1990 Fiscal Year Final Research Report Summary
Study of the Electronic Structures of Organic Solids by Inverse Photoemission Spectroscopy
| Project/Area Number |
01470012
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理化学一般
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| Research Institution | Hiroshima University |
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Principal Investigator |
SEKI Kazuhiko Dept. Materials Sci., Hiroshima Univ., Assoc. Prof., 理学部・物性学科, 助教授 (80124220)
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| Co-Investigator(Kenkyū-buntansha) |
OHTA Toshaki Dept. Materials Sci., Hiroshima Univ., Prof., 理学部・物性学科, 教授 (80011675)
YOKOYAMA Toshihiko Dept. Materials Sci., Hiroshima Univ., Res. Assoc., 理学部・物性学科, 助手 (20200917)
TANIGUCHI Masaki Dept. Materials Sci., Hiroshima Univ., Assoc. Prof., 理学部・物性学科, 助教授 (10126120)
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| Project Period (FY) |
1989 – 1990
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| Keywords | Inverse Photoemission / Organic Solids / Electronic State / Vacant States / Electronic Structure / Electron Affinity / Benzene / Copper Phthalocyanine |
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| Research Abstract |
Inverse photoemission spectroscopy is a powerful technique for examining the electronic structures of solids by measuring the emission of high energy photons caused by impinging electrons into the solid sample. In this research project, we have constructed an inverse photoemission spectrometer for studying the structure of the vacant electron-ic states in organic solids, about which only little information have been studied previously. We designed the spectrometer consulting with the groups of Tokyo University. Who have already constructed their own spectrometer. Special care was paid for designing an instrument suitable for studying both organic and inorganic solids. By the beginning of the academic year of 1991. We completed the construction of the vacuum chambers, parts for the electron gun, light detection system, and the electronics system. Also we have developed the software for handling the collected data. These parts were assembled together, followed by the vacuum test, activat
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ion and adjustment of the electron gun, and other adjustments. After these things were finished satisfactory, the inverse photoemission spectra of evaporated gold films were measured for examining the performance of the instrument, giving spectra in good agreement with those reported in the literature. With establishing the successful construction of the spectrometer, we proceeded in measuring the inverse photoemission spectra of the semiconductors Te, SnTe, and PbTe, for which no previous reports are available. The obtained spectra give information about the electronic structures of the vacant states of these materials. Then we have measured the inverse photoemission spectra of representative organic solids : benzene and Cuphthalocyanine, which gave information about the electronic structures of these materials such as the energy of the lowest vacant orbitals. Although there still exist several experimental problems. The present study opened a way for more detailed understanding of the electronic structures of organic solids. Less
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[Publications] K.Yokoyama,S.Asai,K.Nishihara,D.Ide,Y.Ueda,M.Taniguchi,H.Namba,H.Kuroda,H.Namatame,H.Matsubara,S.Suga,K.Seki,and T.Ohta: "Core Excitons and Band Structures in SnSe and SnTe Single Crystals" Physical Review B.
Description
「研究成果報告書概要(和文)」より
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[Publications] K. Yokoyama, S. Asahi, K. Nishihara, D. Ide, Y. Ueda, M. Taniguchi. H. Namba, H. Kuroda, H. Namatame, H. Matsubara, S. Suga, K. Seki, and T. Ohta: "Core Excitons and Band Structures in SnSe and SnTe Single Crystals" Phys. Rev. B.
Description
「研究成果報告書概要(欧文)」より
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