A5100604475- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Optical properties and cooling technologies in crystalline materials
- Chalcogenide Semiconductor Thin Films
- Conducting polymers and applications
- Solid-state spectroscopy and crystallography
- ZnO doping and properties
- Organic Electronics and Photovoltaics
- Copper-based nanomaterials and applications
- Organic and Molecular Conductors Research
- Boron and Carbon Nanomaterials Research
- Diamond and Carbon-based Materials Research
- Ga2O3 and related materials
- Advanced Nanomaterials in Catalysis
- Magnetic properties of thin films
- Dielectric properties of ceramics
- Gold and Silver Nanoparticles Synthesis and Applications
- Photonic Crystals and Applications
- Thin-Film Transistor Technologies
- TiO2 Photocatalysis and Solar Cells
- Multiferroics and related materials
Dalian University of Technology
2013-2025
Zhejiang University
2016-2024
Wenzhou University
2021-2024
State Key Laboratory of Silicon Materials
2016-2023
The Synergetic Innovation Center for Advanced Materials
2022
Nanjing University of Posts and Telecommunications
2021-2022
Donghua University
2022
Southwest Jiaotong University
2020
Hubei University
2007-2020
Nankai University
2018
Bulk crystal of tetragonal CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>with dimensions centimeters grown by a temperature-lowering method in HI solution is reported for the first time.
We report a facile solution-based approach to the in situ growth of perovskite films consisting monolayers CsPbBr3 nanoplates passivated by bulky phenylbutylammonium (PBA) cations, that is, two-dimensional layered PBA2(CsPbBr3)n-1PbBr4 perovskites. Optimizing film formation processes leads perovskites with controlled n values range 12-16. The emitters show quantum-confined band gap energies narrow distribution, suggesting thickness-controlled quantum-well (TCQW) structures. TCQW exhibit...
Solution-processed planar perovskite light-emitting diodes (LEDs) promise high-performance and cost-effective electroluminescent devices ideal for large-area display lighting applications. Exploiting emission layers with high ratios of horizontal transition dipole moments (TDMs) is expected to boost the photon outcoupling LEDs. However, LEDs based on anisotropic nanoemitters remain be inefficient (external quantum efficiency, EQE <5%) due difficulties simultaneously controlling orientations...
Metal halide perovskites exhibit remarkable properties for optoelectronic applications, yet their susceptibility to ion migration poses challenges device stability. Previous research has predominantly focused on the of ions. However, cations, which also a significant influence performance, is largely overlooked. In this Perspective, we review cations and impacts perovskite materials devices. Special attention shall be devoted recent insights into L-site organic in 2D/3D perovskites. We...
Abstract Although perovskite light-emitting diodes (PeLEDs) have recently experienced significant progress, there are only scattered reports of PeLEDs with both high efficiency and long operational stability, calling for additional strategies to address this challenge. Here, we develop perovskite-molecule composite thin films efficient stable PeLEDs. The consist in-situ formed high-quality nanocrystals embedded in the electron-transport molecular matrix, which controls nucleation process...
Inorganic–organic hybrid perovskites have drawn considerable attention in photovoltaics and light-emitting diodes (LEDs) due to their exceptional optoelectronic properties. Perovskite multiple quantum wells (MQWs), which employ large organic ammonium cations form layered structures, been developed for high-efficiency perovksite LEDs (PeLEDs). However, little is known about the impacts of on properties MQW films. In this work, we report phenylbutylammonium-cesium lead iodides, exhibit a...
Exploitation of next-generation blue light-emitting diodes (LEDs) is the foundation revolution in lighting and display devices. Development high-performance perovskite LEDs still challenging. Herein, 4-aminobenzenesulfonic acid (SA) introduced to passivate CsPbBr3 nanoplates (NPLs), reducing ionic migration via a more stable Pb2+-SO3-- formation, trap state density films shows 50% reduction. The inevitable Br- vacancy defects after multistep washing process can be suppressed by suitable MABr...
Growth of single crystal beta carbon nitride ( β ‐C 3 N 4 ) nanorods (see Figure) has been achieved for the first time through thermal annealing nanosized nitrides induced by high‐energy ball milling under a streaming flow NH . Most grow along [001] direction, and surfaces are defined (011) (010) specific crystallographic planes. A possible growth mechanism is discussed.
Abstract Solution‐processed, self‐organized multiple quantum well (MQW) perovskites possess good film coverage and high photoluminescence efficiency, which are promising for performance light‐emitting diodes (LEDs). However, due to the inclusion of insulating large organic cation as barrier layer, charge transport in MQW is not efficient 3D perovskites, limits improvement power conversion efficiency perovskite LEDs. Here, it demonstrated that by molecular engineering, conductivity can be...
Perovskite light-emitting diodes (PeLEDs) provide new opportunities for cost-effective and large-area electroluminescent devices. It is of interest to use ZnO-based electron-transport layers (ETLs), which demonstrate superior performance in other solution-processed LEDs, PeLEDs. However, the notorious deprotonation reaction between ZnO perovskite casts doubt on long-term stability PeLEDs with ETLs. This Perspective presents an overview chemical reactions that may occur at interfaces We...
α-CsPbI3 nanocrystals (NCs) with poor stability prevent their wide applications in optoelectronic fields. Ca2+ (1.00 Å) as a new B-site doping ion can successfully boost CsPbI3 NC performance both improved phase and properties. With Ca2+/Pb2+ ratio of 0.40%, photoluminescence (PL) could be greatly enhanced. Facilitated by increased tolerance factor, the cubic its solid film maintained after 58 days ambient condition or 4 h accelerated aging process at 120°C. The PL solution preserved to 83%...
All-solution-processed perovskite light-emitting diodes (LEDs) have the potential to be inexpensive and easily manufactured on a large scale without requiring vacuum thermal deposition of emissive charge transport layers. Zinc oxide (ZnO), which possesses superior optical electronic properties, is commonly used in all-solution-processed optoelectronic devices. However, polar solvent ZnO inks can corrode layer cause severe photoluminescence quenching. In this work, we report successful...
Visible-light induced trap filling in the ZnONP–AuNR composite layer for highly efficient third generation solar cells.
Distribution of the transition dipole moments (TDMs) light emitters can intrinsically affect out-coupling efficiency planar light-emitting diodes (LEDs). Lacking control TDM distribution has limited nanocrystal-based LEDs to 20%. Here, we present a method that deposits uniform nanocrystal films with unity in-plane distribution. Combining an inkjet printing technique and colloidal self-assembly, achieved direct in situ assembly CdSe/CdS nanoplatelets all orient "face-down" on various...
Generally, solvents used to synthesize perovskite NCs are toxic, which leads waste liquid pollution and environmental degradation. Herein, we developed a novel environmentally friendly polar solvent method CsPbBr3 nanocrystals (NCs). Over 65% photoluminescence quantum yield (PLQYs) for could be maintained over 45-850 h of storage time, maximum was 78% at 750 h. Such amazing stability in is dominated by ripening process, heals surface defects. Additionally, their solid films also exhibited...
Abstract Recently, the discovery of room temperature magnetoelectricity in organic charge transfer complexes has reignited interest multiferroic field. The solution processed, large-area and low cost semiconductor materials offer new possibilities for functional all devices. Here we report spin polarization excitons states composites by using extended Su-Schrieffer-Heeger model including Coulomb interaction spin-flip effect. With consideration polarization, suggest a possible mechanism...
Perovskite light-emitting diodes (PeLEDs) are attracting increasing attention owing to their impressive efficiencies and high luminance across the full visible light range. Further improvement of external quantum efficiency (EQE) planar PeLEDs is limited by out-coupling efficiency. Introducing perovskite emitters with directional emission in an effective way improve extraction. Here, we report that it possible achieve mixed-dimensional perovskites controlling orientation emissive center...