A5100735026- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Chalcogenide Semiconductor Thin Films
- Advanced Photocatalysis Techniques
- 2D Materials and Applications
- Semiconductor Quantum Structures and Devices
- Organic Electronics and Photovoltaics
- Optical Systems and Laser Technology
- GaN-based semiconductor devices and materials
- Solid-state spectroscopy and crystallography
- Copper-based nanomaterials and applications
- Optical properties and cooling technologies in crystalline materials
- Catalytic Processes in Materials Science
- Service-Oriented Architecture and Web Services
- Advanced Computational Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Graphene research and applications
- Nanocluster Synthesis and Applications
- Carbon and Quantum Dots Applications
- Ga2O3 and related materials
- CO2 Reduction Techniques and Catalysts
- Geology and Paleoclimatology Research
- Luminescence and Fluorescent Materials
- Electric and Hybrid Vehicle Technologies
- Organic Light-Emitting Diodes Research
Collaborative Innovation Center of Advanced Microstructures
2016-2025
Nanjing University
2016-2025
Nanjing Drum Tower Hospital
2025
Jiangsu University of Science and Technology
2019-2024
Ministry of Natural Resources
2024
University of Science and Technology Beijing
2022-2024
National Center of Ocean Standards and Metrology
2005-2024
China Academy of Space Technology
2018-2024
Zhejiang Academy of Social Sciences
2023
National Laboratory of Solid State Microstructures
2015-2022
A white light-emitting diode (0.33, 0.33) is fabricated using perovskite quantum dot/silica composites. It shown to have greatly improved stability. As a service our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support issues arising from (other than missing files) should addressed Please note: The publisher responsible content...
Abstract A novel, in situ simultaneous reduction‐hydrolysis technique (SRH) is developed for fabrication of TiO 2 ‐‐graphene hybrid nanosheets a binary ethylenediamine (En)/H O solvent. The SRH based on the mechanism reduction graphene oxide (GO) into by En and formation nanoparticles through hydrolysis titanium (IV) (ammonium lactato) dihydroxybis, subsequently loading onto chemical bonds (Ti–O–C bond) to form 2D sandwich‐like nanostructure. dispersion hinders collapse restacking exfoliated...
Abstract Semiconductor mixed-halide perovskites featured with a tunable energy bandgap are ideal candidates for light absorbers in tandem solar cells as well fluorescent materials light-emitting diodes and nanoscale lasers. These device advancements currently hindered by the light-induced phase segregation effect, whereby ion migration would yield smaller-bandgap domains red-shifted photoluminescence. Here we show that upon laser excitation all-inorganic nanocrystals unexpectedly exhibit...
The power conversion efficiency of photovoltaic devices based on semiconductor perovskites has reached ~20% after just several years research efforts. With concomitant discoveries other promising applications in lasers, light-emitting diodes and photodetectors, it is natural to anticipate what further excitements these exotic could bring about. Here we report the observation single photon emission from CsPbBr3 perovskite nanocrystals (NCs) synthesized a facile colloidal approach. Compared...
Bulk-heterojunction organic photovoltaic devices with nonfullerene acceptors (NFAs) exhibit efficient hole transfer small interfacial energy offset, which results in power conversion efficiencies above 17% single junction using the high-performance NFA of Y6. However, underlying mechanism responsible for channel polymer/Y6 blends remains poorly understood. Herein, we report that photocharge generation is mediated by an intra-moiety excited state a blend donor polymer PM6 and Y6 broadband...
An unprecedented, crystal facet-based CeO2 homojunction consisting of hexahedron prism-anchored octahedron with exposed prism surface {100} facets and {111} was fabricated through solution-based crystallographic-oriented epitaxial growth. The photocatalysis experiment reveals that growth the arm on allows to activate inert for an increase in phototocatalytic reduction CO2 into methane. pronounced photocatalytic performance is attributed a synergistic effect following three factors: (1) band...
One of the basic assumptions in organic field-effect transistors, most fundamental device unit electronics, is that charge transport occurs two dimensionally first few molecular layers near dielectric interface. Although mobility bulk semiconductors has increased dramatically, direct probing intrinsic two-dimensional limit not been possible due to excessive disorders and traps ultrathin thin films. Here, highly ordered single-crystalline mono- tetralayer pentacene crystals are realized by...
Elegant Z-scheme WO3/Au/In2S3 nanowire arrays were precisely constructed through a facile step-by-step route. Surface potential change on pristine or In2S3–Au coated WO3 single under dark and illumination detected Kelvin probe force microscopy (KPFM) technique indicates that the vectorial holes transfer of In2S3 → Au should occur upon excitation both In2S3. In such charge processes, embedded nanoparticles in heterojunction systems act as mediator for electrons conduction band valence The...
Abstract Artificial photosynthesis, light-driving CO 2 conversion into hydrocarbon fuels, is a promising strategy to synchronously overcome global warming and energy-supply issues. The quaternary AgInP S 6 atomic layer with the thickness of ~ 0.70 nm were successfully synthesized through facile ultrasonic exfoliation corresponding bulk crystal. sulfur defect engineering on this H O etching treatment can excitingly change photoreduction reaction pathway steer dominant generation ethene...
Abstract Due to the complex core–shell structure and variety of surface functional groups, photoluminescence (PL) mechanism carbon dots (CDs) remain unclear. o-Phenylenediamine (oPD), as one most common precursors for preparing red emissive CDs, has been extensively studied. Interestingly, emission CDs based on oPD have similar PL characteristics. Herein, we prepared six different oPD-based found that they had almost same absorption spectra after purification. Structural spectral...
The ZnIn2S4/BiVO4 heterostructures were elegantly designed through assembling ZnIn2S4 nanosheets onto the surface of BiVO4 decahedrons. This composite photocatalyst exhibits efficient photocatalytic conversion CO2 into CO with a detectable amount CH4 in presence water vapor. An electron spin-resonance spectroscopy (ESR) technique and density function theory (DFT) calculation affirm direct Z-scheme structure ZnIn2S4/BiVO4. larger photovoltage (SPV) change longer liquid photoluminescence (PL)...
We have performed the first single-particle spectroscopic measurements on individual graphene quantum dots (GQDs) and revealed several intriguing fluorescent phenomena that are otherwise hidden in optical studies of ensemble GQDs. First, despite noticeable differences size number layers from particle to particle, all GQDs studied possess almost same spectral lineshapes peak positions. Second, with more normally brighter emitters but associated shorter lifetimes. Third, spectrum was...
Here we show that, in single perovskite CsPbI_{3} nanocrystals synthesized from a colloidal approach, bright-exciton fine-structure splitting as large hundreds of μeV can be resolved with two orthogonally and linearly polarized photoluminescence peaks. This doublet could switch to peak when nanocrystal is photocharged eliminate the electron-hole exchange interaction. The above findings have prepared an efficient platform suitable for probing exciton spin dynamics semiconductor nanostructures...
An all-solid-state Z-scheme system array consisting of Fe<sub>2</sub>V<sub>4</sub>O<sub>13</sub>/RGO/CdS was rationally designed for visible light-driving photocatalytic CO<sub>2</sub> reduction into CH<sub>4</sub>.
Two-dimensional MoS2 nanosheets were in situ grown on TiO2 to form two-dimensional (2D) hybrid nanojunctions, with which compactly contact increase the interfacial area. was identified as a promising cost-effective substitute for noble metal cocatalysts such Pt, Au, and Ag, shows superior activity selectivity reducing CO2 CH3OH aqueous solution these under UV-vis light irradiation. The photo-luminescence (PL) spectra transient time-resolved PL decay measurements reveal that fast electron...
Hybrid metal/semiconductor nano-heterostructures with strong exciton-plasmon coupling have been proposed for applications in hot carrier optoelectronic devices. However, the performance of devices based on this concept has limited by poor efficiency plasmon-hot electron conversion at interface. Here, we report that interfacial excitation transfer can be substantially improved hybrid metal semiconductor consisting perovskite semiconductors. In Ag-CsPbBr3 nanocrystals, both plasmon-induced and...
We report that a photocatalyst made of amorphous cobalt phosphide (CoP<sub>x</sub>) integrated with CdS NRs for H<sub>2</sub> production under visible light. The CoP<sub>x</sub>/CdS gave an apparent quantum yield at ∼35% (<italic>λ</italic> = 450 nm).
Highly fluorescent InP/ZnS small-core/thick-shell quantum dots were synthesized for constructing heavy-metal-free blue dot-light-emitting diodes.
Abstract To explore new constituents in two‐dimensional (2D) materials and to combine their best van der Waals heterostructures is great demand as being a unique platform discover physical phenomena design novel functionalities interface‐based devices. Herein, PbI 2 crystals thin few layers are synthesized, particularly through facile low‐temperature solution approach with of large size, regular shape, different thicknesses, high yields. As prototypical demonstration band engineering ‐based...
In organic photovoltaic (OPV) blends, photogenerated excitons dissociate into charge-separated electrons and holes at donor/acceptor interfaces. The bimolecular recombination of spin-uncorrelated may cause nonradiative loss by forming the low-lying triplet excited states (T1) via intermediate charge-transfer states. Here, we show that such a spin-related channel can be suppressed in OPV blends with fluorinated nonfullerene acceptors (NFAs). By combining ultrafast optical spectroscopy...
Perovskite semiconductor nanocrystals with different compositions have shown promise for applications in light-emitting devices. Dark excitonic states may suppress light emission from such by providing an additional nonradiative recombination channel. Here, we study the composition dependence of dark exciton dynamics lead halides time-resolved photoluminescence spectroscopy at cryogenic temperatures. The presence a spin-related state is revealed magneto-optical spectroscopy. energy splitting...
A direct all-solid-state Z-scheme heterojunction photocatalyst of a g-C3N4-coated tree-like α-Fe2O3 was rationally constructed toward CO2 conversion. The so-called artificial tree shows excellent performance and stability for CO production (17.8 μmol g–1 h–1), almost 3 times that pristine g-C3N4. Density functional theory computations explain the intrinsic cause formation structure. enhanced photocatalytic can be attributed to synergistic effect following factors: (1) combination with g-C3N4...
Abstract The pure blue light‐emitting diodes (LEDs) play a key role in the application of solid display and illumination. Most LEDs reported so far, are based on semiconductor quantum dots metal complex, involving heavy elements. Here, fabrication O, N co‐doped carbon (CDs) by hydrothermal method from perylene‐3,4,9,10‐tetracarboxylic dianhydride 2,3‐diaminophenazine is shown. These CDs show strong photoluminescence (PL) emission peaked at 447 nm (in ethanol) with absolute PL yields 88.9%....