A5016035604- Organic Light-Emitting Diodes Research
- Advanced Memory and Neural Computing
- Organic Electronics and Photovoltaics
- Ferroelectric and Negative Capacitance Devices
- Conducting polymers and applications
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Multicomponent Synthesis of Heterocycles
- Aluminum Alloy Microstructure Properties
- Graphene research and applications
- Neural Networks and Reservoir Computing
- Aluminum Alloys Composites Properties
- Advanced Welding Techniques Analysis
- Semiconductor materials and devices
- Luminescence and Fluorescent Materials
- Neuroscience and Neural Engineering
- Catalytic Cross-Coupling Reactions
- Catalytic Alkyne Reactions
- Nanomaterials for catalytic reactions
- Covalent Organic Framework Applications
- Photoreceptor and optogenetics research
- Transition Metal Oxide Nanomaterials
- Hydrogen embrittlement and corrosion behaviors in metals
- X-ray Diffraction in Crystallography
- Welding Techniques and Residual Stresses
Micron (United States)
2024
University of Pittsburgh
2016-2021
University of Tehran
2011-2019
Shiraz University of Technology
2009-2015
Shiraz University
2009-2011
Persian Gulf University
2011
Abstract Brain‐inspired neuromorphic computing has the potential to revolutionize current paradigm with its massive parallelism and potentially low power consumption. However, existing approaches of using digital complementary metal–oxide–semiconductor devices (with “0” “1” states) emulate gradual/analog behaviors in neural network are energy intensive unsustainable; furthermore, emerging memristor still face challenges such as nonlinearities large write noise. Here, an electrochemical...
Abstract In today's era of big‐data, a new computing paradigm beyond von‐Neumann architecture is needed to process these large‐scale datasets efficiently. Inspired by the brain, which better at complex tasks than even supercomputers with much efficiency, field neuromorphic has recently attracted immense research interest and can have profound impact in next‐generation computing. Unlike modern computers that use digital “0” “1” for computation, biological neural networks exhibit analog...
This paper reports the first known investigation of power dissipation and electrical breakdown in aerosol-jet-printed (AJP) graphene interconnects. The performance aerosol-jet printed was characterized using Transmission Line Method (TLM). resistance decreased with increasing printing pass number (n); lowest sheet measured 1.5 kΩ/sq. for n = 50. role thermal (RTH) studied a combination thermometry infrared (IR) imaging. A simple lumped model ([Formula: see text]) COMSOL Multiphysics used to...
The kinetics and mechanism of the reaction cyclometalated complexes [PtAr(C−N)(SMe2)], 1, in which Ar is Ph, p-MeC6H4, or p-MeOC6H4, C−N either ppy (deprotonated 2-phenylpyridine) bhq benzo[h]quinoline), with 1,1′-bis(diphenylphosphino)ferrocene, dppf, were studied using UV−visible 31P NMR spectroscopies. When 0.5 equiv dppf was added, binuclear Pt(II) complex [Pt2Ar2(C−N)2(μ-dppf)], 2, formed a good yield. fully characterized multinuclear (1H, 31P, 195Pt) spectroscopy, structure...
This letter reports efficient near-infrared (NIR) electroluminescence (EL) of organic light-emitting diodes (OLEDs) based on two donor-pi-acceptor oligomers. The energy gap can be tuned by changing the conjugated length, strengths acceptor component, and nonplanarity. EL with peak emission wavelengths 775 905 nm were observed from NIR External quantum efficiencies up to 3.54%, electrical-to-optical power 15.8 mW/W, turn-on voltage 4.5 V achieved in OLEDs these emitters.
Some new 1,4-distyrylbenzene derivatives were synthesized by using immobilized palladium nanoparticles on silica-bonded N-propyl morpholine (PNP-SBNPM) as a heterogeneous catalyst. These one-pot reactions afforded range of stereoselective, symmetrical (E)-1,4-distyrylbenzene with high yields (78-90%). The green catalyst system is recyclable and allows facile product isolation. recycled could be reused six times without appreciable loss catalytic activity.
Neuromorphic computing has the great potential to enable faster and more energy‐efficient by overcoming von Neumann bottleneck. However, most emerging nonvolatile memory (NVM)‐based artificial synapses suffer from insufficient precision, nonlinear synaptic weight update, high write voltage, switching latency. Moreover, spatiotemporal dynamics, an important temporal component for cognitive in spiking neural networks (SNNs), are hard generate with existing complementary...
The synthesis of a novel recoverable catalyst based on graphene and NHC for the cross dehydrogenative coupling aldehydes is described, as well amides construction C–C bonds.
By reversibly intercalating ions between the layers of two-dimensional graphene, Feng Xiong and co-workers at Pitt develop a novel artificial synapse for neuromorphic computing, as described in article number 1802353. With over 250 tunable analog states, good energy efficiency, promising scalability, these electrochemical synapses can lead to hardware implementation neural networks hence prevalent use intelligence.
In this study isatin and its novel Schiff base as a new red fluorescent material for organic light emitting diodes (OLEDs) are used color OLEDs. We fabricated OLEDs with the configuration of indium tin oxide/4.4′-Bis(N-carbazolyl-1,1′-biphenyl/red emitter/HGH2/Alq3/Li/Al which electrical optical properties devices have been investigated. Their photoluminescence electroluminescence were examined compared. The electroluminescent spectra these materials ranges from 593 to 645 nm their bandgaps...
Blue to red organic light-emitting diodes based on a series of newly synthesized distyrylbenzenes have been demonstrated. Their optical properties theoretically and experimentally studied in order inquire into the substitution effects (such as electron-donating, electron-withdrawing, steric hindrance) emission color. Density functional theory at B3LYP/6-311+G(d) level calculation was employed obtain molecular structures highest occupied orbital lowest unoccupied surfaces. Electroluminescence...
Neuromorphic computing has recently emerged as a promising paradigm to overcome the von-Neumann bottleneck and enable orders of magnitude improvement in bandwidth energy efficiency. However, existing complementary metal-oxide-semiconductor (CMOS) digital devices, building block our system, are fundamentally different from analog synapses, biological neural network—rendering hardware implementation artificial networks (ANNs) not scalable terms area power, with CMOS devices. In addition,...
In this paper, two new organic light emitting diodes in near infrared (NIR) range were fabricated based on acceptor-donor-acceptor (A-D-A) and donor-acceptor-donor (D-A-D) oligomers. We found that, the electroluminescent (EL) spectra of these oligomers which have wavelength from 900 to 1150 nm. The maximum external quantum efficiencies (EQE) electrical optical power for devices measured they be (3.3%, 16.7 mW/W) (1.32%, 6.6 A-D-A D-A-D respectively.
High energy ball milling of two initial quaternary and binary powder mixtures Mg 1.75 Nb 0.125 C Ni 2 has been carried out in pure argon atmosphere for the synthesis nanocrystalline powders based on intermetallic compound.A planetary mill was employed using a to weight ratio 20:1 various time 5, 10, 15, 20, 30 60 h.Characterization crystal structure milled products X-ray diffractometry exhibited formation Ni-based nanocrystallites after ≈ 5 h both mixture.However, its volume fraction greater...
In this paper, we present the advantages of using a CMOS wafer bonded to cell array by advanced interconnect, which shows significant 3D-NAND memory window (MW) improvement. This paper discusses physics with reliability dependence on thermal budget and associated process optimizations needed mitigate adverse effects. The stacking approach is key enabler for future scaling roadmap.
The authors report a quantum-dot (QD) organic light-emitting diode (OLED) structure formed on Si substrate. Here, the junction area is defined by lithographically patterned oxide layer substrate and designed to allow wide range of scalability lateral dimension down nanometer range. device comprises: (from top) indium-tin-oxide (70-nm thickness) as hole-injecting transparent anode, Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (30 nm) hole-transport layer, Poly(N-vinylcarbazole) (20...
Structure property relationships have been studied for polar and non-polar electro-luminescent molecules. The chromophore with a large red-shift shows lower turn-on voltage than its counterparts. <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I</i> - xmlns:xlink="http://www.w3.org/1999/xlink">V</i> curves show characteristic diode behavior. external quantum efficiency measurements the molecule four times higher other