國立虎尾科技大學 |

Solution-Processing of Organic Semiconductors for Field-Effect Transistors.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Solution-Processing of Organic Semiconductors for Field-Effect Transistors./
Author:	Jo, Pil Sung.
Description:	1 online resource (120 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 82-09, Section: B.
Contained By:	Dissertations Abstracts International82-09B.
Subject:	Applied physics. -
Online resource:	click for full text (PQDT)
ISBN:	9798698537335

Solution-Processing of Organic Semiconductors for Field-Effect Transistors.
Jo, Pil Sung.

Solution-Processing of Organic Semiconductors for Field-Effect Transistors. - 1 online resource (120 pages)

Source: Dissertations Abstracts International, Volume: 82-09, Section: B.

Thesis (Ph.D.)--Stanford University, 2014.

Includes bibliographical references

Solution-processability is a key advantage of organic semiconductors, enabling us to easily deposit these materials at low-cost. Among organic semiconductors, small molecule semiconductors are typically highly crystalline and thus exhibit high carrier mobilities; however, small molecules are generally difficult to deposit into uniform films by solution-processing. In this thesis, we focus on developing solution-processing methods for semiconducting small molecules and understanding the mechanism behind film formation / charge transport in these systems for applications in organic field-effect transistors (OFETs).First, a modified capillary force lithography (MCFL) technique is introduced for fabricating highly textured micro-patterns of a crystalline semiconducting small molecule, C8-BTBT. As this technique is based on soft lithography, various geometries can be patterned onto substrates of interest and the size of the patterns is also easily controlled. Detailed characterizations reveal that the walls of the PDMS stamp used for patterning play an important role in controlling nucleation and growth of C8-BTBT crystals. Fabricated micro-line patterns for high-performance active layers in OFETs are shown to exhibit field-effect mobilities as high as 2.6 cm2/Vs.Secondly, blending semiconducting small molecules with polymer binders is investigated for simultaneously utilizing the exceptional electronic property of small molecules and the good film-forming property of polymers. Our results reveal that residual solvent in blend films following spin-coating plays a critical role in inducing vertical phase separation. In addition, we deduce specific characteristics of polymer binder that are required to generate vertical phase separation and show how annealing temperature affects the type of crystalline phase of rubrene formed in blend films.Lastly, solvent effects are also investigated on the properties of rubrene small molecule blended with a polymer binder. The properties of blend films are analyzed in terms of morphology, crystallinity, and charge transport with various characterization techniques. From our results, we found that there exists a strong correlation between the properties of blend films and solvent characteristics such as solubility, boiling temperature, and surface tension.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798698537335Subjects--Topical Terms:

1181953
Applied physics.
Subjects--Index Terms:

Solution-processing methodsIndex Terms--Genre/Form:

554714
Electronic books.

Solution-Processing of Organic Semiconductors for Field-Effect Transistors.
LDR:03722ntm a22003737 4500 001 1147794
005 20240916075401.5
006 m o d
007 cr bn ---uuuuu
008 250605s2014 xx obm 000 0 eng d
020 $a 9798698537335
035 $a (MiAaPQ)AAI28121326
035 $a (MiAaPQ)STANFORDfg355wp6829
035 $a AAI28121326
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Jo, Pil Sung. $3 1473612
245 1 0 $a Solution-Processing of Organic Semiconductors for Field-Effect Transistors.
264 0 $c 2014
300 $a 1 online resource (120 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertations Abstracts International, Volume: 82-09, Section: B.
500 $a Advisor: Salleo, Alberto;Bao, Zhenan;McIntyre, Paul Cameron.
502 $a Thesis (Ph.D.)--Stanford University, 2014.
504 $a Includes bibliographical references
520 $a Solution-processability is a key advantage of organic semiconductors, enabling us to easily deposit these materials at low-cost. Among organic semiconductors, small molecule semiconductors are typically highly crystalline and thus exhibit high carrier mobilities; however, small molecules are generally difficult to deposit into uniform films by solution-processing. In this thesis, we focus on developing solution-processing methods for semiconducting small molecules and understanding the mechanism behind film formation / charge transport in these systems for applications in organic field-effect transistors (OFETs).First, a modified capillary force lithography (MCFL) technique is introduced for fabricating highly textured micro-patterns of a crystalline semiconducting small molecule, C8-BTBT. As this technique is based on soft lithography, various geometries can be patterned onto substrates of interest and the size of the patterns is also easily controlled. Detailed characterizations reveal that the walls of the PDMS stamp used for patterning play an important role in controlling nucleation and growth of C8-BTBT crystals. Fabricated micro-line patterns for high-performance active layers in OFETs are shown to exhibit field-effect mobilities as high as 2.6 cm2/Vs.Secondly, blending semiconducting small molecules with polymer binders is investigated for simultaneously utilizing the exceptional electronic property of small molecules and the good film-forming property of polymers. Our results reveal that residual solvent in blend films following spin-coating plays a critical role in inducing vertical phase separation. In addition, we deduce specific characteristics of polymer binder that are required to generate vertical phase separation and show how annealing temperature affects the type of crystalline phase of rubrene formed in blend films.Lastly, solvent effects are also investigated on the properties of rubrene small molecule blended with a polymer binder. The properties of blend films are analyzed in terms of morphology, crystallinity, and charge transport with various characterization techniques. From our results, we found that there exists a strong correlation between the properties of blend films and solvent characteristics such as solubility, boiling temperature, and surface tension.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Applied physics. $3 1181953
650 4 $a Materials science. $3 557839
653 $a Solution-processing methods
653 $a Organic field-effect transistors
653 $a Field-effect mobilities
655 7 $a Electronic books. $2 local $3 554714
690 $a 0794
690 $a 0215
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Stanford University. $3 1184533
773 0 $t Dissertations Abstracts International $g 82-09B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28121326 $z click for full text (PQDT)