Low-voltage polymer/small-molecule blend organic thin-film transistors and circuits fabricated via spray deposition

Hunter, Simon; Ward, Jeremy W.; Payne, Marcia M.; Anthony, John E.; Jurchescu, Oana D.; Anthopoulos, Thomas D.

doi:10.1063/1.4922194

Cited by 35 publications

(25 citation statements)

References 29 publications

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“…Indeed, the impact of fabrication techniques on the versatile blend system has been demonstrated a number of times over the years. Examples of fabrication techniques include spray deposition, line printing, air brushing, inkjet printing, dipping processes, vertical flow, blade coating, and off‐center spin coating …”

Section: Molecular Semiconductor/polymer Blendscontrasting

confidence: 55%

Recent Progress in High‐Mobility Organic Transistors: A Reality Check

et al. 2018

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Over the past three decades, significant research efforts have focused on improving the charge carrier mobility of organic thin-film transistors (OTFTs). In recent years, a commonly observed nonlinearity in OTFT current-voltage characteristics, known as the "kink" or "double slope," has led to widespread mobility overestimations, contaminating the relevant literature. Here, published data from the past 30 years is reviewed to uncover the extent of the field-effect mobility hype and identify the progress that has actually been achieved in the field of OTFTs. Present carrier-mobility-related challenges are identified, finding that reliable hole and electron mobility values of 20 and 10 cm V s , respectively, have yet to be achieved. Based on the analysis, the literature is then reviewed to summarize the concepts behind the success of high-performance p-type polymers, along with the latest understanding of the design criteria that will enable further mobility enhancement in n-type polymers and small molecules, and the reasons why high carrier mobility values have been consistently produced from small molecule/polymer blend semiconductors. Overall, this review brings together important information that aids reliable OTFT data analysis, while providing guidelines for the development of next-generation organic semiconductors.

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Section: Molecular Semiconductor/polymer Blendscontrasting

confidence: 55%

Recent Progress in High‐Mobility Organic Transistors: A Reality Check

et al. 2018

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“…These fascinating features of OFETs make them perfect candidates for applications as sensors [5], radio frequency identification (RFID) tags [6], smart memories [7], point-of-care diagnostic systems [8], flexible display backplanes [9] and wearable systems [10]. In the past few decades, apart from developing high mobility organic semiconductors [11], significant efforts focused on developing low-cost solution-based processes for OFETs [12]- [14], with ink-jet printing as one of the most promising candidates. Its merits include drop-on-demand direct patterning, non-contact mode, material saving and good compatibility with large area flexible substrates [15], all of which are highly desirable for low-cost and high-throughput electronics [16]- [19].…”

Section: Introductionmentioning

confidence: 99%

All ink-jet printed low-voltage organic field-effect transistors on flexible substrate

Feng

Jiang

et al. 2016

Organic Electronics

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In this work, all ink-jet printed (IJP) low-voltage organic field-effect transistors (OFETs) on flexible substrate are reported. The OFETs use IJP silver (Ag) for source/drain/gate electrodes, poly(4-vinylphenol) (PVP) for gate dielectric, 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) blended with polystyrene (PS) as the semiconducting layer and CYTOP for encapsulation layer. All the printing processes were carried out in ambient air environment using a single laboratory ink-jet printer Dimatix DMP-2831. The all IJP device presents state-of-the-art performance with low operation voltage down to 3 V, small subthreshold swing (SS) of 0.155 V/decade, mobility of 0.26 cm 2 V-1 s-1 , threshold voltage (V th) of-0.17 V and on/off ratio of 3.1×10 5 , along with a yield of 62.5%. Through interface engineering and proper process optimization, this work demonstrates a promising low-voltage all IJP device platform for low-cost flexible printed electronics. Keywords Organic field effect transistors (OFETs); all ink-jet printed TFTs; low-voltage operation §: Linrun Feng and Chen Jiang contributed equally to this work.

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“…Spray printing13141516 of semiconductor inks is recognized as one of the best methods for achieving efficient deposition of molecular semiconductors compatible with large-area printed electronics production lines. Vertically injected spray mists have been used in the past, relying mostly on the slow evaporation rates of certain solvents to prolong the fluid to solid transition and thus improve the crystallization of the dissolved semiconducting molecules15.…”

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confidence: 99%

Spray printing of organic semiconducting single crystals

et al. 2016

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Single-crystal semiconductors have been at the forefront of scientific interest for more than 70 years, serving as the backbone of electronic devices. Inorganic single crystals are typically grown from a melt using time-consuming and energy-intensive processes. Organic semiconductor single crystals, however, can be grown using solution-based methods at room temperature in air, opening up the possibility of large-scale production of inexpensive electronics targeting applications ranging from field-effect transistors and light-emitting diodes to medical X-ray detectors. Here we demonstrate a low-cost, scalable spray-printing process to fabricate high-quality organic single crystals, based on various semiconducting small molecules on virtually any substrate by combining the advantages of antisolvent crystallization and solution shearing. The crystals' size, shape and orientation are controlled by the sheer force generated by the spray droplets' impact onto the antisolvent's surface. This method demonstrates the feasibility of a spray-on single-crystal organic electronics.

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Low-voltage polymer/small-molecule blend organic thin-film transistors and circuits fabricated via spray deposition

Cited by 35 publications

References 29 publications

Recent Progress in High‐Mobility Organic Transistors: A Reality Check

Recent Progress in High‐Mobility Organic Transistors: A Reality Check

All ink-jet printed low-voltage organic field-effect transistors on flexible substrate

Spray printing of organic semiconducting single crystals

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