A5011518548- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Advanced Surface Polishing Techniques
- 2D Materials and Applications
- Antenna Design and Analysis
- Electronic and Structural Properties of Oxides
- Metamaterials and Metasurfaces Applications
- Semiconductor materials and interfaces
- RFID technology advancements
- Strong Light-Matter Interactions
- CCD and CMOS Imaging Sensors
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- Nanowire Synthesis and Applications
- Hydrogen Storage and Materials
- Magnetic and transport properties of perovskites and related materials
- Advanced Semiconductor Detectors and Materials
- Infrared Target Detection Methodologies
- Spectroscopy and Laser Applications
- Advancements in Battery Materials
- Graphene research and applications
- Advanced Antenna and Metasurface Technologies
Chinese Academy of Sciences
2011-2024
Hefei Institutes of Physical Science
2018-2024
Czech Academy of Sciences, Institute of Plasma Physics
2024
Institute of Plasma Physics
2024
Shanghai Institute of Optics and Fine Mechanics
2020-2023
High Magnetic Field Laboratory
2018-2023
University of Toronto
2020-2022
Shanghai University
2022
Ningbo University
2020-2021
University of Chinese Academy of Sciences
2020-2021
Abstract The all‐inorganic nature of CsPbI 3 perovskites allows to enhance stability in perovskite devices. Research efforts have led improved the black phase films; however, these strategies—including strain and doping—are based on organic‐ligand‐capped perovskites, which prevent from forming close‐packed quantum dot (QD) solids necessary achieve high charge thermal transport. We developed an inorganic ligand exchange that leads QD films with superior increased atomic‐ligand‐exchanged...
Blue-emitting perovskites can be easily attained by precisely tuning the halide ratio of mixed (Br/Cl) (MHPs). However, adjustable hinders passivation Cl vacancies, main source trap states leading to inferior performance blue MHP light-emitting diodes (LEDs). Here, we report a strategy for passivating vacancies in quantum dots (QDs) using nonpolar solvent-soluble organic pseudohalide [n-dodecylammonium thiocyanate (DAT)], enabling LEDs with greatly enhanced efficiency. Density functional...
It remains a central challenge to the information display community develop red light-emitting diodes (LEDs) that meet demanding color coordinate requirements for wide gamut displays. Here, we report high-efficiency, lead-free (PEA)2SnI4 perovskite LEDs (PeLEDs) with coordinates (0.708, 0.292) fulfill Rec. 2100 specification emitters. Using valeric acid (VA)-which show be strongly coordinated Sn2+-we slow crystallization rate of perovskite, improving film morphology. The incorporation VA...
Abstract Metal halide perovskites have emerged as promising candidates for solution-processed blue light-emitting diodes (LEDs). However, phase segregation – and the resultant spectral shift at LED operating voltages hinders their application. Here we report true-blue LEDs employing quasi-two-dimensional cesium lead bromide with a narrow size distribution of quantum wells, achieved through incorporation chelating additive. Ultrafast transient absorption spectroscopy measurements reveal that...
Metal halide perovskites show promise for light-emitting diodes (LEDs) owing to their facile manufacture and excellent optoelectronic performance, including high color purity spectral stability, especially in the green region. However, blue perovskite LEDs, emission spectrum line width is broadened over 25 nm by coexistence of multiple reduced-dimensional domains, stability poor, with an undesirable shift (over 7 nm) toward longer wavelengths under operating conditions, degradation that...
Abstract Perovskites—compounds with the CaTiO 3 -type crystal structure—show outstanding performance in photovoltaics and multiparameter optical emitters due to their large oscillator strength, strong solar absorption, excellent charge-transport properties. However, ability realize control many-body quantum states perovskites, which would extend application from classical optoelectronic materials ultrafast operation, remains an open research topic. Here, we generate a cooperative state of...
Modulating terahertz (THz) waves actively and smartly through an external field is highly desired in the development of THz spectroscopic devices. Here, we demonstrate active smart electro-optic modulator based on a strongly correlated electron oxide vanadium dioxide (VO
The demand for terahertz (THz) communication and detection fuels continuous research high performance of THz absorption materials. In addition to varying the materials their structure passively, an alternative approach is modulate a wave actively by tuning external stimulus. Correlated oxides are ideal this because effects small control parameter can be amplified inner electronic correlations. Here, utilizing unpatterned strongly correlated electron oxide VO2 thin film, photoinduced...
Abstract Metal halide perovskites have emerged as promising candidates for solution‐processed laser gain materials, with impressive performance in the green and red spectral regions. Despite exciting progress, deep‐blue—an important wavelength applications—remains underexplored; indeed, cavity integration single‐mode lasing from large‐bandgap yet to be achieved. Here, a vapor‐assisted chlorination strategy that enables synthesis of low‐dimensional CsPbCl 3 thin films exhibiting deep‐blue...
Abstract Perovskite quantum dots (QDs) are of interest for solution‐processed lasers; however, their short Auger lifetime has limited lasing operation principally to the femtosecond temporal regime photoexcitation levels achieve optical gain threshold up two orders magnitude higher in nanosecond than femtosecond. Here authors report QD superlattices which medium facilitates excitonic delocalization decrease recombination and macroscopic dimensions structures provide feedback required lasing....
In this paper, a broadband reflective multi-polarization converter based on single-layer double-L-shaped metasurface is proposed. The proposed can effectively convert linear-polarized (TE/TM) incident wave into the reflected with three different polarizations within frequency bands of 5.5–22.75 GHz. Based electric and magnetic resonant features structure, linearly polarized waves cross-polarized at bands. Furthermore, be converted left/right handed circular-polarized (LHCP RHCP) other four...
We obtained broad-band CQD single-mode lasers across the entire visible region through combining CQDs with a microcavity.
Abstract Cavity‐enhanced superfluorescence is an ultrafast and intense lasing produced by strong interaction between optical cavity. However, due to the quite difficulty of particle cooperative emission in solid‐state systems, low coupling efficiency cavity, research on properties cavity‐enhanced thus far its infancy. Fortunately, perovskites being made into quantum dot superlattice microcavity excellent candidate as such light source. This work reveals time‐dependent redshift process under...
2D polyradical nanosheets were prepared using interfacial polymerization and exhibited obvious antiferromagnetic behavior.
Single Ni/Co anchored C<sub>9</sub>N<sub>4</sub> sheet works as an efficient catalyst for CO oxidation.
Abstract Birefringence, which modulates the polarization of electromagnetic wave, has been commercially developed and widely used in modern photonics. Fostered by high‐frequency signal processing communications, feasible birefringence technologies operating gigahertz (GHz) range are highly desired. Here, a coherent phonon‐induced GHz optical its manipulation SrTiO 3 (STO) crystals demonsrated. With ultrafast laser pumping, acoustic phonons with low damping created transducer/STO structures....
The collective response of macroscopic quantum states under perturbation is widely used to study correlations and cooperative properties, such as defect-induced vortices in Bose–Einstein condensates the non-destructive scattering impurities superfluids. Superfluorescence (SF), a effect rooted dipole–dipole cooperation through virtual photon exchange, leads dipole moment (MDM) high-density ensembles. However, MDM SF systems remains unknown. Echo-like behavior observed exciton ensemble...
The exploration of efficient and cost-effective cathodes for flexible hybrid supercapacitors (HSCs) microbial fuel cells (MFCs) is highly desirable but challenging.
By utilizing time-resolved magneto-optical Kerr effect technique, we investigated both demagnetization and remagnetization processes of a typical two-dimensional (2D) van der Waals (vdW) ferromagnetic (FM) semiconductor Cr2Ge2Te6 (CGT) two comparative Te-based crystals, i.e. three-dimensional (3D) FM metal Cr3Te4 (CT) 2D vdW Fe3GeTe2 (FGT). Different from 3D CT showing one-step laser-induced demagnetization, two-steps behavior is dominated in FGT CGT, which indicates that the magnets have...
Texturization of mono-crystalline by chemical anisotropic etching is one the most important technologies for modern silicon photovoltaic. IPA usually added to alkaline etchants improve uniformity random pyramid texture due remove hydrogen bubbles sticking on wafer improving wettability surface. In this investigation, we carried out a systematic study influence concentrations textured The experiments were performed (100) in mixture 20 vol. % commercial TMAH solutions (10 wt.%) and (rang from...