A Pseudo‐Regular Alternating Conjugated Copolymer Using an Asymmetric Monomer: A High‐Mobility Organic Transistor in Nonchlorinated Solvents

Choi, Hyun Ho; Baek, Jang Yeol; Song, Eunjoo; Kang, Boseok; Cho, Kilwon; Kwon, Soon‐Ki; Kim, Yun‐Hi

doi:10.1002/adma.201500335

Cited by 89 publications

(52 citation statements)

References 35 publications

(44 reference statements)

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“…[33][34][35][36][37][38][39][40][41][42][43][44][45] Of those, few were focused on improving the solubility of conjugated polymers via molecular design. 34,35,39,40,43,45 In general, three ways can be employed to increase the solubility of conjugated polymers. Foremost, the introduction of bulky side chains to the conjugated backbone can decrease the interaction between the macromolecules or increase the interaction between the polymer and the solvent, and then enhance solubility of the polymer.…”

Section: Introductionmentioning

confidence: 99%

“…47 Thirdly, the strong aggregation tendency of conjugated polymers could be suppressed by reducing regioregularity, resulting in an increase of solubility. 35,40,43,45 For example, Zhu etc. have shown that decreasing regioregularity, to some extent, may render polythiophene derivatives good solubility in o-xylene without deteriorating their organic field-effect transistor (OFET) performance.…”

Section: Introductionmentioning

confidence: 99%

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Isoindigo-based low bandgap conjugated polymer for o-xylene processed efficient polymer solar cells with thick active layers

et al. 2015

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A low bandgap conjugated polymer, i.e., poly[2,2'-bithiophene-alt-7-fluoro-N,N'-bis(2-octyldodecyl)isoindigo] (P(1FIID-BT)), was synthesized. The polymer was soluble in non-chlorinated solvents such as o-xylene and mesitylene, and exhibited a film optical bandgap of 1.61 eV as calculated from absorption onset and a deep highest occupied molecular orbital (HOMO) energy level of -5.46 eV as measured by electrochemical method. Remarkably high mobilities of 0.33 and 0.42 cm 2 V -1 s -1 were obtained for organic field-effect transistors (OFETs) based on pristine and annealed films, respectively. Inverted polymer solar cells (PSCs) were fabricated with phenyl-C 61 -butyric acid methyl ester (PC 61 BM) as acceptor material and oxylene as processing solvent. The device efficiency was insensitive to the thickness of active layer, and all devices with film thickness in the range of 105-340 nm showed power conversion efficiency (PCE) higher than 6.5%. The devices based on 270 nm thick film displayed the highest performance with a V OC of 0.89 V, a J SC of 14.50 mA/cm 2 and a FF of 0.58, leading to a PCE of 7.46%. This is the first low bandgap conjugated polymer for PSCs which combine three features: non-chlorinated solvent processible, high efficiency and insensitivity of efficiency to active layer thickness. Recently, our group reported dithienocarbazole (DTC) and isoindigo (IID) based D-A low band gap conjugated polymers

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Isoindigo-based low bandgap conjugated polymer for o-xylene processed efficient polymer solar cells with thick active layers

et al. 2015

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“…[3] While many conjugated polymers have shown high hole/electron mobility, [4] the study of conjugated polymers with ambipolar charget ransport has been lagged behind. The polymers exhibit extra-low band gap with energy levels closet oÀ4.0 eV and À5.0 eV due to the strong electron-donating and withdrawing ability of porphyrin and diketopyrrolopyrrole.…”

mentioning

confidence: 99%

“…[3] While many conjugated polymers have shown high hole/electron mobility, [4] the study of conjugated polymers with ambipolar charget ransport has been lagged behind. [1] Solution-processed conjugated polymers with high molecular weight and viscosity are able to apply into roll to roll printing technique, providing the advantage to realize large-area flexible OFET devices.…”

mentioning

confidence: 99%

“…[1] Solution-processed conjugated polymers with high molecular weight and viscosity are able to apply into roll to roll printing technique, providing the advantage to realize large-area flexible OFET devices. [3] While many conjugated polymers have shown high hole/electron mobility, [4] the study of conjugated polymers with ambipolar charget ransport has been lagged behind. [3] While many conjugated polymers have shown high hole/electron mobility, [4] the study of conjugated polymers with ambipolar charget ransport has been lagged behind.…”

mentioning

confidence: 99%

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Diketopyrrolopyrrole‐Porphyrin Based Conjugated Polymers for Ambipolar Field‐Effect Transistors

Zhou

Zhang

et al. 2017

Chemistry An Asian Journal

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Porphyrin-based molecules have been widely used in dye-sensitized solar cells and bulk heterojunction solar cells, but their application in field-effect transistors (FETs) is limited. In this work, two conjugated polymers based on diketopyrrolopyrrole and porphyrin units were developed for FETs. The polymers exhibit extra-low band gap with energy levels close to -4.0 eV and -5.0 eV due to the strong electron-donating and withdrawing ability of porphyrin and diketopyrrolopyrrole. With additionally high crystalline properties, ambipolar charge carrier transports with a hole mobility of 0.1 cm V s in FETs were realized in these polymers, representing the highest performance in solution-processed FETs based on porphyrin unit.

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Electrical Double‐Slope Nonideality in Organic Field‐Effect Transistors

Phan

Ford

Lill

et al. 2018

Adv Funct Materials

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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 in a variety of emerging applications. Examples include form‐fitting healthcare‐monitoring devices, flexible displays, and flexible radio frequency identification tags. Organic FETs (OFETs) are viable candidates for producing such flexible devices because they incorporate semiconducting π‐conjugated materials, including small molecules and conjugated polymers, which are intrinsically soft and mechanically compatible with flexible substrates. For OFETs to be industrially viable, however, they must achieve not only high charge carrier mobility, but also ideal and comprehensible electrical characteristics. Most recently, nonideal double‐slope characteristics in the transfer curves of OFETs (i.e., high slope at low gate voltage and low slope at high gate voltage), have stirred debate, which has led to different mechanistic rationales in the literature. This review focuses on the general observations, mechanistic understanding, and possible solutions associated with phenomena that result in FETs with double‐slope characteristics. By surveying and systematically summarizing in a single source relevant literature that deals with the issue of double slope, the experimental framework and theoretical basis for interpreting and avoiding this electrical nonideality in OFETs is provided.

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A Pseudo‐Regular Alternating Conjugated Copolymer Using an Asymmetric Monomer: A High‐Mobility Organic Transistor in Nonchlorinated Solvents

Cited by 89 publications

References 35 publications

Isoindigo-based low bandgap conjugated polymer for o-xylene processed efficient polymer solar cells with thick active layers

Isoindigo-based low bandgap conjugated polymer for o-xylene processed efficient polymer solar cells with thick active layers

Diketopyrrolopyrrole‐Porphyrin Based Conjugated Polymers for Ambipolar Field‐Effect Transistors

Electrical Double‐Slope Nonideality in Organic Field‐Effect Transistors

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