A5078810789- Perovskite Materials and Applications
- 2D Materials and Applications
- Quantum Dots Synthesis And Properties
- Conducting polymers and applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Combustion and Detonation Processes
- Fluid Dynamics and Heat Transfer
- Particle Dynamics in Fluid Flows
- Coal Properties and Utilization
- Chalcogenide Semiconductor Thin Films
- Strong Light-Matter Interactions
- Solid-state spectroscopy and crystallography
- Aerosol Filtration and Electrostatic Precipitation
- Granular flow and fluidized beds
- Image Enhancement Techniques
- Hydrocarbon exploration and reservoir analysis
- Advanced Photocatalysis Techniques
- Thermal Expansion and Ionic Conductivity
- solar cell performance optimization
- Organic Light-Emitting Diodes Research
- Random lasers and scattering media
- Water Quality Monitoring and Analysis
- Optical and Acousto-Optic Technologies
- Advanced Fiber Laser Technologies
Rice University
2020-2024
China University of Mining and Technology
2018-2024
Mongolian University of Science and Technology
2014
National University of Defense Technology
2013
China Shenhua Energy (China)
2001
We present a design strategy for fabricating ultrastable phase-pure films of formamidinium lead iodide (FAPbI 3 ) by lattice templating using specific two-dimensional (2D) perovskites with FA as the cage cation. When pure FAPbI precursor solution is brought in contact 2D perovskite, black phase forms preferentially at 100°C, much lower than standard annealing temperature 150°C. X-ray diffraction and optical spectroscopy suggest that resulting film compresses slightly to acquire (011)...
Abstract Excitons, bound electron–hole pairs, in two-dimensional hybrid organic inorganic perovskites (2D HOIPs) are capable of forming light-matter states known as exciton-polaritons (E–Ps) when the excitonic medium is confined an optical cavity. In case 2D HOIPs, they can self-hybridize into E–Ps at specific thicknesses HOIP crystals that form a resonant cavity with excitons. However, fundamental properties these self-hybridized including their role ultrafast energy and/or charge transfer...
Two-dimensional (2D) hybrid organic inorganic perovskite (HOIP) semiconductors have attracted widespread attention as a platform of next-generation optoelectronic devices benefiting from their naturally occurring and tunable multiple quantum-well-like (QW-like) structures, which enable wide range physical properties. Determining the intrinsic optical/electronic properties 2D HOIPs is extremely important for further utility in photonic devices. Here, we obtain optical dielectric functions,...
Interlayer excitons (IXs) in two-dimensional (2D) heterostructures provide an exciting avenue for exploring optoelectronic and valleytronic phenomena. Presently, research is limited to transition metal dichalcogenide (TMD) based 2D heterostructure samples, which require strict lattice (mis) match interlayer twist angle requirements. Here, we explore a system with experimental observation of spin-valley layer coupling realize helicity-resolved IXs, without the requirement specific geometric...
Light-matter coupling in excitonic materials has been the subject of intense investigation due to emergence new materials. Two-dimensional layered hybrid organic/inorganic perovskites (2D HOIPs) support strongly bound excitons at room-temperatures with some highest oscillator strengths and electric loss tangents among known Here, we report strong light-matter Ruddlesden-Popper phase 2D-HOIPs crystals without necessity an external cavity. We concurrent occurrence multiple-orders states via...
Colloidal perovskite quantum dots (PQDs) are an exciting platform for on-demand quantum, and classical optoelectronic photonic devices. However, their potential success is limited by the extreme sensitivity low stability arising from weak intrinsic lattice bond energy complex surface chemistry. Here we report a novel of buried (b-PQDs) in three-dimensional thin-film, fabricated using one-step, flash annealing, which overcomes related instabilities colloidal dots. The b-PQDs demonstrate...
We have fabricated a new type of seven-core photonic crystal fiber and demonstrated its all-fiber supercontinuum source pumped with ytterbium-doped master oscillator power amplifier. The generated covers the wavelength range from 720 nm to beyond 1700 nm, an output 42.3 W. It is first high-power SC based on fiber.
The layer edge states or low energy state (LES) in 2D hybrid organic–inorganic perovskites demonstrate a prolonged carrier lifetime for better performance of optoelectronic devices. However, the fundamental understanding LES is still inconclusive. Herein, photoluminescence (PL) study Ruddlesden–Popper presented with n = 2 and 3 from their cleaved cross sections that are more stable than natural edge. PL measurements clearly observe reversible, irreversible surface relaxations (case I case...
Two-dimensional (2D) hybrid organic–inorganic perovskites (HOIPs) are promising candidates for optoelectronic applications due to their efficient light emission properties and strong dielectric confinement effects. Raman spectroscopy is a versatile, non-contact, often non-destructive technique, widely used characterize crystalline materials. However, the weak phonon scattering, background, complex nature of signals from HOIPs present challenges in obtaining reliable signals. Furthermore,...
The 2D Ruddlesden–Popper (RP) perovskites Cs2PbI2Cl2 (Pb-based, n = 1) and Cs2SnI2Cl2 (Sn-based, stand out as unique rare instances of entirely inorganic constituents within the more expansive category organic/inorganic perovskites. These materials have recently garnered significant attention for their strong UV-light responsiveness, exceptional thermal stability, theoretically predicted ultrahigh carrier mobility. In this study, we synthesized Pb Sn-based 1 RP perovskite films covering...
In 1964, Keldysh laid the groundwork for strong-field physics in atomic, molecular, and solid-state systems by delineating a ubiquitous transition from multiphoton absorption to quantum electron tunneling under intense AC driving forces. While both processes semiconductors can generate carriers result photon emission through electron-hole recombination, low yields most materials have hindered direct observation of crossover. Leveraging large photoluminescence lead halide perovskites, we show...
Two-dimensional (2D) hybrid organic inorganic perovskite (HOIP) semiconductors have attracted widespread attention as a platform of next generation optoelectronic devices benefiting from their naturally occurring and tunable multiple quantum-well like (QW) structures, which enable wide range physical properties. Determining the intrinsic optical/electronic properties 2D HOIPs is extremely important for further utility in photonic optoelectronics devices. Here, we obtain optical dielectric...