| Autor: |
Müller, T. C. M., Tran, T. M. H., Pieters, B. E., Gerber, A., Carius, R., Rau, U. |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 10/28/2013, Vol. 103 Issue 18, p183504, 5p, 4 Graphs |
| Abstrakt: |
ZnO/CdS/Cu(In,Ga)Se2 solar cells are investigated by spectrally resolved electroluminescence and electro-modulated photoluminescence. The results agree well with the reciprocity relation between luminescence emission and photovoltaic quantum efficiency. In contrast, the superposition of photoluminescence and electroluminescence emission is warranted only in a limited injection range. At higher injection levels, we observe a characteristic discrepancy between electroluminescence and electro-modulated photoluminescence which is reduced by light soaking. We attribute this anomaly to a potential barrier close to the CdS/Cu(In,Ga)Se2 interface. Hole injection into the space charge region during light soaking reduces this barrier and enhances the luminescence efficiency by a factor of 2.5. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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