Effect of the phase states of self-assembled monolayers on pentacene growth and thin-film transistor characteristics

Hwa Sung Lee, Do Hwan Kim, Jeong Ho Cho, Minkyu Hwang, Yunseok Jang, Kilwon Cho

Research output: Contribution to journalArticle

175 Citations (Scopus)

Abstract

To investigate the effects of the phase state (ordered or disordered) of self-assembled monolayers (SAMs) on the growth mode of pentacene films and the performance of organic thin-film transistors (OTFTs), we deposited pentacene molecules on SAMs of octadecyltrichlorosilane (ODTS) with different alkyl-chain orientations at various substrate temperatures (30, 60, and 90°C). We found that the SAM phase state played an important role in both cases. Pentacene films grown on relatively highly ordered SAMs were found to have a higher crystallinity and a better interconnectivity between the pentacene domains, which directly serves to enhance the field-effect mobility, than those grown on disordered SAMs. Furthermore, the differences in crystallinity and field-effect mobility between pentacene films grown on ordered and disordered substrates increased with increasing substrate temperature. These results can be possibly explained by (1) a quasi-epitaxy growth of the pentacene film on the ordered ODTS monolayer and (2) the temperature-dependent alkyl chain mobility of the ODTS monolayers.

Original languageEnglish
Pages (from-to)10556-10564
Number of pages9
JournalJournal of the American Chemical Society
Volume130
Issue number32
DOIs
Publication statusPublished - 2008 Aug 13

Fingerprint

Self assembled monolayers
Thin film transistors
Growth
Monolayers
Substrates
Temperature
Epitaxial growth
pentacene
Molecules
octadecyltrichlorosilane

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Lee, Hwa Sung ; Kim, Do Hwan ; Cho, Jeong Ho ; Hwang, Minkyu ; Jang, Yunseok ; Cho, Kilwon. / Effect of the phase states of self-assembled monolayers on pentacene growth and thin-film transistor characteristics. In: Journal of the American Chemical Society. 2008 ; Vol. 130, No. 32. pp. 10556-10564.
@article{4dd29187d50341f292399134c35575e0,
title = "Effect of the phase states of self-assembled monolayers on pentacene growth and thin-film transistor characteristics",
abstract = "To investigate the effects of the phase state (ordered or disordered) of self-assembled monolayers (SAMs) on the growth mode of pentacene films and the performance of organic thin-film transistors (OTFTs), we deposited pentacene molecules on SAMs of octadecyltrichlorosilane (ODTS) with different alkyl-chain orientations at various substrate temperatures (30, 60, and 90°C). We found that the SAM phase state played an important role in both cases. Pentacene films grown on relatively highly ordered SAMs were found to have a higher crystallinity and a better interconnectivity between the pentacene domains, which directly serves to enhance the field-effect mobility, than those grown on disordered SAMs. Furthermore, the differences in crystallinity and field-effect mobility between pentacene films grown on ordered and disordered substrates increased with increasing substrate temperature. These results can be possibly explained by (1) a quasi-epitaxy growth of the pentacene film on the ordered ODTS monolayer and (2) the temperature-dependent alkyl chain mobility of the ODTS monolayers.",
author = "Lee, {Hwa Sung} and Kim, {Do Hwan} and Cho, {Jeong Ho} and Minkyu Hwang and Yunseok Jang and Kilwon Cho",
year = "2008",
month = "8",
day = "13",
doi = "10.1021/ja800142t",
language = "English",
volume = "130",
pages = "10556--10564",
journal = "Journal of the American Chemical Society",
issn = "0002-7863",
publisher = "American Chemical Society",
number = "32",

}

Effect of the phase states of self-assembled monolayers on pentacene growth and thin-film transistor characteristics. / Lee, Hwa Sung; Kim, Do Hwan; Cho, Jeong Ho; Hwang, Minkyu; Jang, Yunseok; Cho, Kilwon.

In: Journal of the American Chemical Society, Vol. 130, No. 32, 13.08.2008, p. 10556-10564.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of the phase states of self-assembled monolayers on pentacene growth and thin-film transistor characteristics

AU - Lee, Hwa Sung

AU - Kim, Do Hwan

AU - Cho, Jeong Ho

AU - Hwang, Minkyu

AU - Jang, Yunseok

AU - Cho, Kilwon

PY - 2008/8/13

Y1 - 2008/8/13

N2 - To investigate the effects of the phase state (ordered or disordered) of self-assembled monolayers (SAMs) on the growth mode of pentacene films and the performance of organic thin-film transistors (OTFTs), we deposited pentacene molecules on SAMs of octadecyltrichlorosilane (ODTS) with different alkyl-chain orientations at various substrate temperatures (30, 60, and 90°C). We found that the SAM phase state played an important role in both cases. Pentacene films grown on relatively highly ordered SAMs were found to have a higher crystallinity and a better interconnectivity between the pentacene domains, which directly serves to enhance the field-effect mobility, than those grown on disordered SAMs. Furthermore, the differences in crystallinity and field-effect mobility between pentacene films grown on ordered and disordered substrates increased with increasing substrate temperature. These results can be possibly explained by (1) a quasi-epitaxy growth of the pentacene film on the ordered ODTS monolayer and (2) the temperature-dependent alkyl chain mobility of the ODTS monolayers.

AB - To investigate the effects of the phase state (ordered or disordered) of self-assembled monolayers (SAMs) on the growth mode of pentacene films and the performance of organic thin-film transistors (OTFTs), we deposited pentacene molecules on SAMs of octadecyltrichlorosilane (ODTS) with different alkyl-chain orientations at various substrate temperatures (30, 60, and 90°C). We found that the SAM phase state played an important role in both cases. Pentacene films grown on relatively highly ordered SAMs were found to have a higher crystallinity and a better interconnectivity between the pentacene domains, which directly serves to enhance the field-effect mobility, than those grown on disordered SAMs. Furthermore, the differences in crystallinity and field-effect mobility between pentacene films grown on ordered and disordered substrates increased with increasing substrate temperature. These results can be possibly explained by (1) a quasi-epitaxy growth of the pentacene film on the ordered ODTS monolayer and (2) the temperature-dependent alkyl chain mobility of the ODTS monolayers.

UR - http://www.scopus.com/inward/record.url?scp=49449099236&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=49449099236&partnerID=8YFLogxK

U2 - 10.1021/ja800142t

DO - 10.1021/ja800142t

M3 - Article

C2 - 18630908

AN - SCOPUS:49449099236

VL - 130

SP - 10556

EP - 10564

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

SN - 0002-7863

IS - 32

ER -