A5003276517- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Organic Electronics and Photovoltaics
- Fuel Cells and Related Materials
- Advancements in Battery Materials
- Advanced Thermoelectric Materials and Devices
- Liquid Crystal Research Advancements
- Organic and Molecular Conductors Research
- Perovskite Materials and Applications
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced battery technologies research
- Ionic liquids properties and applications
- Block Copolymer Self-Assembly
- Porphyrin and Phthalocyanine Chemistry
- Extraction and Separation Processes
- Molecular Junctions and Nanostructures
- Polymer composites and self-healing
- Metal-Organic Frameworks: Synthesis and Applications
- Photochromic and Fluorescence Chemistry
- Electron and X-Ray Spectroscopy Techniques
- Advanced Memory and Neural Computing
- Inorganic Chemistry and Materials
- Topic Modeling
- Electrocatalysts for Energy Conversion
University of Chicago
2017-2025
Argonne National Laboratory
2018-2024
University of Central Lancashire
2022
Fudan University
2021
Alex's Lemonade Stand Foundation
2019
University of California, Santa Barbara
2014-2017
University of California, Berkeley
2011-2015
Santa Barbara City College
2015
Material (Belgium)
2015
Lawrence Berkeley National Laboratory
2012-2013
A record high OFET hole mobility, as 23.7 cm2/Vs, is achieved in macroscopic aligned semiconducting polymers. The mobility insensitive to the polymer molecular weight. Polymer chains are along fiber facilitate intrachain charge transport. As a service our authors and readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for online delivery, but not copy-edited or typeset. Technical support issues arising from (other than...
Solution processable semiconducting polymers with excellent film forming capacity and mechanical flexibility are considered among the most progressive alternatives to conventional inorganic semiconductors. However, random packing of polymer chains disorder matrix typically result in low charge transport mobilities (10(-5)-10(-2) cm(2) V(-1) s(-1)). These compromise their performance development. Here, we present a strategy, by utilizing capillary action, mediate chain self-assembly...
The development of organic semiconductors for use in thermoelectrics requires the optimization both their thermopower and electrical conductivity. Here two fundamentally different doping mechanisms are used to investigate thermoelectric properties known high hole mobility polymers: poly 3‐hexylthiophene (P3HT), poly(2,5 ‐ bis(3‐tetradecylthiophen‐2‐yl)thieno[3,2‐b]thiophene) (PBTTT‐C 14 ), poly(2,5‐bis(thiphen‐2‐yl)‐(3,7‐diheptadecantyltetrathienoacene)) (P2TDC 17 ‐FT4). small molecule...
The orientational correlation length of domains in a semiconducting polymer controls its thermoelectric performance.
A new class of high-performance n-type organic thermoelectric materials, self-doping perylene diimide derivatives with modified side chains, is reported. These materials achieve the highest performance solution-processed reported to date, power factors as high 1.4 μW/mK2. results demonstrate that molecular design a promising strategy for enhancing performance. As service our authors and readers, this journal provides supporting information supplied by authors. Such are peer reviewed may be...
Abstract This roadmap includes the perspectives and visions of leading researchers in key areas flexible printable electronics. The covered topics are broadly organized by device technologies (sections 1–9), fabrication techniques 10–12), design modeling approaches 13 14) essential to future development new applications leveraging electronics (FE). interdisciplinary nature this field involves everything from fundamental scientific discoveries engineering challenges; synthesis materials via...
Pluripotency, which is defined as a system not fixed to its developmental potentialities, typically associated with biology and stem cells. Inspired by this concept, we report synthetic polymers that act single "pluripotent" feedstock can be differentiated into range of materials exhibit different mechanical properties, from hard brittle soft extensible. To achieve this, have exploited dynamic covalent networks contain labile, thia-Michael bonds, whose extent bonding thermally modulated...
Shields up! Post-synthetic modification of the secondary building units in metal-organic framework UiO-66 (Zr6O4(OH)4(O2CR)12) by dehydration and subsequent grafting LiOtBu yields a solid Li(+) electrolyte with conductivity 1.8×10(-5) S cm(-1) at 293 K. As leads to screening anionic charge, activation energy for ionic conduction is significantly lower than when introduced through deprotonation.
Charging ahead: Separate values for the simultaneous electronic and ionic conductivity of a conjugated polymer containing poly(3-hexylthiophene) poly(ethylene oxide) (P3HT-PEO) were determined by using ac impedance dc techniques. P3HT-PEO was used as binder, transporter charge Li+ ions in LiFePO4 cathode, which incorporated into solid-state lithium batteries (see picture; TFSI=bis(trifluoromethane sulfone)imide).
We demonstrate how processing methods affect the thermoelectric properties of thin films a high mobility semiconducting polymer, PBTTT. Two doping were compared: vapor deposition (tridecafluoro-1,1,2,2-tetrahydrooctyl)trichlorosilane (FTS) or immersion in solvent containing 4-ethylbenzenesulfonic acid (EBSA). Thermally annealed, doped by FTS deposited from yield Seebeck coefficient (α) at electronic conductivity (σ) and, turn, large power factor (PF = α2σ) ∼100 μW m–1 K–2. The FTS-doped α...
Although extensive efforts have been devoted to understanding electronic transport in conjugated polymers, little is known about their ionic conduction characteristics relation polymer chemistry, processing, and morphology. This work presents a combined computational experimental study on morphology ion thin-film blends of polythiophene derivatives bearing oligoethylene glycol side-chains lithium bis(trifluoromethanesulfonyl)imide (LiTFSI). Using molecular dynamics (MD) simulation, we show...
Tertiary amines covalently tethered to electron-deficient aromatic molecules by alkyl spacers enable solid-state n-doping.
Abstract Through replacement of traditional energy sources with sunlight as the heat source, solar steam generation has emerged a promising technology for water purification and residuals management. Despite significant efforts to develop efficient photothermal materials devices, challenges associated scalable fabrication high‐performance remain. Moreover, most existing methods cannot be easily engineered produce steam‐generating devices both arbitrary control over shape high efficiency....
Block copolymer electrolytes (BCE) such as polystyrene-block-poly(ethylene oxide) (SEO) blended with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and composed of mechanically robust insulating rubbery conducting nanodomains are promising solid-state for Li batteries. Here, we compare ionic solvation, association, distribution, conductivity in SEO-LiTFSI BCEs their homopolymer PEO-LiTFSI analogs toward a fundamental understanding the maximum transport mechanisms function salt...
The main objective of this work is to study charge transport in mixtures poly(3-hexylthiophene)-b-poly(ethylene oxide) (P3HT–PEO) block copolymers and lithium bis(trifluoromethanesulfonyl) imide salt (LiTFSI). P3HT-rich microphase conducts electronic charge, while the PEO-rich ionic charge. nearly symmetric P3HT–PEO copolymer used self-assembles into a lamellar phase. In contrast, morphologies asymmetric with P3HT as major component are dominated by nanofibrils. A combination ac dc impedance...
We report the controlled nanomorphology of semiconducting polymers on chemically and mechanically stable nanogrooved polymer substrates. By employing silicon dioxide thin films with finely adjusted thicknesses substrates, oriented aligned along nanogrooves were obtained. Organic field-effect transistors (OFETs) fabricated from polymer, poly[4-(4,4-dihexadecyl-4H-cyclopenta[1,2-b:5,4-b']dithiophen-2-yl)-alt-[1,2,5]thiadiazolo-[3,4-c]pyridine] (PCDTPT), yielded saturation hole mobilities as...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHigh Mobility Organic Field-Effect Transistors from Majority Insulator BlendsMichael J. Ford†‡⊥, Ming Wang‡⊥§, Shrayesh N. Patel⊥∥, Hung Phan‡⊥§, Rachel A. Segalman†⊥∥, Thuc-Quyen Nguyen‡⊥§, and Guillermo C. Bazan*†‡⊥§View Author Information† ‡ ⊥ § †Materials Department, ‡Center for Polymers Solids, ⊥Mitsubishi Chemical Center Advanced Materials, §Department of Chemistry Biochemistry, ∥Department Engineering, University California, Santa...
Conductive polymers such as PEDOT:PSS hold great promise flexible thermoelectric devices. The power factor of is small relative to inorganic materials because the Seebeck coefficient small. Ion conducting have previously been demonstrated very large coefficients, and a major advantage over inorganics high room temperature ionic conductivity. Notably, demonstrates significant but short-term increase in which attributed contribution. By controlling whether electrochemistry occurs at...
This work aims to develop a detailed mechanistic understanding of the role graft polymer architecture on lithium ion (Li+) transport in poly(ethylene oxide)-based electrolytes. Specifically, we compare Li+ oxide) (PEO) versus poly(oligo oxyethylene methacrylate) (POEM) polymers doped with bis(trifluoromethanesulfonyl) (LiTFSI) salts, using both experimental electrochemical characterization and molecular dynamics (MD) simulations. Our results indicate that POEM exhibits range relaxation...
Cross-linked polymer electrolytes containing structurally dynamic disulfide bonds have been synthesized to investigate their combined ion transport and adhesive properties. Dynamic network polymers of varying cross-link densities are via thiol oxidation a bisthiol monomer, 2,2'-(ethylenedioxy)diethanethiol, tetrathiol cross-linker, pentaerythritol tetrakis(3-mercaptopropionate). At optimal loading lithium bis(trifluoromethane-sulfonyl-imide) (LiTFSI) salt, the ionic conductivities (σ) at 90...
Knowledge of intrinsic properties is central importance for materials design and assessing suitability specific applications. Self-assembling block copolymer electrolytes (BCEs) are great interest applications in solid-state energy storage devices. A fundamental understanding ion transport properties, however, hindered by the difficulty deconvoluting extrinsic factors, such as defects, from presence interfaces between domains. Here, we quantify a model BCE system consisting...
Molecularly doped conjugated polymers with polar side chains are an emerging class of conducting materials exhibiting enhanced and thermally stable conductivity. Here, we study the electronic conductivity (σ) corresponding thermal stability two polythiophene derivatives comprising oligoethylene glycol chains: one having oxygen attached to thiophene ring (poly(3-(methoxyethoxyethoxy)thiophene) (P3MEET)) other a methylene spacer between (poly(3-(methoxyethoxyethoxymethyl)thiophene) (P3MEEMT))....
Two-dimensional (2D) inorganic materials have emerged as exciting platforms for (opto)electronic, thermoelectric, magnetic, and energy storage applications. However, electronic redox tuning of these can be difficult. Instead, 2D metal-organic frameworks (MOFs) offer the possibility through stoichiometric changes, with several examples featuring one to two events per formula unit. Here, we demonstrate that this principle extended over a far greater span isolation four discrete states in MOFs...
Block copolymers that can simultaneously conduct electronic and ionic charges on the nanometer length scale serve as innovative conductive binder material for solid-state battery electrodes. The purpose of this work is to study charge transport poly(3-hexylthiophene)-b-poly(ethylene oxide) (P3HT-PEO) electrochemically oxidized with lithium bis(trifluoromethanesulfonyl) imide (LiTFSI) salt in context a charge/discharge cycle. We use three-terminal electrochemical cell enables simultaneous...