Microscopic observation of efficient charge transport processes across domain boundaries in donor-acceptor-type conjugated polymers

Tanaka, Hisaaki; Wakamatsu, Ayato; Kondo, Masahiro; Kawamura, Syosuke; Kuroda, Shin–ichi; Shimoi, Yukihiro; Park, Won-Tae; Noh, Yong‐Young; Takenobu, Taishi

doi:10.1038/s42005-019-0196-7

Cited by 27 publications

(32 citation statements)

References 66 publications

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“…S5. The planar molecules enable highly efficient interdomain connection (40)(41)(42)(43)(44), which may explain the metallic transition observed in the present study. However, the domain connection by tie molecules should be quite sensitive to the doping condition, presumably due to the structural/energetic disorder of the isolated tie molecules induced by the dopant.…”

supporting

confidence: 57%

Thermoelectric properties of a semicrystalline polymer doped beyond the insulator-to-metal transition by electrolyte gating

et al. 2020

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Conducting polymer thin films containing inherent structural disorder exhibit complicated electronic, transport, and thermoelectric properties. The unconventional power-law relation between the Seebeck coefficient (S) and the electrical conductivity (σ) is one of the typical consequences of this disorder, where no maximum of the thermoelectric power factor (P = S2σ) has been observed upon doping, unlike conventional systems. Here, it is demonstrated that a thiophene-based semicrystalline polymer exhibits a clear maximum of P through wide-range carrier doping by the electrolyte gating technique. The maximum value appears around the macroscopic insulator-to-metal transition upon doping, which is firmly confirmed by the temperature dependence of σ and magnetoresistance measurements. The effect of disorder on charge transport is suppressed in the metallic state, resulting in the conventional S-σ relation described by the Mott equation. The present results provide a physical background for controlling the performance of conducting polymers toward the application to thermoelectric devices.

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confidence: 57%

Thermoelectric properties of a semicrystalline polymer doped beyond the insulator-to-metal transition by electrolyte gating

et al. 2020

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“…An Arrhenius plot (Figure 3c) indicated that conductivity in the OSC is thermally activated and follows an Arrhenius relationship. Here, an E a of 82 ± 8 meV was calculated which is comparable to that calculated by Tanaka et al [32] from field-induced electron spin resonance (ESR) spectroscopy measurements, of 68 meV.…”

Section: Response To Analyte Vapourssupporting

confidence: 86%

Amine Detection Using Organic Field Effect Transistor Gas Sensors

Mougkogiannis

Turner

Persaud

2020

Sensors

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Low power gas sensors with high sensitivity and selectivity are desired for many practical applications. Devices based on organic field effect transistors are promising because they can be fabricated at modest cost and are low power devices. Organic field effect transistors fabricated in bottom-gate bottom-contact configuration using the organic semiconductor [2,5-(2-octyldodecyl)-3,6-diketopyrrolopyrrole-alt-5,5-(2,5-di(thien-2-yl)thieno] [3,2-b]thiophene) (DPP-T-TT) were systematically investigated to determine the response characteristics to a series of alkylamines and ammonia. The highest sensitivity was to dibutylamine with a limit of detection of 0.025 ppb, followed by n-butylamine, 0.056 ppb, and ammonia, 2.17 ppb. A model was constructed based on the Antoine equation that successfully allows the empirical prediction of the sensitivity and selectivity of the gas sensor to various analytes including amines and alcohols based on the Antoine C parameter and the heat of the vaporization of the analyte.

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“…[ 31a,60 ] In such cases, tie chains have the potential to reduce interaggregate transport barriers to intraaggregate limits. [ 61 ] Moreover, the mixed “face‐on” and “edge‐on” morphology is further expected to benefit transport in TGBC OFETs as well. [ 62 ]…”

Section: Resultsmentioning

confidence: 99%

Processable High Electron Mobility π‐Copolymers via Mesoscale Backbone Conformational Ordering

Eckstein

Melkonyan

Wang

et al. 2021

Adv Funct Materials

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The synthesis and experimental/theoretical characterization of a new series of electron‐transporting copolymers based on the naphthalene bis(4,8‐diamino‐1,5‐dicarboxyl)amide (NBA) building block are reported. Comonomers are designed to test the emergent effects of manipulating backbone torsional characteristics, and density functional theory (DFT) analysis reveals the key role of backbone conformation in optimizing electronic delocalization and transport. The NBA copolymer conformational and electronic properties are characterized using a broad array of molecular/macromolecular, thermal, optical, electrochemical, and charge transport techniques. All NBA copolymers exhibit strongly aggregated morphologies with significant nanoscale order. Copolymer charge transport properties are investigated in thin‐film transistors and exhibit excellent electron mobilities ranging from 0.4 to 4.5 cm2 V−1 s−1. Importantly, the electron transport efficiency correlates with the film mesoscale order, which emerges from comonomer‐dependent backbone planarity and extension. These results illuminate the key NBA building block structure–morphology–bulk property design relationships essential for processable, electronics‐applicable high‐performance polymeric semiconductors.

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Microscopic observation of efficient charge transport processes across domain boundaries in donor-acceptor-type conjugated polymers

Cited by 27 publications

References 66 publications

Thermoelectric properties of a semicrystalline polymer doped beyond the insulator-to-metal transition by electrolyte gating

Thermoelectric properties of a semicrystalline polymer doped beyond the insulator-to-metal transition by electrolyte gating

Amine Detection Using Organic Field Effect Transistor Gas Sensors

Processable High Electron Mobility π‐Copolymers via Mesoscale Backbone Conformational Ordering

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