF2 at the molecular level synthesize LaAlO3:Mn4+,Mg2+ phosphor. Notably, can play an essential role incorporation of into crystal matrix during...
Abstract During pursuing high color rendering index for full‐color‐emitting phosphor, low quantum efficiency (QE) is usually accompanying. We intend to elevate the luminescence when realizing a solar‐like spectra distribution, by constructing apatite structure oxynitride, inheriting covalence and rigidity from suitable multiple cation sites oxyapatite compounds. Full‐color‐emitting oxynitride phosphor (Mg,Y) 5 Si 3 (O,N) 13 :Ce 3+ ,Mn 2+ has been prepared, crystal sites’ occupancies of...
A single-component white phosphor with a high color rendering index (<italic>R</italic><sub>a</sub>= 82.2) and good stability was achieved by nonequivalent doping as the proposed strategy, which induces B-site disordering compensates intrinsic oxygen defects of SZN.
Dual camera is becoming increasingly prevalent among smartphone schemes these days. This paper demonstrates a system prototype by using the color and monochrome cameras on one simultaneously for visible light communication. To achieve this, we propose novel dual-modulation scheme. The baseband signal firstly modulated ratio modulation-color shift keying (CRM-CSK) to broadcast information that can be distinguished camera. Next it, gray level modulation (GLM) utilized generate CRM symbols with...
Rapid thermal annealing (RTA) has been demonstrated as an important way to improve the crystal quality of GaInNAs(Sb)/GaAs quantum wells. However little investigation made into their application in laser growth, especially at a wavelength 1.55 µm. When GaAs-based is grown, AlGaAs usually used for cladding layers. The growth p-cladding layer takes 30–45 min temperature higher than that GaInNAs(Sb) active region, which affects material quality. To investigate this effect, various post-growth...
Large vision models have been found vulnerable to adversarial examples, emphasizing the need for enhancing their robustness. While training is an effective defense deep convolutional models, it often faces scalability issues with large due high computational costs. Recent approaches propose robust fine-tuning methods, such as tuning of low-rank adaptation (LoRA) in but they still struggle match accuracy full parameter fine-tuning. The integration various mechanisms offers a promising...
Despite extensive research on received signal strength (RSS)-based visible light positioning (VLP), the receiver (RX) is assumed to stand vertically during process in most reported system designs. In this work, we propose a strategy using deep neural network (DNN) trained by synthetic data address problem. We further explicitly state deficiencies current RSS-VLP algorithms when handling problems involving RX orientation. Compared with existing algorithms, our method can achieve high accuracy...
Abstract This paper presents a real‐time OFDM‐based visible light communication (VLC) system utilizing single InGaN/GaN multiquantum‐wells (MQWs) emitting diode (LED). An MQWs LED with 3 dB electrical bandwidth of 23.8 MHz is developed as the transmitting device. Orthogonal frequency division multiplexing (OFDM) employed to ensure fully used, and designed implemented on field‐programmable gate array platform realize communication. The OFDM‐VLC achieves rate 96 Mbit/s at distance 2 m, bit...