| Autor: |
Heggie, D. A., MacDonald, B. L., Hill, I. G. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 11/15/2006, Vol. 100 Issue 10, p104505, 4p, 1 Diagram, 3 Graphs |
| Abstrakt: |
Organic photovoltaic heterojunction devices consisting of copper phthalocyanine and 3,4,9,10-perylene-tetracarboxylic dianhydride (CuPc-PTCDA) show time dependent short circuit current under both AM1.5D and 465 nm illuminations, but not under longer-wavelength illumination. Higher energy photons result in a short circuit current that decays, and sometimes changes sign, with a time scale on the order of minutes. This is attributed to short-wavelength absorption in PTCDA leading to spontaneous exciton dissociation and free holes within the PTCDA. Charged impurities in PTCDA, formed by the trapping of these free holes, drift inside the device forming a Helmholtz double layer at the indium tin oxide contact resulting in a redistribution of the internal electric fields and a corresponding shift in short circuit current. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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