A5055408533- Perovskite Materials and Applications
- Luminescence Properties of Advanced Materials
- Radiation Detection and Scintillator Technologies
- Quantum Dots Synthesis And Properties
- Atomic and Subatomic Physics Research
- Solid-state spectroscopy and crystallography
- Luminescence and Fluorescent Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Medical Imaging Techniques and Applications
- Nanoplatforms for cancer theranostics
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Molecular Sensors and Ion Detection
- Organic Light-Emitting Diodes Research
- Polyoxometalates: Synthesis and Applications
- Organoboron and organosilicon chemistry
- Optimal Power Flow Distribution
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical properties and cooling technologies in crystalline materials
- Photodynamic Therapy Research Studies
- Crystal Structures and Properties
- Power System Reliability and Maintenance
- Metal-Organic Frameworks: Synthesis and Applications
Beijing University of Technology
2021-2025
Guangxi University
2023-2025
Beijing Institute of Technology
2017-2019
ETH Zurich
2017
Peking University
2012-2016
Beijing National Laboratory for Molecular Sciences
2013-2016
University of Hong Kong
2012-2016
State Key Laboratory of Rare Earth Materials Chemistry and Application
2012-2016
Upconversion (UC) process in lanthanide-doped nanomaterials has attracted great research interest for its extensive biological applications vitro and vivo, benefiting from the high tissue penetration depth of near-infrared excitation light low autofluorescence background. However, 980 nm laser, typically used to trigger Yb(3+)-sensitized UC process, is strongly absorbed by water structures could cause severe overheating effect. In this article, we report extension spectrum shorter...
Upconversion luminescent nanoparticles (UCNPs) have been widely used in many biochemical fields, due to their characteristic large anti-Stokes shifts, narrow emission bands, deep tissue penetration and minimal background interference. UCNPs-derived multifunctional materials that integrate the merits of UCNPs other functional entities also attracted extensive attention. Here this paper we present a core–shell structured nanomaterial, namely, NaGdF4:Yb,Er@CaF2@SiO2-PS, which is fields...
Monotonous luminescence has always been a major factor limiting the application of organic room-temperature phosphorescence (RTP) materials. Enhancing and regulating intermolecular interactions between host guest is an effective strategy to achieve excellent performance. In this study, halogen bonding (CN⋅⋅⋅Br) was introduced into host-guest RTP system. The interaction promoted intersystem crossing stabilized triplet excitons, thus helping strong emission. addition, weak sensitive external...
Flexible scintillator screens with environmental stability, high sensitivity, and low cost have emerged as candidates for X-ray imaging applications. Here, a large-scale cost-efficient solution synthesis of the vacancy-ordered double perovskite Cs2 ZrCl6 , which is characterized by thermal activation delayed fluorescence (TADF) dominated triplet emission under irradiation, demonstrated. The large Stokes shift efficient luminescence collection TADF effectively ensure light outcoupling...
Abstract Low‐dimensional perovskite halides have shown a great potential as X‐ray detection materials because of efficient exciton emissions originating from strongly spatially localized charge carriers. Nonetheless, most them scintillation yield far below their theoretical limits. Here, it is found that the harvesting efficiency produced carriers can be significantly enhanced via small amount In + doping in these highly structures. A bright and sensitive zero‐dimensional Cs 3 Cu 2 I 5 :In...
The low efficiency triplet emission of hybrid copper(I) iodide clusters is a critical obstacle to their further practical optoelectronic application. Herein, we present an efficient cluster emitter (DBA)4 Cu4 I4 , where the cooperation excited state structure reorganization and metallophilicity interaction enables ultra-bright yellow-orange with photoluminescence quantum yield over 94.9 %, phonon-assisted de-trapping process exciton induces negative thermal quenching effect at 80-300 K. We...
Upconversion emissions from rare-earth nanoparticles have attracted much interest as potential biolabels, for which small particle size and high emission intensity are both desired. Herein we report a facile way to achieve NaYF(4):Yb,Er@CaF(2) (NPs) with (10-13 nm) highly enhanced (ca. 300 times) upconversion compared the pristine NPs. The CaF(2) shell protects ions leaking, when exposed buffer solution, ensures biological safety bioprobe applications. With NPs, HeLa cells were imaged low...
Active center engineering at atomic level is a grand challenge for catalyst design and optimization in many industrial catalytic processes. Exploring new strategies to delicately tailor the structures of active centers bonding modes surface reactive intermediates nanocatalysts crucial high-efficiency nanocatalysis that bridges heterogeneous homogeneous catalysis. Here we demonstrate robust approach tune CO oxidation activity over CeO2 nanowires (NWs) through modulation local structure state...
Efficient tailoring of upconversion emissions in lanthanide-doped nanocrystals is great significance for extended optical applications. Here, we present a facile and highly effective method to tailor the selectivity by engineering local structure lanthanides Na(x)REF(3+x) nanocrystals. The was achieved through precisely tuning composition nanocrystals, with different [Na]/[RE] ([F]/[RE]) ratio. It found that lattice parameter as well coordination number symmetry changed composition. A...
Pd NPs with a porous structure exhibit enhanced near infrared (NIR) absorption and photothermal effect compared to nanocubes similar size, show very high efficacy in ablation of HeLa cells.
Abstract The halide perovskite (PVSK) materials (with ABX 3 formulation) have emerged as “dream materials” for photovoltaic (PV) applications due to their remarkable physical properties such high optical absorption coefficient, carrier mobility, long diffusion lengths, etc. These enabled the PV devices reach higher than 20% power conversion efficiencies (PCE) in record time. further pursuit of PCE and improved stability brings forth increasing interests so‐called “mixed composition” PVSK...
Progress towards high performance X-ray detection and dynamic imaging applications, including nondestructive inspection, homeland security, medical diagnostics, requires scintillators with a light yield, reasonable decay time, low cost, eco-friendliness. Recently, copper halide have drawn tremendous attention due to their outstanding radioluminescence performance. Here, we first employed β-Cs3Cu2Cl5 as high-performance scintillator, photoluminescence quantum yield (PLQY) of 94.6%, 34 000 ±...
Abstract Lead‐based halide perovskite nanomaterials with excellent optical properties have aroused great attention in the fields of solar cells, light‐emitting diodes, lasing, X‐ray imaging, etc. However, toxicity lead prompts researchers to develop alternatives cut down usage lead. Herein, all‐inorganic manganese‐based derivatives, CsMnCl 3 nanocrystals (NCs), uniform size and morphology been synthesized successfully via a modified hot‐injection method. These NCs direct bandgap 4.08 eV...
We report a Mn2+-activated all-inorganic 2D layered Ruddlesden–Popper (RP) perovskite Cs2CdCl4 single crystal as highly efficient and stable X-ray scintillator. The Cs2CdCl4:10% Mn achieves bright orange-red emission with photoluminescence quantum yield up to 90.47%, good environmental stability, decent thermal quenching resistance. As scintillator, shows strong absorption, ultrahigh light 88138 photons/MeV, low detection limit of 31.04 nGyair/s. A 15 × cm flexible scintillation screen is...
Abstract Portable X‐ray imaging technology plays a crucial role in enabling prompt diagnosis and treatment outdoors. Nevertheless, the persistent challenge of external optical signal crosstalk poses significant bottleneck to its advancement. Herein, solution utilizing near‐infrared (NIR) light effectively mitigate is proposed, thereby demonstrating feasibility portable even under ambient light. A series rare earth ions doped Cs 2 Ag x Na 1‐x In y Bi 1‐y Cl 6 halide scintillators reported,...
Abstract Inorganic scintillators play a pivotal role in diverse fields like medical imaging, nondestructive detection, homeland security, and high‐energy physics. However, traditional inorganic encounter challenges such as high fabrication costs low light yield. Recently, low‐dimensional metal halide (LDMHS) have witnessed rapid progress, owing to their distinctive crystal structure superior radioluminescence performance. Herein, an overview of recent advancements proposed instructive...
Abstract This review discusses the utilization of metal halide perovskite (MHP) materials in X‐ray direct imaging detectors for medical application. Compared to traditional semiconductors, MHP has multiple advantages including high linear attenuation coefficient, low exciton binding energy, long carrier diffusion length, and mobility. These ascendancies allow low‐dose high‐resolution imaging. Apartment from a historical overview develop‐X‐ray their performance indicators, this specifically...
Abstract Lead‐halide perovskites have received extensive attention in X‐ray imaging applications recently. However, their poor stability, lead toxicity, and strong light self‐absorption seriously limit the commercial development. Here, we report a vacancy‐ordered Cs 2 HfCl 6 double perovskite for scintillators applications. The microcrystals (MCs) are characterized by broadband blue emission with large Stokes shift. Joined experimental‐theoretical characterizations reveal highly localized...
Abstract The urgency for cost‐effective, high‐resolution, flexible X‐ray imaging detectors is generating great demand scintillators with low‐temperature processability, high scintillation yield, and negligible afterglow. materials are currently dominated by inorganic in the form of rigid films bulk crystals, which have inherent limitations including high‐temperature, complex synthesis, considerable challenges toward advanced nonplanar imaging. Here, high‐performance based on novel...
Narrow-band luminescence was observed from Ag–In–Ga–S alloyed nanocrystals were synthesized through a seed-mediated growth and cation exchange strategy, which originated the recombination of conduction band edge to silver vacancy states.
The perovskite solar cells (PSCs) have attracted world-wide attention in both academia and industry. With the deeper understanding of hybrid perovskites materials, decent photovoltaic efficiencies been witnessed corresponding devices. To date, substantial literatures published to review rapid progress this field, mainly focused on materials properties, design device configuration, investigation their operational principles. In context structure, electrode is one essential components that...
Photon upconversion emission in a series of Yb<sup>3+</sup>–Tb<sup>3+</sup> and Yb<sup>3+</sup>–Eu<sup>3+</sup> activated nanoparticles were investigated this study.