Very High Mobility in Solution-Processed Organic Thin-Film Transistors of Highly Ordered [1]Benzothieno[3,2-b]benzothiophene Derivatives

Uemura, Tomomasa; Hirose, Yasuyuki; Uno, Mayumi; Takimiya, Kazuo; Takeya, Jun

doi:10.1143/apex.2.111501

Cited by 262 publications

(207 citation statements)

References 19 publications

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“…To promote the growth of organic films with a well-defined crystalline orientation, various approaches have been suggested in the literature, including a liquid-sustaining blade held or moved along the Si/SiO 2 wafer 16 , or drop casting a semiconductor solution on an inclined Si/SiO 2 wafer 17 . These methods provide a driving force for oriented film growth.…”

Section: Resultsmentioning

confidence: 99%

Ultra-flexible solution-processed organic field-effect transistors

et al. 2012

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Organic semiconductors might enable new applications in low-cost, light-weight, flexible electronics. To build a solid foundation for these technologies, more fundamental studies of electro-mechanical properties of various types of organic semiconductors are necessary. Here we perform basic studies of charge transport in highly crystalline solution-processed organic semiconductors as a function of applied mechanical strain. As a test bed, we use small molecules crystallized on thin plastic sheets, resulting in high-performance flexible field-effect transistors. These devices can be bent multiple times without degradation to a radius as small as B200 mm, demonstrating that crystalline solution-processed organic semiconductors are intrinsically highly flexible. This study of electro-mechanical properties suggests that solution-processable organic semiconductors are suitable for applications in flexible electronics, provided that integration with other important technological advances, such as device scalability and low-voltage operation, is achieved in the future.

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Section: Resultsmentioning

confidence: 99%

Ultra-flexible solution-processed organic field-effect transistors

et al. 2012

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“…Their solutionprocessed films showed average mobility values as high as 0.1 cm 2 V À 1 s À 1 for samples prepared by simple spin-coating 13 , 0.9 cm 2 V À 1 s À 1 when using a method based on the modified capillary force lithography 14 and 25 cm 2 V À 1 s À 1 when a novel off-centre spin-coating method is employed 15 . On the other hand, inkjet printing single crystals yielded TFTs for which average mobilities of 16.4 cm 2 V À 1 s À 1 were reported 16 , whereas 5 cm 2 V À 1 s À 1 was measured on devices prepared by drop casting on inclined substrates 17 . These values testify that BTBT is among the best performing p-type materials for TFTs, thus competing with their amorphous silicon-based counterparts.…”

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confidence: 99%

Optically switchable transistors by simple incorporation of photochromic systems into small-molecule semiconducting matrices

et al. 2015

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The fabrication of multifunctional high-performance organic thin-film transistors as key elements in future logic circuits is a major research challenge. Here we demonstrate that a photoresponsive bi-functional field-effect transistor with carrier mobilities exceeding 0.2 cm 2 V À 1 s À 1 can be developed by incorporating photochromic molecules into an organic semiconductor matrix via a single-step solution processing deposition of a two components blend. Tuning the interactions between the photochromic diarylethene system and the organic semiconductor is achieved via ad-hoc side functionalization of the diarylethene. Thereby, a large-scale phase-segregation can be avoided and superior miscibility is provided, while retaining optimal p-p stacking to warrant efficient charge transport and to attenuate the effect of photoinduced switching on the extent of current modulation. This leads to enhanced electrical performance of transistors incorporating small conjugated molecules as compared with polymeric semiconductors. These findings are of interest for the development of high-performing optically gated electronic devices.

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“…To address the above challenges, various groups have developed methods to pattern OSCs (3,9,(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24), such as templating OSCs (14,(19)(20)(21), inkjet printing (9,18), gravure printing, and other roll-to-roll coating methods (25)(26)(27). In addition, the use of solvent wetting/dewetting surface treatments has been widely used in conjunction with the patterning methods described above (10, 11, 13, 15-17, 22, 28, 29).…”

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confidence: 99%

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

Park

Giri

Shaw

et al. 2015

Proc. Natl. Acad. Sci. U.S.A.

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The electronic properties of solution-processable small-molecule organic semiconductors (OSCs) have rapidly improved in recent years, rendering them highly promising for various low-cost largearea electronic applications. However, practical applications of organic electronics require patterned and precisely registered OSC films within the transistor channel region with uniform electrical properties over a large area, a task that remains a significant challenge. Here, we present a technique termed "controlled OSC nucleation and extension for circuits" (CONNECT), which uses differential surface energy and solution shearing to simultaneously generate patterned and precisely registered OSC thin films within the channel region and with aligned crystalline domains, resulting in low device-to-device variability. We have fabricated transistor density as high as 840 dpi, with a yield of 99%. We have successfully built various logic gates and a 2-bit halfadder circuit, demonstrating the practical applicability of our technique for large-scale circuit fabrication.organic semiconductors | patterning | small molecules | transistors | circuits

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Very High Mobility in Solution-Processed Organic Thin-Film Transistors of Highly Ordered [1]Benzothieno[3,2-b]benzothiophene Derivatives

Cited by 262 publications

References 19 publications

Ultra-flexible solution-processed organic field-effect transistors

Ultra-flexible solution-processed organic field-effect transistors

Optically switchable transistors by simple incorporation of photochromic systems into small-molecule semiconducting matrices

Large-area formation of self-aligned crystalline domains of organic semiconductors on transistor channels using CONNECT

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