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

H. Yagi; T. Miyazaki; Y. Tokumoto; Y. Aoki; M. Zenki; T. Zaima; S. Okita; T. Yamamoto; E. Miyazaki; K. Takimiya; S. Hino

doi:10.1016/j.cplett.2013.02.011

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

H. Yagi, T. Miyazaki, Y. Tokumoto, Y. Aoki, M. Zenki, T. Zaima, S. Okita, T. Yamamoto, E. Miyazaki, K. Takimiya, S. Hino

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

15 Citations (Scopus)

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	https://doi.org/10.1016/j.cplett.2013.02.011
Publication status	Published - Mar 20 2013
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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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, T.; 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 › peer-review

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title = "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",

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.",

author = "H. Yagi and T. Miyazaki and Y. Tokumoto and Y. Aoki and M. Zenki and T. Zaima and S. Okita and T. Yamamoto and E. Miyazaki and K. Takimiya and S. Hino",

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AU - Yagi, H.

AU - Miyazaki, T.

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.

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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

Abstract

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