| Autor: |
Wetzelaer, G.-J.A.H., Kuik, M., Blom, P.W.M. |
| Jazyk: |
angličtina |
| Rok vydání: |
2012 |
| Předmět: |
|
| Zdroj: |
Advanced Energy Materials, 10, 2, 1232-1237 |
| Popis: |
Charge-transfer (CT) state electroluminescence is investigated in several polymer:fullerene bulk heterojunction solar cells. The ideality factor of the electroluminescence reveals that the CT emission in polymer:fullerene solar cells originates from free-carrier bimolecular recombination at the donor-acceptor interface, rather than a charge-trap-mediated process. The fi ngerprint of the presence of nonradiative trap-assisted recombination, a voltage-dependent CT electroluminescence quantum effi ciency, is only observed for the P3HT:PCBM system, which is explained by a reduction of the competing bimolecular recombination rate. These results are in agreement with measurements of the illumination-intensity dependence of the open-circuit voltage. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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