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The Effect of Energy Levels of the Electron Acceptor Materials on Organic Photovoltaic Cells
Laboratoire de Photovolta?ques, Centre de Recherches et des Technologies de l’Energie, BP 95, 2050 Hammam-Lif, Tunisia
- 1 Laboratoire de Photovolta?ques, Centre de Recherches et des Technologies de l’Energie, BP 95, 2050 Hammam-Lif, Tunisia
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Smart Grid and Renewable Energy·Volume 02 (2011)·Pages 278–281·Published 2 August 2011·DOI10.4236/sgre.2011.23031
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Abstract
Organic photovoltaic cells have been fabricated using copper phthalocyanine CuPc as electron donor and C60 or PCBM as electron acceptor. We have investigated the I-V measurements of two different structures: ITO/PEDOT: PSS/(CuPc:C60 or CuPc:PCBM)/BCP/Al. We have observed that the substitution of PCBM by C60 scales up the photocurrent and the efficiency of the devices. As for the open-circuit voltage and the fill factor, we have seen that Voc and FF depend on the energy difference between the highest occupied molecular orbital (HOMO) of CuPc and the lowest unoccupied molecular orbital (LUMO)of C60 or PCBM.
KeywordsCuPcC60PCBMEnergy LevelsOrganic Photovoltaic Cells
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