For the retrieval of best polymers for effective organic solar cells as testing parameter we have used the coefficient of bimolecular recombination (B). The B measurement demonstrated that in pure MEH-PPV layers its value is close to the value of Langevin recombination coefficient (B_L), while in case of perylene/MEH-PPV junction layers the ratio B/B_L≅0.013, and in blends of MEH-PPV with PCBM B/B_L<:0.01.
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