UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent]

Title: UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent]

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Abstract

Interfacial electronic structures related to organic electroluminescent (EL) devices were studied by UV photoemission spectroscopy (UPS). The two classes of interfaces studied were: (1) interfaces in a typical multilayer device Al/Alq{sub 3}/TPD/ITO, where Alq{sub 3} is tris(8-hydroxyquinolino)- aluminum, TPD is N,N{prime}-diphenyl-N,N{prime}-(3-methylphenyl)-1,1{prime}-biphenyl-4,4{prime}-diamine, and ITO is indium tin oxide, and (2) TTN/metals and TCNQ/metals interfaces, where TTN is tetrathianaphthacene and TCNQ is tetracyanoquinodimethane. The UPS studies of the specimen formed by the successive deposition of TPD, Alq{sub 3}, and Al on ITO revealed interfacial energy diagrams, with the vacuum level shift of {minus}0.25 eV (downward) and {minus}0.1 eV (downward) at the TPD/ITO and the Alq{sub 3}/TPD interfaces, respectively. The deposition of TTN and TCNQ on metals showed opposite direction of the shift of the vacuum level, with the positive and negative charge at the vacuum side. This can be explained by considering the charge-transfer between the metal and the organic molecule, with these directions being consistent with the electron donating and accepting ability of these molecules.

Authors:: Sugiyama, Kiyoshi; Seki, Kazuhiko; Ito, Eisuke; Ouchi, Yukio; Ishii, Hisao

Publication Date:: 1998-07-01

Research Org.:: Nagoya Univ., Furocho (JP)

OSTI Identifier:: 20034146

Resource Type:: Conference

Resource Relation:: Conference: Electrical, Optical, and Magnetic Properties of Organic Solid-State Materials IV, Boston, MA, (US), 12/01/1997--12/05/1997; Other Information: PBD: 1998; Related Information: In: Electrical, optical, and magnetic properties of organic solid-state materials IV. Materials Research Society, symposium proceedings Volume 488, by Reynolds, J.R.; Jen, A.K.Y.; Rubner, M.F.; Chiang, L.Y.; Dalton, L.R. [eds.], 977 pages.

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; 42 ENGINEERING; ELECTRONIC STRUCTURE; ORGANIC COMPOUNDS; INDIUM OXIDES; TIN OXIDES; COMPOSITE MATERIALS; SEMICONDUCTOR DEVICES; THIN FILMS; INTERFACES; ELECTROLUMINESCENCE; EMISSION SPECTROSCOPY; EXPERIMENTAL DATA

Citation Formats


                    Sugiyama, Kiyoshi, Seki, Kazuhiko, Ito, Eisuke, Ouchi, Yukio, and Ishii, Hisao. UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent].  United States: N. p., 1998. 
        Web.

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                    Sugiyama, Kiyoshi, Seki, Kazuhiko, Ito, Eisuke, Ouchi, Yukio, & Ishii, Hisao. UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent].  United States.

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                    Sugiyama, Kiyoshi, Seki, Kazuhiko, Ito, Eisuke, Ouchi, Yukio, and Ishii, Hisao. Wed .  
        "UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent]".  United States.

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@article{osti_20034146,

  title        = {UV photoemission study of interfaces related to organic EL devices[Ultraviolet, Electroluminescent]},

  author       = {Sugiyama, Kiyoshi and Seki, Kazuhiko and Ito, Eisuke and Ouchi, Yukio and Ishii, Hisao},

  abstractNote = {Interfacial electronic structures related to organic electroluminescent (EL) devices were studied by UV photoemission spectroscopy (UPS). The two classes of interfaces studied were: (1) interfaces in a typical multilayer device Al/Alq{sub 3}/TPD/ITO, where Alq{sub 3} is tris(8-hydroxyquinolino)- aluminum, TPD is N,N{prime}-diphenyl-N,N{prime}-(3-methylphenyl)-1,1{prime}-biphenyl-4,4{prime}-diamine, and ITO is indium tin oxide, and (2) TTN/metals and TCNQ/metals interfaces, where TTN is tetrathianaphthacene and TCNQ is tetracyanoquinodimethane. The UPS studies of the specimen formed by the successive deposition of TPD, Alq{sub 3}, and Al on ITO revealed interfacial energy diagrams, with the vacuum level shift of {minus}0.25 eV (downward) and {minus}0.1 eV (downward) at the TPD/ITO and the Alq{sub 3}/TPD interfaces, respectively. The deposition of TTN and TCNQ on metals showed opposite direction of the shift of the vacuum level, with the positive and negative charge at the vacuum side. This can be explained by considering the charge-transfer between the metal and the organic molecule, with these directions being consistent with the electron donating and accepting ability of these molecules.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/20034146},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1998},

  month        = {7}

}

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