A5057983060- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Optical Coatings and Gratings
- Anodic Oxide Films and Nanostructures
- Advanced Sensor and Energy Harvesting Materials
- Advanced Semiconductor Detectors and Materials
- Structural Engineering and Vibration Analysis
- Thermal properties of materials
- Polymer Nanocomposites and Properties
- Nanowire Synthesis and Applications
- Synthesis and Properties of Aromatic Compounds
- Luminescence and Fluorescent Materials
- Metallurgy and Material Forming
- Analytical Chemistry and Sensors
- Polymer Nanocomposite Synthesis and Irradiation
- Smart Materials for Construction
- Polymer crystallization and properties
- Advanced Welding Techniques Analysis
- Advanced Fluorescence Microscopy Techniques
- Supercapacitor Materials and Fabrication
- Organic Light-Emitting Diodes Research
- Advanced Chemical Sensor Technologies
- Fatigue and fracture mechanics
- Semiconductor Quantum Structures and Devices
Guilin University of Technology
2024-2025
University of Southern Mississippi
2017-2021
Guangdong Testing Institute for Product Quality Supervision
2021
Ningbo Product Quality Supervision and Inspection Institute
2021
Hattiesburg Clinic
2017-2019
Shanghai Institute of Technical Physics
2014
Chinese Academy of Sciences
2014
Southeast University
2009
National Cheng Kung University
2008
Tohoku University
1992-1995
Abstract Organic semiconducting donor–acceptor polymers are promising candidates for stretchable electronics owing to their mechanical compliance. However, the effect of electron‐donating thiophene group on thermomechanical properties conjugated has not been carefully studied. Here, thin‐film investigated diketopyrrolopyrrole (DPP)‐based with varying numbers isolated moieties and sizes fused rings in polymer backbone. Interestingly, it is found that these units act as an antiplasticizer,...
Abstract This work examines an additive approach that increases dielectric screening to overcome performance challenges in organic shortwave infrared (SWIR) photodiodes. The role of the high‐permittivity additive, camphoric anhydride, exciton dissociation and charge collection processes is revealed through measurements transient photoconductivity electrochemical impedance. Dielectric reduces binding energy increase efficiency lowers trap‐assisted recombination loss, absence any morphological...
A conjugated polymer semiconductor enables room temperature infrared photodetection from the short- to long-wave infrared.
NIR-SWIR photoresponsive donor–acceptor polymers enable the detection of infrared light when incorporated into bulk heterojunction photodiodes.
Abstract Supercapacitors have emerged as an important energy storage technology offering rapid power delivery, fast charging, and long cycle lifetimes. While extending the operational voltage is improving overall densities, progress remains hindered by a lack of stable n‐type redox‐active materials. Here, new Faradaic electrode material comprised narrow bandgap donor−acceptor conjugated polymer demonstrated, which exhibits open‐shell ground state, intrinsic electrical conductivity, enhanced...
Abstract Conductive polymers largely derive their electronic functionality from chemical doping, processes by which redox and charge‐transfer reactions form mobile carriers. While decades of research have demonstrated fundamentally new technologies that merge the unique these materials with versatility macromolecules, doping resultant material properties are not ideal for many applications. Here, it is open‐shell conjugated comprised alternating cyclopentadithiophene thiadiazoloquinoxaline...
Thermoelectric devices based on conducting polymers are promising energy conversion systems; however, the intrinsic semiconducting nature inherent to macromolecular architecture of common conjugated (CPs) in their neutral form requires doping impart electrical conductivity and optimization complex dopant–polymer interactions order enhance thermoelectric performance. Therefore, designing synthesizing CPs that have readily tunable properties can be doped a facile manner using stable...
Branching closer to the backbone causes tighter packing in side-chain direction and lower side chain dynamics.
Abstract Infrared organic photodetector materials are investigated using transient absorption spectroscopy, demonstrating that ultrafast charge generation assisted by polymer aggregation is essential to compensate for the energy gap law, which dictates excited state lifetimes decrease as band narrows. Short sub‐picosecond singlet exciton measured in a structurally related series of infrared‐absorbing copolymers consist alternating cyclopentadithiophene electron‐rich “push” units and strong...
This work studies organic bulk heterojunction photodiodes with a wide spectral range capable of imaging out to 1.3 μm in the shortwave infrared. Adjustment donor-to-acceptor (polymer:fullerene) ratio shows how blend composition affects density states (DOS) which connects materials and optoelectronic properties provides insight into features relevant understanding dispersive transport recombination narrow bandgap devices. Capacitance spectroscopy transient photocurrent measurements indicate...
Abstract The applications of thermal interface material (TIM) based on boron nitride (BN)‐filled polymer composites are often constrained by weak interfacial interactions between BN and the matrix. In this work, hyperbranched (H‐Si69) was synthesized polycondensation surface using a sulfur‐containing coupling agent. agent modified (g‐BN), natural rubber (NR)/g‐BN were prepared with higher conductivity mechanical properties. (0.665 W/mK), tensile strength (19.78 MPa), elongation at break...
Abstract For thermal conductive boron nitride (BN)/polymer composites, an overabundance of BN in the formulation may significantly impair mechanical integrity, thereby restricting their applicability practical scenarios. In this work, we introduced a novel modifying agent, which was grafted onto exterior following high‐temperature calcination. The resultant modified demonstrated marked improvement conductivity and characteristics natural rubber (NR) composites. Upon incorporating filler...
Donor-acceptor (DA) conjugated polymers (CPs) with narrow bandgaps and open-shell (diradical) character represent an emerging class of materials whose rich behavior emanates from their collective electronic properties diminished electron pairing. However, the structural heterogeneities that define these complicate bandgap control at low energies connections linking topology, exchange interactions, (opto)electronic functionality remain nascent. To address challenges, we demonstrate...
Transmission spectra were measured for anodic alumina films prepared in several acid solutions. The anodized a phosphoric solution are the most appropriate use infrared range, since impurity absorptions weak those films. refractive indices of phosphoric-acid evaluated by measurements transmittance and reflectance. index decreases either extending anodization time or immersing film sulfuric solution. This phenomenon is elucidated well considering pore widening due to dissolution alumina....
We demonstrate the preparation of uniformly distributed poly(3-hexylthiophene) (P3HT) nanowire (NW) networks on a variety substrates. studied changes in optical, electronic, and morphological properties upon sequential doping by 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) UV–vis spectroscopy, atomic force microscopy (AFM), Kelvin probe (KPFM), electrical conductivity measurements. At moderate dopant concentration 250 μg/mL, P3HT NW retain their features with clear evolution...
The size and the shape of micropores in anodic alumina films are studied by electron microscope observation mercury intrusion porosimetry. Pores have conical shapes with ~10-nm diameters widened at rate ~0.05 nm/min immersion a sulfuric acid solution. Such pores give rise to refractive-index distribution anisotropy films. By analyzing interference fringes, we find that graded-index profile, as well birefringence, exists experimental results good agreement theoretical predictions.
The temperature- and bias-dependent photocurrent spectra of very long wavelength GaAs/AlGaAs quantum well infrared photodetectors (QWIPs) are studied using spectroscopic measurements corresponding theoretical calculations. It is found that the peak response will shift as bias temperature change. Aided by band structure calculations, we propose a model double excited states explain experimental observations well. In addition, working mechanisms quasi-bound state confined in well, including...
A prominent polarization function appears in anodic alumina films when oxidation is carried out at low temperature around 0°C. The film that anodized 25 V and 0°C exhibits the extinction ratio of >30 dB/mm wavelengths 0.6-1.6 µm. seems to originate from unoxidized aluminum, which increases upon lowering anodization temperature. Using function, we fabricated a polarizer consisting laminated films.
In article number 1909805, Jason D. Azoulay and co-workers demonstrate the design development of open-shell conjugated polymers that are electrically conductive in their native "undoped" form. A comparative study structural variants, processing methodologies, morphological features conductivity could be tuned over many orders magnitude to achieve a record high for an undoped material 8.18 S cm−1.
As for a new type of joint steel structures, cast joints are used large and complicated structures. Combined with the analysis Y-type New Railway Station Guangzhou, performance this is discussed. With help ANSYS software, distribution stress, process plasticity spreading failure mechanism analyzed. In order to further investigate stress concentration, parametric study was conducted considering influence factors, such as corner fillet radius different branch members, member thickness,...
Abstract In this paper, plastic mold steel S136 and SUP were studied for microstructural observation mechanical properties through metallographic, SEM, EDS, XRD, hardness test impact test. The results showed that after the same heat treatment, martensite structure of was denser, carbides more uniform finer, slightly lower but toughness greatly increased compared with S136. residual austenite content 2.46% 10%, respectively, treatment 50.1 HRC 49.1 HRC, respectively. 90.6 J 299.1 J.
A simple method is proposed for the fabrication of an optical polarizer with a large aperture by use anodic alumina films. The size 10 × mm(2), extinction ratio shown to be larger than 35 dB, and insertion loss less 1 dB at wavelength 1.55 µm.