Recent advances in the development of n-type organic thermoelectric materials, n-dopants and new doping strategies are summarized current challenges future prospects discussed this research field.

Abstract Parallel‐type organic electrochemical transistors (p‐OECTs) with aqueous electrolyte gate dielectrics have been widely studied for transducing biological signals into electrical signals. However, liquid electrolyte‐based p‐OECTs suffer from poor device stability, low transconductance ( g m ), and limited applications. In this study, a quasi‐solid‐state ion gel‐gated vertical‐type OECT (v‐OECT) NOT logic are successfully demonstrated by combining both p‐type n‐type v‐OECTs the first...

Abstract Photomultiplication (PM)‐type organic photodetectors (OPDs), which typically form a homogeneous distribution (HD) of n ‐type dopants in p polymer host (HD PM‐type OPDs), have achieved breakthrough device responsivity by surpassing theoretical limit external quantum efficiency (EQE). However, they face limitations higher dark current and slower dynamic characteristics compared to p‐n heterojunction ( HJ) OPDs due inherent long lifetime trapped electrons. To overcome this, new OPD is...

Two types of p-type thermoelectric (TE) polymers with alkyl (PCPDTSBT) and oligoethylene glycol (OEG) side chains (PCPDTSBT-A) on an sp2-hybridized olefinic bis(alkylsulfanyl)methylene-substituted cyclopentadithiophene backbone are synthesized. Interestingly, the OEG-substituted polymer, PCPDTSBT-A, exhibits significant self-doping compared to PCPDTSBT, where polaron density former is 2.3 × 1016 mm–3 (vs 7.9 1014 for PCPDTSBT) without external doping. Changing also induces a completely...

Substituting the polar diethylene glycol side chain in non-fullerene acceptor (IDIC-DEG) caused vertical phase separation (VPS) due to surface energy differences with hydrophobic donor (PPDT2FBT), leading the...

A dual-band on-body antenna for a wireless body area network repeater system is proposed. The designed has the maximum radiation directed toward inside of human in medical implantable communication service (MICS) band order to collect vital information from and outside industrial, scientific, (ISM) transmit that monitoring system. In addition, return loss property insensitive effects by utilizing epsilon negative zeroth-order resonance property.

Abstract Three p‐type thermoelectric (TE) polymers based on the indacenodithiophene moiety substituted with bis(alkylsulfanyl)methylene side‐chains (IDTS) are synthesized. The TE characteristics of IDTS‐based donor–donor’ (D–D′) type PIDTSDTTT and donor–acceptor (D–A) polymers, PIDTSBT PIDTS2FBT investigated. Remarkably higher electrical conductivity (σ = ≈1000 S cm −1 ) power factor (PF ≈120 μW m K −2 by doping AuCl 3 measured for compared to D–A polymers. σ originates from its carrier...

Combining a planar electron-rich D–D′-type molecular design and optimal hybrid doping successfully demonstrates metal-like carrier transport whilst reducing the Seebeck coefficient–conductivity trade-off relation under degenerately doped conditions.

An implanted compact antenna for an artificial cardiac pacemaker is proposed. The dimension of the system, including element, 30mm × 35mm 7mm. When embedded in a semi-solid flat phantom with equivalent electrical properties as human body, S11 value -19.2dB at 403.5MHz and -10dB impedance bandwidth 10MHz (399∼409MHz). proposed has peak gain -24.61dBi 403.5MHz. measured specific absorption ratio (SAR) 0.0079W/Kg (1g tissue). Moreover, to estimate communication performance operated real...

We explore the application of a high conduction band polymer acceptor (IDSIC-BTI) as ternary component in indoor organic photovoltaic cells (IOPVs) and photodiodes (OPDs). IDSIC-BTI shows 1.91 eV electrochemical gap high-lying lowest unoccupied molecular orbital (LUMO) −3.78 eV. Its compatibility miscibility with nonfullerene acceptors (NFAs) stem from shared electron-deficient structural elements. Combining NFAs such IT-4F Y6 yields smooth surface morphologies elevates LUMO levels due to...

In this paper, an implantable planar inverted-F antenna (PIFA) for artificial cardiac pacemaker is proposed. The has a simple structure with low profile and placed on the top side of pacemaker. dimension system, including element, 42 mm × 43.6 11 mm. When embedded in pig tissue, -10 dB impedance bandwidth 6 MHz (399 ~ 406 MHz). proposed PIFA tissue peak gain -20.19 dBi radiation efficiency 1.12 % at 403 MHz. liquid flat phantom, its specific absorption ratio (SAR) value 0.038 W/Kg (1 g...

A flexible diversity antenna using zeroth-order resonance (ZOR) for WBAN applications is proposed to improve performance and overcome multipath fading. The dimension of the antenna, including system ground, two elements, decoupling network 44mm × 35mm 0.127mm. When located on a semi-solid flat phantom with equivalent electrical properties human body, S11 S22 values at 2.45GHz are -22.8dB -25.4dB, respectively. measured specific absorption ratio (SAR) elements #1 #2 0.54W/kg 0.75W/kg (1g...

Abstract In this article, a capsule antenna used in an ingestible medical device is proposed. To achieve miniaturization and wide bandwidth, inverted‐F with meandered strip line was used. The performance human voxel model analyzed through simulation, the of fabricated verified by comparing measured data that when placed human‐equivalent liquid phantom. investigate proposed indoor environment, typical sickroom set‐up, propagation characteristics between base station are at 1.4 GHz. © 2012...

In this paper, a planar inverted-F antenna with wideband characteristic is proposed for GSM850/DCS1800/DCS1900/EMT200/WLAN/DMB services at the same time. The composed of main patch pair slant slits and L-shaped has total volume 15 times 45 8 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . To achieve triple band operation, length width slit 1 on are optimized. increase impedance bandwidth an antenna, two patch, which excited by...

Thermoelectric (TE) performance of a specific semicrystalline polymer is studied experimentally only in limited range doping levels with molecular methods. The level finely controlled via situ electrochemical wide carrier concentrations an electrolyte ([PMIM]+ [TFSI]- )-gated organic transistor system. Then, the charge generation/transport and TE properties four p-type polymers are analyzed their dynamic changes crystalline morphologies local density states (DOS) during compared. These...

This research presents a novel methodology for measuring the complex permittivity of material under test (MUT) in millimeter-wave (mmWave) band by using two rectangular waveguide adapters. Contrary to conventional Nicolson-Ross-Weir (NRW) method, proposed measurement method does not require fabrication process exact MUT insertion into waveguide. In our measurement, simple commercial adapters are employed instead large flange structures. The non-destructive is achieved combining NRW Gaussian...

In this paper, an antenna used in ingestible capsule endoscope system is proposed. To achieve miniaturization and a wide bandwidth, inverted-F with meandered strip line was used. The performance human voxel model analyzed through simulation. order to investigate the of proposed indoor environment, typical sickroom setup, propagation characteristics between base station are at 1.4 GHz. fabricated verified by comparing measured data that simulation when placed human-equivalent liquid phantom.

The electromagnetic characteristics of FCEVs(fuel cell electric vehicles) are much different from the existing combustion engine cars as well hybrid, plug-in-hybrid, and pure vehicles due to high voltage/current generated by a fuel stack which uses compressed hydrogen gas reacted with oxygen. To operate efficiently, BOP(Balance Plant) is essential. BOP systems used many not only for motors in water pump, air blower, recycling pump but also inverters these motors. Since or components...

A Compact antenna with a band-stop characteristic for ultra-wideband application is proposed. To increase the impedance bandwidth of proposed antenna, tapered ground and circular slot are used. By attaching an inverted Y-shaped open-circuited stub in ring, obtained. The designed satisfles voltage standing wave ratio requirement less than 2.0 frequency between 3.12GHz 10.73GHz while showing band stop performance 5.15GHz to 5.78GHz. This shows omnidirectional radiation pattern similar that...

Front Cover In article number 2201145, Woo, Lee, and co-workers investigate in-situ charge generation, transport, thermoelectric properties of side-chain engineered semicrystalline polymers by electrochemical doping, which was implemented an ionic liquid electrolyte-gated organic transistor system. The detailed characteristics during doping are monitored with the morphological changes, variation localized density states, transition from p- to n-doped states.