| Autor: |
Hazel E. Assender, Paul L. Burn, Zhibin Xie, Victor M. Burlakov, Chris R. M. Grovenor, Kiril R. Kirov, B. M. Henry, G. Andrew D. Briggs, Michelle J. Carey |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
SPIE Proceedings. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.557158 |
| Popis: |
We present data on the initial period of operation of Gilch-route NMH-PPV/TiO2 composite solar cells (CSCs) which show that during this period the CSCs operate in a non-steady state regime. The behavior is complex and may include a gradual rise of the open circuit voltage (V-oc) and of the short-circuit current density (J(sc)) with time, a passage through a maximum of either or both parameters, and even a sign reversal. The mechanisms most probably contributing to the transient processes are: i) diffusion driven redistribution of charges resulting in the build up of a quasi steady state charge density profile across the device; ii) photo-doping resulting in a relatively slow increase of the average charge carrier concentration and consequently of the conductivity of the device. The latter is responsible for a strong decrease in V-oc, and is evidenced by the significant increase in dark current after device illumination. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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