Determination of the highest occupied molecular orbital energy of pentacene single crystals by ultraviolet photoelectron and photoelectron yield spectroscopies

• Yasuo Nakayama

• Yuki Uragami

• Masayuki Yamamoto

• Shin’ichi Machida

• Hiroumi Kinjo

• Kazuhiko Mase

• Kaveenga Rasika Koswattage

• Hisao Ishii

Abstract

The electronic structures of pentacene single crystals (SCs) were elucidated by ultraviolet photoelectron spectroscopy (UPS) and photoelectron yield spectroscopy (PYS). An asymmetric HOMO peak profile of the pentacene SCs obtained by UPS exhibits a close similarity to the k -projected density-of-states of the valence band that has been predicted by a theoretical calculation [H. Yoshida and N. Sato, Phys. Rev. B 77 , 235205 (2008)]. The ionization energy of the pentacene SCs is successfully determined to be 4.95 (± 0.03) eV which is evidently greater than that of the bulk films of pentacene [4.90 (± 0.02) eV].

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 53 (1S), 01AD03-, 2013-12-31

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360847874818604288
• NII Article ID: 210000143281
• DOI: 10.7567/jjap.53.01ad03
• ISSN: 13474065
• ISSN: 00214922
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.53.01AD03
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.53.01AD03/pdf
• Data Source:
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  • CiNii Articles
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