Effects of the ambient exposure on the electronic states of the clean surface of the pentacene single crystal

Yuta Mizuno; Masayuki Yamamoto; Hiroumi Kinjo; Kazuhiko Mase; Hisao Ishii; Koji K. Okudaira; Hiroyuki Yoshida; Yasuo Nakayama

doi:10.1080/15421406.2017.1302001

Effects of the ambient exposure on the electronic states of the clean surface of the pentacene single crystal

Yuta Mizuno, Masayuki Yamamoto, Hiroumi Kinjo, Kazuhiko Mase, Hisao Ishii, Koji K. Okudaira, Hiroyuki Yoshida, Yasuo Nakayama

Department of Pure and Applied Chemistry

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

8 Citations (Scopus)

Abstract

Understanding of the electronic structures is indispensable for complete elucidation of the charge carrier behaviors in organic semiconductors. Although recent progress enabling accurate photoemission demonstrations of organic single crystals has greatly promoted such understanding, it had been achieved merely on partially oxidized surfaces by exposure to ambient conditions. In this study, we successfully prepared an oxide-free surface of the pentacene single crystal (PnSC) by cleavage in vacuum. X-ray and ultraviolet photoelectron spectroscopy measurements on the PnSC clean surface revealed improved energetic homogeneity of the C1s level and highest-occupied state in comparison to those of the partially oxidized surface.

Original language	English
Pages (from-to)	216-222
Number of pages	7
Journal	Molecular crystals and liquid crystals
Volume	648
Issue number	1
DOIs	https://doi.org/10.1080/15421406.2017.1302001
Publication status	Published - 3 May 2017

Keywords

Organic semiconductor
Surface oxidation
Synchrotron radiation
X-ray photoelectron spectroscopy

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10.1080/15421406.2017.1302001

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abstract = "Understanding of the electronic structures is indispensable for complete elucidation of the charge carrier behaviors in organic semiconductors. Although recent progress enabling accurate photoemission demonstrations of organic single crystals has greatly promoted such understanding, it had been achieved merely on partially oxidized surfaces by exposure to ambient conditions. In this study, we successfully prepared an oxide-free surface of the pentacene single crystal (PnSC) by cleavage in vacuum. X-ray and ultraviolet photoelectron spectroscopy measurements on the PnSC clean surface revealed improved energetic homogeneity of the C1s level and highest-occupied state in comparison to those of the partially oxidized surface.",

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AU - Mizuno, Yuta

AU - Yamamoto, Masayuki

AU - Kinjo, Hiroumi

AU - Mase, Kazuhiko

AU - Ishii, Hisao

AU - Okudaira, Koji K.

AU - Yoshida, Hiroyuki

AU - Nakayama, Yasuo

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AB - Understanding of the electronic structures is indispensable for complete elucidation of the charge carrier behaviors in organic semiconductors. Although recent progress enabling accurate photoemission demonstrations of organic single crystals has greatly promoted such understanding, it had been achieved merely on partially oxidized surfaces by exposure to ambient conditions. In this study, we successfully prepared an oxide-free surface of the pentacene single crystal (PnSC) by cleavage in vacuum. X-ray and ultraviolet photoelectron spectroscopy measurements on the PnSC clean surface revealed improved energetic homogeneity of the C1s level and highest-occupied state in comparison to those of the partially oxidized surface.

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KW - Surface oxidation

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Effects of the ambient exposure on the electronic states of the clean surface of the pentacene single crystal

Abstract

Keywords

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