Abstract
High air stability is the key issue for the organic thin film transistors (OTFTs). Recently developed high-mobility organic semiconductors, 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (DPh-BTBT) and dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT), are much more stable than pentacene. We measured the ultraviolet photoelectron spectra (UPS) of DPh-BTBT and DNTT and revealed that their HOMOs are situated at deeper energy levels than that of pentacene, which contributes to their high stability. The UPS of DNTT is well reproduced by the DFT calculation, while that of DPh-BTBT is not fully reproduced. This difference is discussed in terms of dihedral angle between the phenyl groups and the BTBT ring.
| Original language | English |
|---|---|
| Pages (from-to) | 55-57 |
| Number of pages | 3 |
| Journal | Chemical Physics Letters |
| Volume | 563 |
| DOIs | |
| Publication status | Published - Mar 20 2013 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Physics and Astronomy(all)
Cite this
Ultraviolet photoelectron spectra of 2,7-diphenyl[1]benzothieno[3,2-b][1] benzothiophene and dinaphtho[2,3-b : 2′,3′-f]thieno[3,2-b]thiophene. / Yagi, H.; Miyazaki, Takafumi; Tokumoto, Y.; Aoki, Y.; Zenki, M.; Zaima, T.; Okita, S.; Yamamoto, T.; Miyazaki, E.; Takimiya, K.; Hino, S.
In: Chemical Physics Letters, Vol. 563, 20.03.2013, p. 55-57.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultraviolet photoelectron spectra of 2,7-diphenyl[1]benzothieno[3,2-b][1] benzothiophene and dinaphtho[2,3-b
T2 - 2′,3′-f]thieno[3,2-b]thiophene
AU - Yagi, H.
AU - Miyazaki, Takafumi
AU - Tokumoto, Y.
AU - Aoki, Y.
AU - Zenki, M.
AU - Zaima, T.
AU - Okita, S.
AU - Yamamoto, T.
AU - Miyazaki, E.
AU - Takimiya, K.
AU - Hino, S.
PY - 2013/3/20
Y1 - 2013/3/20
N2 - High air stability is the key issue for the organic thin film transistors (OTFTs). Recently developed high-mobility organic semiconductors, 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (DPh-BTBT) and dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT), are much more stable than pentacene. We measured the ultraviolet photoelectron spectra (UPS) of DPh-BTBT and DNTT and revealed that their HOMOs are situated at deeper energy levels than that of pentacene, which contributes to their high stability. The UPS of DNTT is well reproduced by the DFT calculation, while that of DPh-BTBT is not fully reproduced. This difference is discussed in terms of dihedral angle between the phenyl groups and the BTBT ring.
AB - High air stability is the key issue for the organic thin film transistors (OTFTs). Recently developed high-mobility organic semiconductors, 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (DPh-BTBT) and dinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene (DNTT), are much more stable than pentacene. We measured the ultraviolet photoelectron spectra (UPS) of DPh-BTBT and DNTT and revealed that their HOMOs are situated at deeper energy levels than that of pentacene, which contributes to their high stability. The UPS of DNTT is well reproduced by the DFT calculation, while that of DPh-BTBT is not fully reproduced. This difference is discussed in terms of dihedral angle between the phenyl groups and the BTBT ring.
UR - http://www.scopus.com/inward/record.url?scp=84874941448&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84874941448&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2013.02.011
DO - 10.1016/j.cplett.2013.02.011
M3 - Article
VL - 563
SP - 55
EP - 57
JO - Chemical Physics Letters
JF - Chemical Physics Letters
SN - 0009-2614
ER -