Modeling the short-circuit current density of polymer solar cells based on P3HT:PCBM blend

We have investigated the short-circuit current density of organic solar cells based on poly (3-hexylthiophene)(P3HT)/6,6-phenyl C61-butyric acid methyl ester (PCBM) blend. In order to model charge collection efficiencies with respect to short circuit density in such blends, a full optical modeling of the cell is performed. From the distribution of the electromagnetic field, we compute the rate of exciton generation. This exciton generation rate is used as input in the transport equations of holes and electrons. Charge densities at steady state are obtained as solutions are used for computing short-circuit current densities generated in the cell. The dependence of short-circuit current densities versus the thickness of the blend is analyzed and compared with our experimental data and with data extracted from the literature.

[1]  Michael Niggemann,et al.  Efficiency limiting morphological factors of MDMO-PPV:PCBM plastic solar cells , 2006 .

[2]  Ronn Andriessen,et al.  Disclosure of the nanostructure of MDMO-PPV:PCBM bulk hetero-junction organic solar cells by a combination of SPM and TEM , 2003 .

[3]  O. Inganäs,et al.  Optical modelling of a layered photovoltaic device with a polyfluorene derivative/fullerene as the active layer , 2004 .

[4]  Christoph J. Brabec,et al.  Organic photovoltaics: technology and market , 2004 .

[5]  O. Inganäs,et al.  Optical optimization of polyfluorene-fullerene blend photodiodes , 2005 .

[6]  Duncan W. McBranch,et al.  Charge-transfer range for photoexcitations in conjugated polymer/fullerene bilayers and blends , 1997 .

[7]  Carole Sentein,et al.  Accelerated lifetime measurements of P3HT:PCBM solar cells , 2006 .

[8]  Yang Yang,et al.  High-efficiency solution processable polymer photovoltaic cells by self-organization of polymer blends , 2005 .

[9]  Xiaoniu Yang,et al.  Nanoscale morphology of high-performance polymer solar cells. , 2005, Nano letters.

[10]  Ronald Österbacka,et al.  Charge carrier mobility and lifetime versus composition of conjugated polymer/fullerene bulk-heterojunction solar cells , 2006 .

[11]  Moses,et al.  Ultrafast spectroscopic studies of photoinduced electron transfer from semiconducting polymers to C60. , 1994, Physical review. B, Condensed matter.

[12]  Valentin D. Mihailetchi,et al.  Device model for the operation of polymer/fullerene bulk heterojunction solar cells , 2005 .

[13]  D. Bradley,et al.  Charge recombination in polymer/fullerene photovoltaic devices , 2003, 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of.

[14]  O. Inganäs,et al.  Modeling electrical transport in blend heterojunction organic solar cells , 2005 .

[15]  Valentin D. Mihailetchi,et al.  Charge Transport and Photocurrent Generation in Poly(3‐hexylthiophene): Methanofullerene Bulk‐Heterojunction Solar Cells , 2006 .

[16]  Gang Li,et al.  Investigation of annealing effects and film thickness dependence of polymer solar cells based on poly(3-hexylthiophene) , 2005 .