Abstract
Organic semiconductor-based thin-film transistors (TFTs) have been extensively studied for organic electronics. In this study, we report on the influence of the polymer gate dielectric viscoelastic properties on overlying organic semiconductor film growth, film microstructure, and TFT response. From the knowledge that nanoscopically-confined thin polymer films exhibit glass-transition temperatures that deviate substantially from those of the corresponding bulk materials, we show here that pentacene (p-channel) and cyanoperylene (n-channel) films grown on polymeric gate dielectrics at temperatures well-below their bulk glass transition temperatures [T g(b)] exhibit morphological/microstructural transitions and dramatic OTFT performance discontinuities at well-defined temperatures [associated with a polymer "surface glass transition temperature," or Tg(s)]. These transitions are characteristic of the particular polymer architecture and independent of film thickness or overall film cooperative chain dynamics. Our results demonstrate that TFT measurements represent a new and sensitive methodology to probe polymer surface viscoelastic properties.
| Original language | English |
|---|---|
| Pages (from-to) | 9122-9132 |
| Number of pages | 11 |
| Journal | Journal of the American Chemical Society |
| Volume | 131 |
| Issue number | 25 |
| DOIs | |
| Publication status | Published - Jul 1 2009 |
Fingerprint
ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
Cite this
Probing the surface glass transition temperature of polymer films via organic semiconductor growth mode, microstructure, and thin-film transistor response. / Kim, Choongik; Facchetti, Antonio; Marks, Tobin J.
In: Journal of the American Chemical Society, Vol. 131, No. 25, 01.07.2009, p. 9122-9132.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Probing the surface glass transition temperature of polymer films via organic semiconductor growth mode, microstructure, and thin-film transistor response
AU - Kim, Choongik
AU - Facchetti, Antonio
AU - Marks, Tobin J
PY - 2009/7/1
Y1 - 2009/7/1
N2 - Organic semiconductor-based thin-film transistors (TFTs) have been extensively studied for organic electronics. In this study, we report on the influence of the polymer gate dielectric viscoelastic properties on overlying organic semiconductor film growth, film microstructure, and TFT response. From the knowledge that nanoscopically-confined thin polymer films exhibit glass-transition temperatures that deviate substantially from those of the corresponding bulk materials, we show here that pentacene (p-channel) and cyanoperylene (n-channel) films grown on polymeric gate dielectrics at temperatures well-below their bulk glass transition temperatures [T g(b)] exhibit morphological/microstructural transitions and dramatic OTFT performance discontinuities at well-defined temperatures [associated with a polymer "surface glass transition temperature," or Tg(s)]. These transitions are characteristic of the particular polymer architecture and independent of film thickness or overall film cooperative chain dynamics. Our results demonstrate that TFT measurements represent a new and sensitive methodology to probe polymer surface viscoelastic properties.
AB - Organic semiconductor-based thin-film transistors (TFTs) have been extensively studied for organic electronics. In this study, we report on the influence of the polymer gate dielectric viscoelastic properties on overlying organic semiconductor film growth, film microstructure, and TFT response. From the knowledge that nanoscopically-confined thin polymer films exhibit glass-transition temperatures that deviate substantially from those of the corresponding bulk materials, we show here that pentacene (p-channel) and cyanoperylene (n-channel) films grown on polymeric gate dielectrics at temperatures well-below their bulk glass transition temperatures [T g(b)] exhibit morphological/microstructural transitions and dramatic OTFT performance discontinuities at well-defined temperatures [associated with a polymer "surface glass transition temperature," or Tg(s)]. These transitions are characteristic of the particular polymer architecture and independent of film thickness or overall film cooperative chain dynamics. Our results demonstrate that TFT measurements represent a new and sensitive methodology to probe polymer surface viscoelastic properties.
UR - http://www.scopus.com/inward/record.url?scp=67649598405&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67649598405&partnerID=8YFLogxK
U2 - 10.1021/ja902788z
DO - 10.1021/ja902788z
M3 - Article
C2 - 19505073
AN - SCOPUS:67649598405
VL - 131
SP - 9122
EP - 9132
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 25
ER -