Melt-processing of conjugated liquid crystals: A simple route to fabricate OFETs

Jonathan C. Maunoury; Jonathan R. Howse; Michael L. Turner

doi:10.1002/adma.200602859

Melt-processing of conjugated liquid crystals: A simple route to fabricate OFETs

Jonathan C. Maunoury, Jonathan R. Howse, Michael L. Turner

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

Abstract

A simple melt-processing of 5,5'-bis(4-hexylphenyl)-2,2'-bithiophene (DH-PTTP) was analyzed to induce homeotropic alignment of the molecules in the channel of an organic field-effect transistors (OFETs) and to control the thin film morphology. The thermal behavior of DH-PTTP was re-examined using differential scanning calorimetry (DSC) and polarized optical microscopy (POM), and the DSC trace showed three sharp transitions both on cooling and heating. POM observation revealed the appearance of a pronounced striation of the fan-shaped texture that transformed into a mosaic texture on further cooling. Polarized microscopy using OTS-treated glass slides revealed a pseudoisotropic texture on cooling from the isotropic to the SmA phase, consisting with a homeotropic alignment of the molecules in a single monodomain. This homeotropic alignment of liquid-crystalline organic semiconductors appears to be a promising route to control film morphology in the channel of OFETs.

Original language	English
Pages (from-to)	805-809
Number of pages	4
Journal	Advanced Materials
Volume	19
Issue number	6
DOIs	https://doi.org/10.1002/adma.200602859
Publication status	Published - 19 Mar 2007

Keywords

Cyclic voltammetry
Electric current-potential relationship
Field effect transistors
Hole mobility
Liquid crystals (melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)
Electric current carriers (mobility
melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)
hexylphenyl bithiophene liq crystal org field effect transistor

Access to Document

10.1002/adma.200602859

CCDC 600832: Experimental Crystal Structure Determination
Maunoury, J. (Contributor), Howse, J. R. (Contributor) & Turner, M. (Contributor), Cambridge Crystallographic Data Centre, 7 Mar 2007
DOI: 10.5517/ccn56pp, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccn56pp&sid=DataCite
Dataset

Cite this

@article{0ddb680f8f2d46e4bccc2d5b28fc0809,

title = "Melt-processing of conjugated liquid crystals: A simple route to fabricate OFETs",

abstract = "A simple melt-processing of 5,5'-bis(4-hexylphenyl)-2,2'-bithiophene (DH-PTTP) was analyzed to induce homeotropic alignment of the molecules in the channel of an organic field-effect transistors (OFETs) and to control the thin film morphology. The thermal behavior of DH-PTTP was re-examined using differential scanning calorimetry (DSC) and polarized optical microscopy (POM), and the DSC trace showed three sharp transitions both on cooling and heating. POM observation revealed the appearance of a pronounced striation of the fan-shaped texture that transformed into a mosaic texture on further cooling. Polarized microscopy using OTS-treated glass slides revealed a pseudoisotropic texture on cooling from the isotropic to the SmA phase, consisting with a homeotropic alignment of the molecules in a single monodomain. This homeotropic alignment of liquid-crystalline organic semiconductors appears to be a promising route to control film morphology in the channel of OFETs.",

keywords = "Cyclic voltammetry, Electric current-potential relationship, Field effect transistors, Hole mobility, Liquid crystals (melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs), Electric current carriers (mobility, melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs), hexylphenyl bithiophene liq crystal org field effect transistor",

author = "Maunoury, {Jonathan C.} and Howse, {Jonathan R.} and Turner, {Michael L.}",

note = "CAN 147:20391 76-3 Electric Phenomena School of Chemistry,The University of Manchester,Manchester,UK. Journal 583884-12-2 (5,5'-Bis(4-hexylphenyl)-2,2'-bithiophene) Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)",

year = "2007",

month = mar,

day = "19",

doi = "10.1002/adma.200602859",

language = "English",

volume = "19",

pages = "805--809",

journal = "Advanced Materials ",

issn = "0935-9648",

publisher = "John Wiley & Sons Ltd",

number = "6",

}

TY - JOUR

T1 - Melt-processing of conjugated liquid crystals: A simple route to fabricate OFETs

AU - Maunoury, Jonathan C.

AU - Howse, Jonathan R.

AU - Turner, Michael L.

N1 - CAN 147:20391 76-3 Electric Phenomena School of Chemistry,The University of Manchester,Manchester,UK. Journal 583884-12-2 (5,5'-Bis(4-hexylphenyl)-2,2'-bithiophene) Role: PRP (Properties), TEM (Technical or engineered material use), USES (Uses) (melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)

PY - 2007/3/19

Y1 - 2007/3/19

N2 - A simple melt-processing of 5,5'-bis(4-hexylphenyl)-2,2'-bithiophene (DH-PTTP) was analyzed to induce homeotropic alignment of the molecules in the channel of an organic field-effect transistors (OFETs) and to control the thin film morphology. The thermal behavior of DH-PTTP was re-examined using differential scanning calorimetry (DSC) and polarized optical microscopy (POM), and the DSC trace showed three sharp transitions both on cooling and heating. POM observation revealed the appearance of a pronounced striation of the fan-shaped texture that transformed into a mosaic texture on further cooling. Polarized microscopy using OTS-treated glass slides revealed a pseudoisotropic texture on cooling from the isotropic to the SmA phase, consisting with a homeotropic alignment of the molecules in a single monodomain. This homeotropic alignment of liquid-crystalline organic semiconductors appears to be a promising route to control film morphology in the channel of OFETs.

AB - A simple melt-processing of 5,5'-bis(4-hexylphenyl)-2,2'-bithiophene (DH-PTTP) was analyzed to induce homeotropic alignment of the molecules in the channel of an organic field-effect transistors (OFETs) and to control the thin film morphology. The thermal behavior of DH-PTTP was re-examined using differential scanning calorimetry (DSC) and polarized optical microscopy (POM), and the DSC trace showed three sharp transitions both on cooling and heating. POM observation revealed the appearance of a pronounced striation of the fan-shaped texture that transformed into a mosaic texture on further cooling. Polarized microscopy using OTS-treated glass slides revealed a pseudoisotropic texture on cooling from the isotropic to the SmA phase, consisting with a homeotropic alignment of the molecules in a single monodomain. This homeotropic alignment of liquid-crystalline organic semiconductors appears to be a promising route to control film morphology in the channel of OFETs.

KW - Cyclic voltammetry

KW - Electric current-potential relationship

KW - Field effect transistors

KW - Hole mobility

KW - Liquid crystals (melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)

KW - Electric current carriers (mobility

KW - melt-processing of conjugated liq. crystals: a simple route to fabricate OFETs)

KW - hexylphenyl bithiophene liq crystal org field effect transistor

U2 - 10.1002/adma.200602859

DO - 10.1002/adma.200602859

M3 - Article

VL - 19

SP - 805

EP - 809

JO - Advanced Materials

JF - Advanced Materials

SN - 0935-9648

IS - 6

ER -

Melt-processing of conjugated liquid crystals: A simple route to fabricate OFETs

Abstract

Keywords

Access to Document

Fingerprint

Datasets

CCDC 600832: Experimental Crystal Structure Determination

Cite this