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...

Abstract Electromagnetic actuators (EMAs) serve the majority of motion control needs in fields ranging from industrial robotics to automotive systems and biomedical devices, due their unmatched combination speed, precision, force, scalability. This paper describes design fabrication miniature soft EMAs that operate based on Lorentz force principle. The are fabricated silicone polymer, liquid metal (LM) alloy (eutectic gallium indium, EGaIn), magnetic (NdFeB) powder. They small, intrinsically...

Organic solar cells utilizing the small molecule donor 7,7′‐(4,4‐bis(2‐ethylhexyl)‐4H‐silolo[3,2‐b:4,5‐b′]dithiophene‐2,6‐diyl)bis(6‐fluoro‐4‐(5′‐hexyl‐[2,2′‐bithiophen]‐5‐yl)benzo[c][1,2,5] thiadiazole) ( p ‐DTS(FBTTh 2 ) and polymer acceptor poly{[N,N′‐bis(2‐octyldodecyl)‐1,4,5,8‐naphthalenedicarboximide‐2,6‐diyl]‐alt‐5,5′‐(2,2′‐bithiophene)}(P(NDI2OD‐T2)) are investigated a power conversion efficiency of 2.1% is achieved. By systematic study bulk heterojunction (BHJ) organic photovoltaic...

A judicious layer-by-layer assembly strategy has been developed to rationally integrate graphene quantum dots with metal nanocrystals for multifarious catalysis.

The distribution of dopant sites in doped poly(3-hexylthiophene) (P3HT) thin films is characterized using optical absorption, grazing-incidence X-ray diffraction, and conducting atomic force microscopy (c-AFM). It shown that can be directly observed c-AFM the solution temperature dramatically impacts phase separation conductivity spin-cast films. As a service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may...

Three stereoisomers of DPP(TBFu)2 are separated and identified to investigate the effects stereoisomerism on crystal structures optoelectrical properties. The FET mobility sensitive stereoisomers, in which mesomer possesses highest carrier greatest crystallization tendency dominate spin-cast films as-synthesized stereoisomeric mixture. As a service our authors readers, this journal provides supporting information supplied by authors. Such materials peer reviewed may be re-organized for...

The mechanism of electrical instability and the double slope p-type organic field-effect transistors (OFETs) fabricated from low-bandgap donor–acceptor copolymers are resolved. Those polymers enable electron conduction in device, which leads to trapping consequent formation –SiO−. This causes a turn-on voltage shift, hole-mobility increase, double-slope occurrence. These findings tremendously impact molecular design device engineering OFETs. As service our authors readers, this journal...

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...

Abstract The field effect transistor (FET) is arguably one of the most important circuit elements in modern electronics. Recently, a need has developed for flexible electronics variety emerging applications. Examples include form‐fitting healthcare‐monitoring devices, displays, and radio frequency identification tags. Organic FETs (OFETs) are viable candidates producing such devices because they incorporate semiconducting π‐conjugated materials, including small molecules conjugated polymers,...

Four conjugated D–A copolymers using benzo[2,1,3]thiadiazole fragments with varying degrees of fluorination as the acceptor structural units have been synthesized and characterized.

A novel wide-gap conjugated polymer PhF2,5 (Eg = 1.9 eV) is designed to contain alternating cyclopentadithiophene and difluorophenylene unit with the goal of favoring unipolar organic field effect transistor characteristics. The higher lowest unoccupied molecular orbital energy increases barrier electron injection, leading transport on/off ratios, without sacrificing desirable high hole mobilities.

Conducting AFM reveals a continuous conduction network of TiO2-graphene composite in DSSC due to more intimate contact between the smaller sized nanosheets,which reduces internal resistance at TiO2/TiO2 and TiO2/FTO interfaces ultimately leads faster efficient electron transport photoanode. As service our authors readers, this journal provides supporting information supplied by authors. Such materials are peer reviewed may be re-organized for online delivery, but not copy-edited or typeset....

The variation of the conductivity a Geobacter biofilm and an osmium redox complex film with temperature has either positive or negative correlation depending on how ambient moisture is regulated.

Many high charge carrier mobility ( μ ) active layers within organic field‐effect transistor (OFET) configurations exhibit non‐linear current–voltage characteristics that may drift with time under applied bias and, when applying conventional equations for ideal FETs, give inconsistent values. This study demonstrates the introduction of electron deficient fullerene acceptors into thin films comprised high‐mobility semiconducting polymer PCDTPT suppresses an undesirable “double‐slope” in...

In-depth understanding of the doped and de-doped states CPE-K, a unique, water-soluble, highly conductive polymer.

Electrical instability and nonideality due to undesirable electron injection are often‐encountered problems for high‐mobility organic field‐effect transistors (OFETs) with low‐bandgap polymer semiconductors. Due trapping the resulting accumulation of negative charges on silicon dioxide dielectric, transfer curves deviate from ideality characteristics double‐slopes observed as devices operated extended periods time. One way circumvent those is use an electron‐acceptor additive, such fullerene...

Understanding and controlling the optoelectronic properties of organic semiconductors at molecular level remains a challenge due to complexity chemical structures intermolecular interactions. A common strategy address this is utilize both experimental computational approaches. In contribution, we show that density functional theory (DFT) calculation useful tool provide insights into bonding, electron population distribution, optical transitions adducts between conjugated molecules Lewis...

Abstract A mechanistic study of the DNA interfacial layer that enhances photoresponse in n‐type field‐effect transistors (FET) and lateral photoconductors using a solution‐processed fullerene derivative embedded with disperse‐red dye, namely PCBDR, is reported. Incorporation thin simultaneously leads to increasing electron injection from non‐Ohmic contacts into PCBDR active dark photocurrent under irradiation. Such features lead observation enhancement photoresponsivity FETs up 10 3 . Kelvin...

Synthetic design allowing predictive control of charge transfer and other optoelectronic properties Lewis acid adducts remains elusive. This challenge must be addressed through complementary methods combining experimental with computational insights from first principles. Ab initio calculations for can computationally expensive less straightforward than those sufficient simple ground-state properties, especially large conjugated molecules acids. In this contribution, we show that machine...

This study investigates electron transport and distribution of an organometallic dimer‐based dopant (RuCp*Mes)2 in benchmarked P(NDI2OD‐T2) films, which is not affected by deep traps originating from atmospheric contaminants. The mobility can be enhanced >10‚ diodes with reduced thermal activation energy using dopants, rationalized the filling up tail electronic states doping induced carriers. n‐doping also improve injection at Schottky contacts nanoscale measurements confirmed conducting...

High-performance solution-processed ionic-organic ratchets are fabricated using polymer semiconductors. The devices can provide both high short-circuit current and open-circuit voltage at room temperature, be driven by AC signals with frequencies up to 13.56 MHz. effects of trap density, mobility, rectification ratio in the device on investigated clarified.

Investigation of Lewis acid-base interactions has been conducted by ab initio calculations and Machine Learning (ML) models. This study aims to resolve two critical tasks that have not quantitatively investigated. First, ML models developed from Density Functional Theory (DFT) predict experimental BF3 affinity with Pearson correlation coefficients around 0.9 mean absolute errors 10 kJ mol-1. The are trained DFT-calculated more than 3000 adducts, input features readily obtained rdkit. Second,...

Two narrow-bandgap conjugated polyelectrolytes (CPEs) of identical backbone structure but different pendant charges are used to disperse single-walled carbon nanotubes (SWNTs) in MeOH. Films the resulting CPE:SWNT composites have electrical conductivity dependent on SWNT loading, which can be increased with acid vapor treatment. The anionic CPE gives higher for composite immediately after deposition, whereas a more-significant increase is observed cationic counterpart

Yon Visell and co-workers describe miniature soft electromagnetic actuators for applications in robotics. The devices, presented article number 1800244, are based on fine helical inductors fabricated from silicone polymer colloids, eutectic Gallium Indium alloy, magnetic (NdFeB) powder. Intrinsically deformable demonstrated high frequency motion control, including a tactile display robotic gripper.