Highly π‐Extended Copolymers with Diketopyrrolopyrrole Moieties for High‐Performance Field‐Effect Transistors

Chen, Huajie; Guo, Yunlong; Yu, Gui; Zhao, Yan; Zhang, Ji; Gao, Dong; Liu, Hongtao; Liu, Yunqi

doi:10.1002/adma.201201318

Cited by 739 publications

(738 citation statements)

References 32 publications

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“…1) as the active material gave OFET characteristics (Fig. 2b) that were an almost ideal fit to the gate voltage (or carrier density)-independent model 27 , in contrast to some other recently reported polymer OFETs that exhibited significant deviations from the ideal transistor equations 28 . Therefore, m can be unambiguously estimated by taking first and second derivatives of the drain current for linear and saturation regimes (Fig.…”

Section: Resultsmentioning

confidence: 52%

Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer

et al. 2013

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One of the most inspiring and puzzling developments in the organic electronics community in the last few years has been the emergence of solution-processable semiconducting polymers that lack significant long-range order but outperform the best, high-mobility, ordered semiconducting polymers to date. Here we provide new insights into the charge-transport mechanism in semiconducting polymers and offer new molecular design guidelines by examining a state-of-the-art indacenodithiophene-benzothiadiazole copolymer having field-effect mobility of up to 3.6 cm 2 V À 1 s À 1 with a combination of diffraction and polarizing spectroscopic techniques. Our results reveal that its conjugated planes exhibit a common, comprehensive orientation in both the non-crystalline regions and the ordered crystallites, which is likely to originate from its superior backbone rigidity. We argue that charge transport in high-mobility semiconducting polymers is quasi one-dimensional, that is, predominantly occurring along the backbone, and requires only occasional intermolecular hopping through short p-stacking bridges.

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Section: Resultsmentioning

confidence: 52%

Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer

et al. 2013

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“…Many high-mobility copolymers based on dithienyl-DPPs have been synthesized through coupling with intensely conjugated p-type moieties such as thieno [3,2-b]thiophene, unsubstituted dithiophene, diselenophene, benzothiadiazole, etc. (P12-P16) [11,37,[104][105][106]. The conjugated polymer with extremely high carrier mobilities so far has been synthesized by combining dithienyl-DPP and (E)-2-(2-(thiophen-2-yl)vinyl)thiophene moieties (P15b) [106] and [1,2-bis(5-(thiophen-2-yl)selenophen-2-yl]ethene (P16) [17], which are intense conjugated n-type [11] and p-type moieties [83,94], respectively.…”

Section: The Effect Of Planarity and Rigidity On Structure Morphologmentioning

confidence: 99%

Structure and Morphology Control in Thin Films of Conjugated Polymers for an Improved Charge Transport

Wang

et al. 2013

Polymers

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Abstract:The morphological and structural features of the conjugated polymer films play an important role in the charge transport and the final performance of organic optoelectronics devices [such as organic thin-film transistor (OTFT) and organic photovoltaic cell (OPV), etc.] in terms of crystallinity, packing of polymer chains and connection between crystal domains. This review will discuss how the conjugated polymer solidify into, for instance, thin-film structures, and how to control the molecular arrangement of such functional polymer architectures by controlling the polymer chain rigidity, polymer solution aggregation, suitable processing procedures, etc. These basic elements in intrinsic properties and processing strategy described here would be helpful to understand the correlation between morphology and charge transport properties and guide the preparation of efficient functional conjugated polymer films correspondingly.

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“…Especially, polymers have shown great advantages, due to their good film forming properties and mechanical flexibility applicable to bendable electronics [2]. Recently, field-effect transistor (FET) devices based on high-performance polymers have achieved charge-carrier mobilities higher than 1 cm 2 /Vs, already surpassing the benchmark performance of amorphous silicon [3,4]. In most of the cases, these organic semiconductors lead to a unipolar transport of the hole or electron as charge carriers in the transistor.…”

Section: Introductionmentioning

confidence: 99%

Solid-State Organization and Ambipolar Field-Effect Transistors of Benzothiadiazole-Cyclopentadithiophene Copolymer with Long Branched Alkyl Side Chains

et al. 2013

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Abstract:The solid-state organization of a benzothiadiazole-cyclopentadithiophene copolymer with long, branched decyl-tetradecyl side chains (CDT-BTZ-C14,10) is investigated. The C14,10 substituents are sterically demanding and increase the π-stacking distance to 0.40 nm from 0.37 nm for the same polymer with linear hexadecyls (C16). Despite the bulkiness, the C14,10 side chains tend to crystallize, leading to a small chain-to-chain distance between lamellae stacks and to a crystal-like microstructure in the thin film. Interestingly, field-effect transistors based on solution processed layers of CDT-BTZ-C14,10 show ambipolar behavior in contrast to CDT-BTZ-C16 with linear side chains, for which hole transport was previously observed. Due to the increased π-stacking distance, the mobilities are only 6 × 10

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Highly π‐Extended Copolymers with Diketopyrrolopyrrole Moieties for High‐Performance Field‐Effect Transistors

Cited by 739 publications

References 32 publications

Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer

Molecular origin of high field-effect mobility in an indacenodithiophene–benzothiadiazole copolymer

Structure and Morphology Control in Thin Films of Conjugated Polymers for an Improved Charge Transport

Solid-State Organization and Ambipolar Field-Effect Transistors of Benzothiadiazole-Cyclopentadithiophene Copolymer with Long Branched Alkyl Side Chains

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