A5100656773- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Chalcogenide Semiconductor Thin Films
- Semiconductor Quantum Structures and Devices
- Nanowire Synthesis and Applications
- Organic Electronics and Photovoltaics
- GaN-based semiconductor devices and materials
- Semiconductor Lasers and Optical Devices
- Advanced optical system design
- 2D Materials and Applications
- ZnO doping and properties
- Optical Coatings and Gratings
- Photonic and Optical Devices
- Nanocluster Synthesis and Applications
- Advanced Sensor and Energy Harvesting Materials
- Orbital Angular Momentum in Optics
- solar cell performance optimization
- Carbon and Quantum Dots Applications
- Advanced Condensed Matter Physics
- Graphene research and applications
- Dielectric materials and actuators
- Magnetic and transport properties of perovskites and related materials
- Gold and Silver Nanoparticles Synthesis and Applications
Shenzhen Technology University
2021-2025
Wuhan National Laboratory for Optoelectronics
2010-2024
Changzhou University
2021-2024
Liaoning University
2011-2024
Huazhong University of Science and Technology
2010-2024
Shaanxi Provincial Land Engineering Construction Group
2021-2024
Changsha University of Science and Technology
2022-2024
Air Force Engineering University
2024
Songshan Lake Materials Laboratory
2024
South China Normal University
2024
To improve the quality and durability of inorganic halide perovskite nanocrystals (NCs), ammonium lead oxide (PbO) were separately employed for synthesis NCs with a tunable ratio metal to halide. The halide-rich circumstance was therefore successfully set up found be beneficial obtaining good high photoluminescence quantum yields remarkable stability against purification compared those qualities previous regular methods fabricated light-emitting diode (LED) devices made in demonstrated...
Abstract Luminescent solar concentrator (LSC) incorporated with quantum dots (QDs) have been widely regarded as one of the most important development trends cost-effective energy. In this study, for first time we report a new QDs-LSC integrated heavy metal free CuInS 2 /ZnS core/shell QDs large Stokes shift and high optical efficiency. The as-prepared possess advantages photoluminescence yield 81% Stocks more than 150 nm. efficiency reaches 26.5%. Moreover, power conversion QDs-LSC-PV device...
The polarization property of CsPbX<sub>3</sub> perovskites have been observed and studied systematically in this paper.
Abstract As the concerns about using cadmium‐based quantum dots (QDs) in display are growing worldwide, InP QDs have drawn much attention dot light‐emitting diodes (QLEDs). However, pure blue based QLED has been rarely reported. In this work, first of all, InP/ZnS with emission wavelength 468 nm and yield 45% synthesized. Furthermore, zinc oleate S‐TOP used as precursors to epitaxially grow second ZnS shell. The residual stearate reacted form shell, which increased thickness stability QDs....
Printable perovskite quantum dot (QD) ink is very important for achieving high quality coffee ring-free fluorescent microarrays different kinds of emerging optoelectronic applications using inkjet printing.
A dithienobenzodithiophene‐based π‐conjugated polymer consisting of fluorinated benzotriazole and benzothiadiazole is successfully applied through anti‐solvent method to passivate the defects perovskite crystals. The interacts with under coordinated Pb 2+ ions in crystals form Pb‐F bond which effectively passivates defects. trap density reduced charge carrier transfer between film Spiro‐OMeTAD also improved after passivation polymer. As a result, power conversion efficiency (PCE) 18.03%...
Abstract All‐polymer solar cells (all‐PSCs) have promising potential for industrial production due to their superior stability. Recently, the widespread application of polymerized small molecule acceptor (PSMA) has led a surge in efficiency all‐PSCs. However, high efficiencies these devices generally rely on use highly volatile solvent, chloroform (CF). Furthermore, molecular weights PSMA are lower than polymer donors, yet crystallinity is weaker typical molecules, making most PSMA‐based...
Abstract Chiral‐induced spin selectivity (CISS) effect provides innovative approach to spintronics and quantum‐based devices for chiral materials. Different from the conventional ferromagnetic devices, application of CISS is potential operate under room temperature zero applied magnetic field. Low dimensional perovskites by introducing amines are beginning show significant injection, but research on still in its infancy, especially spin‐light emitting diode (spin‐LED) construction. Here,...
Low optical efficiency of light-emitting diode (LED) based headlamp is one the most important issues to obstruct applications LEDs in headlamp. An effective high-efficient LED freeform lens design method introduced this paper. A low-beam and a high-beam for are designed according method. Monte Carlo ray tracing simulation results demonstrate that with these two lenses can fully comply ECE regulation without any other or reflector. Moreover, efficiencies both more than 88% theory.
A high quantum yield, tunable band gap, and color purity of perovskite nanocrystals make this class materials attractive for electronic optoelectronic applications in devices including solar cells, photodetectors, light emitting diodes.
Abstract The energy band alignment in solar cell devices is critically important because it largely governs elementary photovoltaic processes, such as the generation, separation, transport, recombination and collection of charge carriers. Despite expenditure considerable effort, measurement depth profiles across multiple layers has been extremely challenging, especially for operando devices. Here we present direct visualization surface potential profile over cross-sections organic using...
Visible light communication (VLC) is an advanced and high-efficiency wireless technology. As one of the most important sources in VLC, conventional white emitting diode (WLED) based on Y3Al5O12:Ce3+ (YAG:Ce) phosphor limits system transmitting rate severely due to its narrow modulation bandwidth. Considering short fluorescent lifetime quantum dots (QDs), QD-LEDs with wide bandwidths were designed here improve VLC. CdSe/ZnS core/shell QDs related luminescent microspheres (LMS) implemented as...
Recently, lead sulfide (PbS) quantum dots (QDs) have demonstrated great potential in becoming one of the most promising next-generation photoelectrical materials for photodetectors. PbS QDs provide fascinating properties including size-controllable spectral sensitivity, a wide and tunable absorption range, cost-efficient solution processability, flexible substrate compatibility. One key problems that limit performance QDs-based photodetectors is inefficient carrier transfer. Long ligands...
Abstract Recently, metal halide perovskite light‐emitting diodes (Pero‐LEDs) have achieved significant improvement in device performance, especially for external quantum efficiency (EQE). And EQE is mostly determined by internal of the emitting material, charge injection balancing factor (η c ), and light extraction (LEE) device. Herein, an ultrathin poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (UT‐PEDOT:PSS) hole transporter layer prepared a water stripping method, UT‐PEDOT:PSS...
Abstract Enhanced hole injection is essential to achieve high performance in perovskite light-emitting diodes (LEDs). Here, a strategy introduced enhance by an electric dipole layer. Hopping theory demonstrates dipoles between layer and transport can significantly. MoO 3 then chosen as the PEDOT:PSS (hole layer) PVK generate due its deep conduction band level. Theoretical results demonstrate that strong fields are produced for efficient injection, recombination rate substantially increased....
center461554Crystal orientation manipulation improves the device performance of all-inorganic perovskite light-emitting diodes.
Analyzing and optimizing carrier behaviors are essential to achieve high electroluminescence performance in perovskite light-emitting diodes (PeLEDs). In this work, a capacitance–voltage (C–V) model for PeLEDs is established describe behaviors. Four distinct regions typical C–V model, including neutrality region, barrier diffusion recombination were analyzed. Importantly, the implemented guide (EL) improvement PeLEDs. By studying measured characteristics of PeLED, issues hole injection...
Abstract The development of in situ growth methods for the fabrication high‐quality perovskite single‐crystal thin films (SCTFs) directly on hole‐transport layers (HTLs) to boost performance optoelectronic devices is critically important. However, large‐area SCTFs with thickness still remains a significant challenge due elusive mechanism this process. In work, influence three key factors large‐size MAPbBr 3 HTLs investigated. An optimal “sweet spot” determined: low interface energy between...
Applications involving image sensors, computer vision, and optical communications all require adjustable spectral narrowband photodetectors. In recent years, because of their excellent optoelectronic characteristics, metal halide perovskites have drawn a great deal interest. Bearing these properties, photodetectors using as either active or other functional layers demonstrated performance, covering both wide tunable range. this review, latest advancements in perovskite are outlined, focusing...
Materials with circularly polarized luminescence (CPL) activity are promising in many chiroptoelectronics fields, such as for biological probes, asymmetric photosynthesis, information storage, spintronic devices, and so on. Promoting the value of dissymmetry factor (glum) CPL-active materials based on chiral perovskite draws increasing attention since a higher glum indicates better CPL. In this work, we find that, after being treated facile solvent modulation strategy, chirality 2D films has...
Developing in situ-grown perovskite single-crystal thin films (PeSCTFs) on transport layers is essential to achieve high-performance optoelectronic devices. However, it remains a challenge grow PeSCTFs situ with high area-to-thickness ratio and low trap density. Here, we propose new strategy of gradient heating nucleation room-temperature growth. Gradient helps overcome the energy barrier reduce number crystal nuclei, growth rate aims at an orderly deposition diffusion atoms for quality....
We demonstrate a freeform lens to enhance the angular color uniformity (ACU) of white light-emitting diodes (LEDs) whose phosphor layers were coated by freely dispersed coating processes. Monte Carlo ray tracing simulation results indicated that ACU modified LED integrated with significantly increased from 0.334 0.957, compared traditional LED. Enhancement reached as high 186.5%. Moreover, was not only at level, but also stable when shape layer changed. The provided an effective way achieve...