Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest–Host Systems

Anna K. Hailey; Anthony J. Petty; Jennifer Washbourne; Karl J. Thorley; Sean R. Parkin; John E. Anthony; Yueh Lin Loo

doi:10.1002/adma.201700048

Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest–Host Systems

Anna K. Hailey, Anthony J. Petty, Jennifer Washbourne, Karl J. Thorley, Sean R. Parkin, John E. Anthony, Yueh Lin Loo

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

In order to understand how additives influence the structure and electrical properties of active layers in thin-film devices, a compositionally identical but structurally different guest–host system based on the syn and anti isomers of triethylsilylethynyl anthradithiophene (TES ADT) is systematically explored. The mobility of organic thin-film transistors (OTFTs) comprising anti TES ADT drops with the addition of only 0.01% of the syn isomer and is pinned at the mobility of OTFTs having pure syn isomer after the addition of only 10% of the isomer. As the syn isomer fraction increases, intermolecular repulsion increases, resulting in a decrease in the unit-cell density and concomitant disordering of the charge-transport pathway. This molecular disorder leads to an increase in charge trapping, causing the mobility of OTFTs to drop with increasing syn-isomer concentration. Since charge transport is sensitive to even minute fractions of molecular disorder, this work emphasizes the importance of prioritizing structural compatibility when choosing material pairs for guest–host systems.

Original language	English
Article number	1700048
Journal	Advanced Materials
Volume	29
Issue number	23
DOIs	https://doi.org/10.1002/adma.201700048
State	Published - Jun 20 2017

Bibliographical note

Publisher Copyright:
© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Funding

Y.-L.L. acknowledges the National Science Foundation (NSF) MRSEC program through the Princeton Center for Complex Materials (DMR-1420541) and the Designing Materials to Revolutionize and Engineer our Future (DMREF) program through DMR-1627453. J.E.A. acknowledges the DMREF program through DMR-1627428. Part of this research was conducted at the Cornell High Energy Synchrotron Source, which was supported by the NSF and the National Institutes of Health/National Institute of General Medical Sciences (DMR-1332208). A.K.H. was supported by a NSF Graduate Research Fellowship.

Funders	Funder number
National Science Foundation (NSF)	1627428
National Institutes of Health (NIH)
National Institute of General Medical Sciences	DMR-1332208
Princeton Center for Complex Materials	DMR-1627428, DMR-1420541, DMR-1627453

Keywords

disorder
guest–host systems
isomers
organic semiconductors
organic thin-film transistors

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1002/adma.201700048

Cite this

@article{c24753c104b3489aa77c0bf2b7cfa946,

title = "Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest–Host Systems",

abstract = "In order to understand how additives influence the structure and electrical properties of active layers in thin-film devices, a compositionally identical but structurally different guest–host system based on the syn and anti isomers of triethylsilylethynyl anthradithiophene (TES ADT) is systematically explored. The mobility of organic thin-film transistors (OTFTs) comprising anti TES ADT drops with the addition of only 0.01\% of the syn isomer and is pinned at the mobility of OTFTs having pure syn isomer after the addition of only 10\% of the isomer. As the syn isomer fraction increases, intermolecular repulsion increases, resulting in a decrease in the unit-cell density and concomitant disordering of the charge-transport pathway. This molecular disorder leads to an increase in charge trapping, causing the mobility of OTFTs to drop with increasing syn-isomer concentration. Since charge transport is sensitive to even minute fractions of molecular disorder, this work emphasizes the importance of prioritizing structural compatibility when choosing material pairs for guest–host systems.",

keywords = "disorder, guest–host systems, isomers, organic semiconductors, organic thin-film transistors",

author = "Hailey, \{Anna K.\} and Petty, \{Anthony J.\} and Jennifer Washbourne and Thorley, \{Karl J.\} and Parkin, \{Sean R.\} and Anthony, \{John E.\} and Loo, \{Yueh Lin\}",

note = "Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2017",

month = jun,

day = "20",

doi = "10.1002/adma.201700048",

language = "English",

volume = "29",

number = "23",

}

TY - JOUR

T1 - Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest–Host Systems

AU - Hailey, Anna K.

AU - Petty, Anthony J.

AU - Washbourne, Jennifer

AU - Thorley, Karl J.

AU - Parkin, Sean R.

AU - Anthony, John E.

AU - Loo, Yueh Lin

PY - 2017/6/20

Y1 - 2017/6/20

N2 - In order to understand how additives influence the structure and electrical properties of active layers in thin-film devices, a compositionally identical but structurally different guest–host system based on the syn and anti isomers of triethylsilylethynyl anthradithiophene (TES ADT) is systematically explored. The mobility of organic thin-film transistors (OTFTs) comprising anti TES ADT drops with the addition of only 0.01% of the syn isomer and is pinned at the mobility of OTFTs having pure syn isomer after the addition of only 10% of the isomer. As the syn isomer fraction increases, intermolecular repulsion increases, resulting in a decrease in the unit-cell density and concomitant disordering of the charge-transport pathway. This molecular disorder leads to an increase in charge trapping, causing the mobility of OTFTs to drop with increasing syn-isomer concentration. Since charge transport is sensitive to even minute fractions of molecular disorder, this work emphasizes the importance of prioritizing structural compatibility when choosing material pairs for guest–host systems.

AB - In order to understand how additives influence the structure and electrical properties of active layers in thin-film devices, a compositionally identical but structurally different guest–host system based on the syn and anti isomers of triethylsilylethynyl anthradithiophene (TES ADT) is systematically explored. The mobility of organic thin-film transistors (OTFTs) comprising anti TES ADT drops with the addition of only 0.01% of the syn isomer and is pinned at the mobility of OTFTs having pure syn isomer after the addition of only 10% of the isomer. As the syn isomer fraction increases, intermolecular repulsion increases, resulting in a decrease in the unit-cell density and concomitant disordering of the charge-transport pathway. This molecular disorder leads to an increase in charge trapping, causing the mobility of OTFTs to drop with increasing syn-isomer concentration. Since charge transport is sensitive to even minute fractions of molecular disorder, this work emphasizes the importance of prioritizing structural compatibility when choosing material pairs for guest–host systems.

KW - disorder

KW - guest–host systems

KW - isomers

KW - organic semiconductors

KW - organic thin-film transistors

UR - https://www.scopus.com/pages/publications/85017430411

UR - https://www.scopus.com/inward/citedby.url?scp=85017430411&partnerID=8YFLogxK

U2 - 10.1002/adma.201700048

DO - 10.1002/adma.201700048

M3 - Article

C2 - 28401696

AN - SCOPUS:85017430411

SN - 0935-9648

VL - 29

JO - Advanced Materials

JF - Advanced Materials

IS - 23

M1 - 1700048

ER -

Understanding the Crystal Packing and Organic Thin-Film Transistor Performance in Isomeric Guest–Host Systems

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this