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Measurement of Surface Potential at Metal/Organic-Material Interfaces by Electro-Absorption Method |
| CHENG Xiao-Man1,2;YAO Su-Wei1;LI Cheng-Quan3;MANAKA Takaaki3;IWAMOTO Mitsumasa3 |
| 1School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072
2Department of Opto-Electronic Information and Electrical Engineering, Tianjin Institute of Technology,Tianjin 300191
3Department of Physical Electronics, Tokyo Institute of Technology, Tokyo 152-8552, Japan |
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| Cite this article: |
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CHENG Xiao-Man, YAO Su-Wei, LI Cheng-Quan et al 2004 Chin. Phys. Lett. 21 2026-2028 |
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Abstract The surface potential built-in vacuum deposited phthalocyanine (Pc) film on aluminium electrode is investigated by the electro-modulation method. To avoid the influence of charge injection, a sandwiched cell (Al-Pc-air-ITO) is fabricated. The modulation signal, which depends on the external electric field intensity, is detected. The properties of electro-absorption (EA) and electro-reflectance (ER) signals are analysed. The existence of the surface potential at the metal/organic-material interface induces 1f referenced ER signals. As a result, the surface potential built across the vacuum-deposited Pc film on the aluminium electrode is estimated to be 1.23V.
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| Keywords:
68.47.Mn
34.20.Gj
73.50.-h
82.35.Ej
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Published: 01 October 2004
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| PACS: |
68.47.Mn
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(Polymer surfaces)
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34.20.Gj
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(Intermolecular and atom-molecule potentials and forces)
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73.50.-h
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(Electronic transport phenomena in thin films)
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82.35.Ej
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(Nonlinear optics with polymers)
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