A5006342194- Organic Light-Emitting Diodes Research
- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Advanced Sensor and Energy Harvesting Materials
- Luminescence and Fluorescent Materials
- Molecular Junctions and Nanostructures
- Lanthanide and Transition Metal Complexes
- Semiconductor materials and devices
- Perovskite Materials and Applications
- Analytical Chemistry and Sensors
- Magnetism in coordination complexes
- Thin-Film Transistor Technologies
- Hip and Femur Fractures
- Solid-state spectroscopy and crystallography
- Mechanical and Optical Resonators
- Fuel Cells and Related Materials
- Advancements in Battery Materials
- Advanced Memory and Neural Computing
- Membrane-based Ion Separation Techniques
- Bone fractures and treatments
- Quantum Dots Synthesis And Properties
- Metal and Thin Film Mechanics
- Dendrimers and Hyperbranched Polymers
- Gas Sensing Nanomaterials and Sensors
- Non-Invasive Vital Sign Monitoring
Fudan University
2013-2024
University of Shanghai for Science and Technology
2022
West Virginia University
2009-2010
Dong-A University
2007
Abstract Lead‐based perovskite light‐emitting diodes (PeLEDs) have exhibited excellent purity, high efficiency, and good brightness. In order to develop nontoxic, highly luminescent metal halide materials, tin, copper, germanium, zinc, bismuth, other lead‐free perovskites been developed. Here, a novel 0D manganese‐based (Mn‐based) organic–inorganic hybrid with the red emission located at 629 nm, photoluminescence quantum yield of 80%, millisecond level triplet lifetime is reported. When...
The chelate phosphine oxide ligand bis(2-(diphenylphosphino)phenyl) ether (DPEPO) was used as a unit neutral to prepare the complex Eu(TTA)(3)(DPEPO) 1 (TTA = 2-thenoyltrifluoroacetonate). Compound has photoluminescence (PL) quantum yield of 55.3%, which is more than twice PL Eu(TTA)(3)(TPPO)(2) (TPPO triphenylphosphine oxide). Investigation indicated that DPEPO in mezzo first triplet excited energy level (T(1)) between singlet (S(1)) and T(1) TTA, may support one additional transfer...
Three novel dendritic europium complexes containing grafted carbazole units as their functional peripheries were prepared and characterized. The Förster energy transfer from the of to β-diketonates well ligands central Eu(III) ions in these has been demonstrated. Under indirect excitation units, a characteristic red emission peak at 615 nm due ion transition 5D0 → 7F2 was observed for solution or solid films. As result light-harvesting site isolation dendrons, compared with reference...
It is demonstrated experimentally that the effect of a LiF buffer layer inserted at ITO\N,N′-bis(1-naphthyl)-N,N′-diphenyl-1,1′ biphenyl 4,4′-dimaine (NPB) interface on hole injection greatly dependent initial barrier height (IBH) existing interface. Only for large IBH, will introduction show improvement effect. For small one, it weaken injection. These phenomena are explained in terms tunneling model and calculations based this good agreement with experimental results. This further confirms...
A LiF-buffered silver cathode has been used in organic light-emitting devices (OLEDs) with structure indium–tin–oxide/N,N′-bis-(1-naphthl)-diphenyl-1,1′-biphenyl-4,4′-diamine (50 nm)/Alq3 (100 nm)/cathode. The efficiency of electron injection from the is strongly dependent on thickness LiF buffer layer. While a layer thinner than 1.0 nm leads to higher turn-on voltage and decreased electroluminescent (EL) efficiency, 3.0 significantly enhances results lower increased EL efficiency....
We studied concentration quenching of electroluminescence (EL) in organic light-emitting diodes with a neat fac-tris(2-phenylpyridinato-N, C2′) iridium (III) [Ir(ppy)3] emitting layer different thicknesses sandwiched between electron and hole blocking layers. The intensity the green emission decreased rapidly increasing Ir(ppy)3 thickness was reversely correlated tail band emission. overall light output power reached minimum at 4 nm, attained saturated value for thicker than 6 nm. These...
Abstract The perovskite light‐emitting diode (PeLED) based on lead has the advantages of excellent purity, high efficiency, and good brightness. In order to develop a highly luminescent deep blue halide light emitting diode, here, two‐dimensional layered owning photoluminescence quantum yield 80% at 445 nm is reported. addition, maximum recording brightness peak external efficiency PeLED 1315 cd m −2 3.08%, respectively, which outdoes that previously reported PeLEDs. half‐life device reaches...
Tris (8-hydroxyquinoline) aluminum (Alq3)-based organic light-emitting devices using an amphiphilic molecule sodium stearate (NaSt) layer between (Al) cathode and Alq3 have been fabricated. By comparing the with those containing a LiF buffer layer, results demonstrate that both almost same high electroluminescent (EL) brightness but former is more stable. The property of NaSt considered as main reason for this enhancement.
We report the photoluminescence (PL) properties measured in situ from vacuum-deposited organic films of tris-(8-hydroxyquinoline) aluminum (Alq) doped with 4-(dicyanomethylene)-2-methyl-6(p-dimethylaminostyryl)-4H-pyran (DCM), where red emission guest molecules is due to Förster energy transfer excited state host guest. Both bare DCM-doped Alq (Alq:DCM) and bilayer Alq/Alq:DCM have been studied, thickness overlayer continuously varied latter case. The PL spectra structure contain no...
Flexible and wearable piezoresistive sensors keep attracting attention in many areas due to their wide application. materials with high conductivity are crucial be explored for flexible sensors. In this work, a mild treatment method utilizing cosolvent of formamide methanol dramatically improve the film poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) was developed. The PEDOT:PSS improved from 0.3 1287 S/cm through double treatments methanol. enhancement is because...
The morphologic and luminescent behaviors of various 4-(dicyanomethylene)-2methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) containing films have been investigated. This involves pure DCM layers deposited on top a tris-(8-hydroxyquinoline) aluminum (Alq) layer or positioned between two Alq layer, DCM-doped films, periodically arranged Alq/DCM multilayer structures. occurrence over period time aggregation permeation molecules at room temperature temperatures as low ∼260 K is found in all the...
Abstract A six-membered chelated iridium complex containing aza-aromatic ligand is prepared. Emission color tuning from yellow to deep red observed for electroluminescent devices with different doping concentrations.
The changes in the electrical conductivity of an indium-tin-oxide/poly [2-methoxy-5-(2'-ethylhexyloxy)-1,4-phyenylenevinylene] (MEH-PPV)/Al structure under compressive stresses were measured. current recorded at 3 V showed a nearly linear characteristic response between 0.25 and 1.1 MPa with sensitivity 5.0 muA/KPa maximal piezoresistance coefficient ~1.1 times 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-4</sup> Pa...
Organic light-emitting devices with the structure of indium-tin-oxide (ITO)/4, 4', 4''-tris(N-carbazolyl)-triphenylamine (TCTA, different thicknesses)/2-pyrenyl-9-phenyl-9-pyrenylfluorene (2P9PPF) (30 nm)/bathocuproine (BCP) (40 nm)/Mg : Ag (250 nm) have been investigated. The effect TCTA layer on performance blue-emitting has studied. It is demonstrated that inserted 8 nm thick neighbouring anode device leads to efficiency and luminance increasing ten times, reaching 3.8 cd A−1 at 9 V 17...
In this paper, we report on the strong piezoresistance effect small molecule organic semiconductors. We fabricated and measured indium-tin-oxide (ITO)/tris- (8-hydroxyquinoline) aluminium (Alq, 80?nm) (or bathocuproine (BCP, 70?nm))/Al devices. simple devices, current under constant bias square wave pulses with a load-produced varying pressure applied The shows high sensitivity to pressure. related mechanism is also discussed. Our results clearly demonstrate that some of semiconductors show...