Rectification in Fullerene (C60)-Phthalocyanine Thin Film Sandwich Structures |
| T. Anderson, L. Akselrod, C.M. Fischer and S. Roth Max-Planck-Institut für Festkörperforschung Heisenbergstr. 1, D-70569 Stuttgart, Germany |
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| Bilayer sandwich structures were fabricated by the sequential thermal evaporation of gold, copper phthalocyanine (CuPc), C60 and gold onto sapphire substrates. When the current-voltage characteristics of a freshly made device are measured in an atmosphere of argon, fairly strong rectification is observed. When the bilayer device is exposed to ammonia vapor, the rectification slowly decreases and almost disappears. If the device is then placed under vacuum and the ammonia removed, the initial conditions slowly return. We attribute the rectification to the formation of a p-n junction. |
| DOI: 10.12693/APhysPolA.87.877 PACS numbers: 73.40.-c, 73.40.Ei, 73.61.Ph |