A5084265432- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Luminescence Properties of Advanced Materials
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Chalcogenide Semiconductor Thin Films
- Ga2O3 and related materials
- Solid-state spectroscopy and crystallography
- Luminescence and Fluorescent Materials
- GaN-based semiconductor devices and materials
- Nanocluster Synthesis and Applications
- Optical properties and cooling technologies in crystalline materials
- Analytical Chemistry and Sensors
- Polymer Surface Interaction Studies
- Antimicrobial agents and applications
- Glass properties and applications
- Advanced Photocatalysis Techniques
- Hydrology and Watershed Management Studies
- Urban Heat Island Mitigation
- Transition Metal Oxide Nanomaterials
- Inorganic Chemistry and Materials
- Conducting polymers and applications
- Advanced Chemical Sensor Technologies
- Marine Biology and Environmental Chemistry
Zhengzhou University
2018-2025
Xiamen University of Technology
2025
Shaanxi Normal University
2021-2024
Imperial College London
2024
Guilin University of Electronic Technology
2023-2024
University of Science and Technology of China
2023
Chinese Academy of Sciences
2011-2023
Shanghai University
2022-2023
Chang'an University
2023
China University of Mining and Technology
2023
Currently, the blue perovskite light-emitting diodes (PeLEDs) suffer from a compromise in lead toxicity and poor operation stability, most previous studies have struggled to meet crucial NTSC standard. In this study, electrically driven deep-blue LEDs (∼445 nm) based on zero-dimensional (0D) Cs3Cu2I5 nanocrystals (NCs) were demonstrated with color coordinates of (0.16, 0.07) high external quantum efficiency ∼1.12%, comparable best-performing lead-halide perovskites. Encouraged by remarkable...
Abstract White light‐emitting diodes (WLEDs) are promising next‐generation solid‐state light sources. However, the commercialization route for WLED production suffers from challenges in terms of insufficient color‐rendering index (CRI), color instability, and incorporation rare‐earth elements. Herein, a new two‐component strategy is developed by assembling two broadband emissive materials with self‐trapped excitons (STEs) high CRI stable WLEDs. The addresses effectively challenging issues...
Great successes have been achieved in developing perovskite light-emitting devices (LEDs) with blue, green, red, and near-infrared emissions. However, as key optoelectronic devices, yellow-colored LEDs remain challenging, mainly due to the inevitable halide separation mixed perovskites under high bias, causing undesired color change of devices. In addition this color-missing problem, intrinsic toxicity poor stability conventional lead-halide also restrict their practical applications. We...
Recently, substantial progress has been made in perovskite-based light-emitting devices (LEDs) with near-infrared, red, green, and blue emissions. However, short-wavelength perovskite LEDs targeted at violet emission remain a great challenge. Moreover, the majority of previously reported were focused on conventional lead halide perovskites. In this study, for first time, electrically driven (408 nm) from lead-free Cs3Sb2Br9 quantum dots (QDs) was demonstrated room temperature, shortest...
We demonstrated a stable and spectrum-selective self-powered UV photodetector based on lead-free Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> films with excellent photodetection performance.
Flexible scintillator screens with environmental stability, high sensitivity, and low cost have emerged as candidates for X-ray imaging applications. Here, a large-scale cost-efficient solution synthesis of the vacancy-ordered double perovskite Cs2 ZrCl6 , which is characterized by thermal activation delayed fluorescence (TADF) dominated triplet emission under irradiation, demonstrated. The large Stokes shift efficient luminescence collection TADF effectively ensure light outcoupling...
CsPbBr<sub>3</sub> QDs/silica composites with substantially improved stability were applied as the color-converting layer for high-performance white LED fabrication.
High-performance and air-stable perovskite photodetectors were fabricated using lead-free double Cs<sub>2</sub>AgBiBr<sub>6</sub> thin films as light absorbers.
In this work, an effective strategy through doping of univalent Na+ ions, which are stable against oxidation and reduction, was proposed to enhance the emission efficiency stability orthorhombic CsPbBr3 nanocrystals (NCs). Compared with fresh NCs, a better color purity higher photoluminescence quantum yield were achieved, accompanied gradual blue shift peak increasing ratio. On one hand, passivation effect substantially reduces nonradiative trap centers in NCs. other density functional...
Abstract Hydrochromic materials have attracted widespread attention in the fields of anti‐counterfeiting because their ability reversible light absorption and/or emission properties response to water. Here, for first it is demonstrated that ternary copper halides Cs 3 Cu 2 I 5 nanocrystals (NCs) possess excellent hydrochromic properties. The prepared NCs films can dynamically extract and insert CsI by exposing/removing water realize conversion between blue‐emissive yellow‐emissive CsCu ....
The rapid development of solid-state lighting technology has attracted much attention for searching efficient and stable luminescent materials, especially the single-component white-light emitter. Here, we adopt a facile ion-doping to synthesize vacancy-ordered double perovskite Cs2ZrCl6:Sb. introduction Sb3+ ions with 5s2 active lone pair into Cs2ZrCl6 host stimulates singlet (blue) triplet (orange) states emission ions, their relative intensity can be tuned through energy transfer from...
Pure-red perovskite LEDs (PeLEDs) based on CsPb(Br/I)3 nanocrystals (NCs) usually suffer from a compromise in emission efficiency and spectral stability account of the surface halide vacancies-induced nonradiative recombination loss, phase segregation, self-doping effect. Herein, "halide-equivalent" anion benzenesulfonate (BS- ) is introduced into NCs as multifunctional additive to simultaneously address above challenging issues. Joint experiment-theory characterizations reveal that BS- can...
Achieving high-performance perovskite light-emitting diodes (PeLEDs) with pure-red electroluminescence for practical applications remains a critical challenge because of the problematic luminescence property and spectral instability existing emitters. Herein, high-efficiency Rec. 2020 PeLEDs, simultaneously exhibiting exceptional brightness stability, based on CsPb(Br/I)3 nanocrystals (NCs) capping aromatic amino acid ligands featuring cation-π interactions, are reported. It is proven that...
We proposed a strategy of employing water-induced Cs<sub>3</sub>Bi<sub>2</sub>Br<sub>9</sub>/BiOBr nanocomposites to achieve substantial enhancement in photoluminescence quantum yield by ∼130%.
Recently, metal halide perovskites have attracted tremendous research interest due to their exceptional optoelectronic properties, showing great application potentials in the fields of solar cells, light-emitting diodes, and photodetectors. However, most previously reported perovskite photodetectors are based on polycrystalline films, amounts defects large grain boundaries films unfavorable for further improvement performance device. In this study, high-quality CsPbCl3 microwire networks...
Recently, halide perovskites have attracted tremendous attention because of their great abilities in large-scale and cost-effective manufacturing optoelectronic devices. Here, a novel photodetector configuration was proposed by employing vapor-processed micrometer-scale inorganic CsPbBr3 microplatelets as the light absorber. Temperature-dependent steady-state time-resolved photoluminescence spectra were first recorded to study emission mechanisms carrier recombination dynamics...
Recently, the growing demand for optical anticounterfeiting technology has motivated intensive research in newly emerging halide perovskite quantum dots (QDs). However, poor stability and unsatisfactory fluorescence efficiency of such materials are main obstacles to application reliable anticounterfeiting. In this work, we performed a well-controlled investigation effect surfactant (l-α-phosphatidylcholine, LP) silica encapsulation on emission CsPbBr3 QDs. Because synergetic core/shell...
Recently, white light-emitting devices (WLEDs) based on halide perovskites has been extensively studied. However, the lead toxicity and poor stability of conventional severely hinder their commercial applications. In this study, lead-free double perovskite Cs2AgInCl6 with a broadband emission was fabricated by heat-assisted solution evaporation method, in which compositional engineering sodium (Na+) alloying bismuth (Bi3+) doping performed. The photoluminescence quantum yield promoted from...
Recently, newly emerging lead halide perovskites have attracted great attention as a new class of light emitters in luminescent devices because their superior photoluminescence quantum yield, adjustable emission wavelength, high charge-carrier transport ability, and low-temperature processing technique. However, the poor stability toxicity such materials severely restrict practical applications future commercialization. Therefore, recent efforts been devoted to developing lead-free metal...
Metal halide perovskite nanocrystals (NCs), as a new class of light-emitting and light-harvesting materials, have recently attracted intensive attention for an impressive variety optoelectronic applications. However, the lead toxicity poor stability such materials severely restrict their practical applications future commercialization. Lead-free NCs derivatives, designed by reasonable chemical substitution Pb with other nontoxic elements, are booming attractive alternative to lead-based...
Perovskite light-emitting diodes (LEDs) are emerging light sources for next-generation lighting and display technologies; however, their development is greatly plagued by difficulty in achieving yellow electroluminescence, environmental instability, lead toxicity. Copper halide CsCu
Abstract Single‐source white light‐emitting diodes (WLEDs) with smart regulation of correlated color temperature (CCT) are indispensable for the next generation WLEDs aimed at healthy and high‐quality illumination, where a suitable CCT value is closely related to our emotions circadian rhythm. Herein, this work constructs single‐component emission layer WLED high performance controllable daily lighting through Bi 3+ /Te 4+ dual‐doped Cs 2 SnCl 6 engineering. The efficient energy transfers...
Abstract Lanthanide ions, as dopants, have evoked widespread research interest owing to the rich optical, magnetic, and electrical properties, but their luminescent intensity is always limited by typical concentration quenching. Herein, a holmium‐based double perovskite of Cs 2 NaHoCl 6 reported, which surprisingly breaks through this barrier achieves efficient red‐NIR emission virtue large unit cell, low phonon energy, high content activators, cross relaxation phenomenon between Ho 3+ . The...