Uniformity of fully gravure printed organic field-effect transistors

Hambsch, Mike; Reuter, K.; Stanel, Michael; Schmidt, G.; Kempa, H.; Fügmann, Uta; Hahn, Ulrich; Hübler, Arved C.

doi:10.1016/j.mseb.2010.02.035

Cited by 109 publications

(76 citation statements)

References 35 publications

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“…OTFT yield is sparsely mentioned in literature, but a few examples are available for comparison. Hambsch et al (27) have shown that gravure printing of polymers can yield 75% working OTFTs. Recently, Arias and coworkers (48) have shown fully solution-deposited OTFTs with a yield of 96%.…”

Section: Resultsmentioning

confidence: 99%

“…Inkjet printing (59)(60)(61)(62)(63) and roll-to-roll printing (27,(64)(65)(66) are the two most commonly used methods to fabricate organic circuits and have the greatest potential for enabling large-area, low-cost organic electronics. These techniques, however, suffer from registration inaccuracies requiring large features and specially designed layouts and processes (27,64,66). The minimum feature sizes also vary widely, typically in the tens of micrometers range or higher (27,67).…”

Section: Discussionmentioning

confidence: 99%

“…These techniques, however, suffer from registration inaccuracies requiring large features and specially designed layouts and processes (27,64,66). The minimum feature sizes also vary widely, typically in the tens of micrometers range or higher (27,67). These restrictions set a limit on the size and density of TFTs that can be achieved.…”

Section: Discussionmentioning

confidence: 99%

“…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).…”

mentioning

confidence: 99%

“…For instance, alignment using inkjet printing is restricted by the registration capability of the instrument, whereas the size of each OTFT is limited by the droplet size attainable (22,31). Another potential issue with these methods is the variance in electrical characteristics of TFTs due to the difficulty in obtaining uniform crystal growth on isolated TFTs over large areas (9,15,21,27,28,(31)(32)(33)(34)(35). Even single crystalline domains of patterned TFTs may have large variability in electrical characteristics as a result of random orientation and size variance.…”

mentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%