A5100651330- Perovskite Materials and Applications
- 2D Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Strong Light-Matter Interactions
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Nanowire Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- MXene and MAX Phase Materials
- Optical properties and cooling technologies in crystalline materials
- Thermal Radiation and Cooling Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Advanced Fiber Laser Technologies
- Graphene research and applications
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Electric Motor Design and Analysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Metal-Organic Frameworks: Synthesis and Applications
- Magnetic Bearings and Levitation Dynamics
National Center for Nanoscience and Technology
2016-2025
University of Chinese Academy of Sciences
2010-2025
Center for NanoScience
2018-2025
Shandong Jianzhu University
2024
Harbin Institute of Technology
2010-2023
Chinese Academy of Sciences
2009-2023
Ministry of Industry and Information Technology
2023
Dalian National Laboratory for Clean Energy
2022
Northeastern University
2022
Fiberhome Technology Group (China)
2022
Near-infrared (NIR) solid-state micro/nanolasers are important building blocks for true integration of optoelectronic circuitry. Although significant progress has been made in III-V nanowire lasers with achieving NIR lasing at room temperature, challenges remain including low quantum efficiencies and high Auger losses. Importantly, the obstacles toward integrating one-dimensional nanowires on planar ubiquitous Si platform need to be effectively tackled. Here we demonstrate a new family...
Semiconductor micro/nano‐cavities with high quality factor (Q) and small modal volume provide critical platforms for exploring strong light‐matter interactions quantum optics, enabling further development of coherent photonic devices. Constrained by exciton binding energy thermal fluctuation, only a handful wide‐band semiconductors such as ZnO GaN have stable excitons at room temperature. Metal halide perovskite cubic lattice well‐controlled may solutions. In this work, high‐quality...
Highly crystalline organic–inorganic lead halide perovskite nanoplatelets are grown on muscovite mica utilizing van der Waals epitaxial growth followed by thermally intercalating methyl ammonium halides. The resulting CH3NH3PbI3 platelets show excellent optical properties with an electron diffusion length of more than 200 nm, which is approximately two times higher that the solution-processed film, suggesting considerable promise in photovoltaics and optoelectronics.
Lead halide perovskites have recently become a rapidly growing research field due to their great potential in next‐generation solar cells and photonic sources. As direct bandgap semiconductor, are also promising candidates for low‐threshold multicolor lasing devices high optical gain, ease of engineering, large absorption coefficient, low defect state density. In particular, reduced‐dimensional perovskite structures including nanoplatelets, nanowires, quantum dots, crucial the development...
A cocrystal strategy with a simple preparation process is developed to prepare novel materials for near-infrared photothermal (PT) conversion and imaging. DBTTF TCNB are selected as electron donor (D) acceptor (A) self-assemble into new cocrystals through non-covalent interactions. The strong D-A interaction leads narrow band gap NIR absorption that both the ground state lowest-lying excited charge transfer states. Under laser illumination, temperature of sharply increases in short time high...
Nonlinear 2D layered crystals provide ideal platforms for applications and fundamental studies in ultrathin nonlinear optical (NLO) devices. However, the NLO frequency conversion efficiency constrained by lattice symmetry is still limited layer numbers of crystals. In this work, 3R MoS 2 with broken inversion structure are grown proved to be excellent from monolayer (0.65 nm) toward bulk‐like (300 dimension. Thickness wavelength‐dependent second harmonic generation spectra offer selection...
Abstract Further minimizing the defect state density in semiconducting absorber is vital to boost power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy control precursor chemistry for defects reduction family iodine based perovskite. Here alkaline environment solution carefully investigated as an effective parameter suppress incident and affects crystallization kinetics during film fabrication, via rationale adjustment alkalinity...
The family of solution-processed tin-based perovskites is demonstrated as a new and superior near-infrared gain medium. Due to the large electron-hole bimolecular recombination associated with tin reduced trap density SnF2 treatment, these lead-free "green" yield stable coherent light emission extending ≈1 μm at strikingly low thresholds.
Highly efficient ternary non-fullerene PSCs were fabricated employing PBDB-T as the donor and mixed ITCPTC:IDT6CN-M acceptors.
Abstract Two-dimensional metallic transition metal dichalcogenides are emerging as prototypes for uncovering fundamental physical phenomena, such superconductivity and charge-density waves, well engineering-related applications. However, the batch production of envisioned remains challenging, which has hindered aforementioned explorations. Herein, we fabricate thickness-tunable tantalum disulfide flakes centimetre-sized ultrathin films on an electrode material gold foil via a facile chemical...
Abstract Nonfullerene polymer solar cells (PSCs) are fabricated by using one wide bandgap donor PBDB‐T and ultranarrow acceptor IEICO‐4F as the active layers. One medium PTB7‐Th is selected third component due to similar highest occupied molecular orbital level compared that of their complementary absorption spectra. The champion power conversion efficiency (PCE) PSCs increased from 10.25% 11.62% via incorporating 20 wt% in donors, with enhanced short‐circuit current ( J SC ) 24.14 mA cm −2...
A new approach for the synthesis of infinite Ti–O rod-based MOFs with superior photocatalytic H<sub>2</sub> evolution performances was developed.
Atomically thin and sharp van der Waals heterojunction can be created by vertically stacking p-type monolayer tungsten diselenide (WSe2) onto n-type molybdenum disulfide (MoS2). Theory predicts that stacked MoS2 WSe2 forms type II p–n junction, creating a built-in electric field across the interface which facilitates electron–hole separation transfer. Gaining insights into dynamics of charge transfer heterostructure is central to understanding light-photocurrent conversion at these ultrathin...
Engineering interfacial photo-induced charge transfer for highly synergistic photocatalysis is successfully realized based on nanobamboo array architecture. Programmable assemblies of various components and heterogeneous interfaces, and, in turn, engineering the energy band structure along transport pathways, play a critical role generating excellent effects multiple promoting photocatalytic efficiency.
Metallic bowtie nanoarchitectures can produce dramatic electric field enhancement, which is advantageous in single-molecule analysis and optical information processing. Plasmonic nanostructures were successfully constructed using a DNA origami-based bottom-up assembly strategy, enables precise control over the geometrical configuration of with an approximate 5 nm gap. A single Raman probe was accurately positioned at gap bowtie. Single-molecule surface-enhanced scattering (SM-SERS)...
Abstract Efficient ternary polymer solar cells (PSCs) are prepared with poly‐[4,8‐bis(5‐(2‐ethylhexyl)thiophen‐2‐yl)benzo[1,2‐ b :4,5‐ b′ ] dithiophene‐ co ‐3fluorothieno[3,4‐ ]thiophene‐2‐carboxylate] (PTB7‐Th):CO i 8DFIC as host system and medium bandgap material BDTThIT‐4F the third component. The power conversion efficiency of PSCs can be increased from 11.47% to 13.08% by incorporating 20 wt% in acceptors, along simultaneously improved three key photovoltaic parameters. absorption edge...
Lead halide perovskites have emerged as excellent optical gain materials for solution-processable and flexible lasers. Recently, continuous-wave (CW) optically driven lasing was established in perovskite crystals; however, the mechanism of low-threshold operation is still disputed. In this study, CW-pumped from one-dimensional CsPbBr3 nanoribbons (NBs) with a threshold ∼130 W cm-2 demonstrated, which can be ascribed to large refractive index induced by exciton-polariton (EP) effect....
All-inorganic perovskite micro/nanowire materials hold great promises as nanoscale coherent light source due to their superior optical and electronic properties. The coupling strength between exciton photon in this system is important for application, however, rarely studied. In work, we demonstrated the strong of exciton-photon polariton lasing high quality CsPbBr3 micro/nanowires synthesized by a CVD method. By exploring spatial resolved PL spectra cavity, observed mode volume dependent...
2D Ruddlesden-Popper perovskites (RPPs) have aroused growing attention in light harvesting and emission applications owing to their high environmental stability. Recently, coherent of RPPs was reported, however mostly from inhomologous thin films that involve cascade intercompositional energy transfer. Lasing fundamental understanding intrinsic laser dynamics homologous free transfer is still inadequate. Herein, the lasing loss mechanisms (BA)2 (MA)n-1 Pbn I3n+1 RPP flakes mechanically...
Tin diselenide (SnSe2 ) nanosheets as novel 2D layered materials have excellent optical properties with many promising application prospects, such photoelectric detectors, nonlinear optics, infrared devices, and ultrafast photonics. Among them, photonics has attracted much attention due to its enormous advantages; for instance, extremely fast pulse, strong peak power, narrow bandwidth. In this work, SnSe2 are fabricated by using solvothermal treatment, the characteristics of systemically...