Slowup of bimolecular recombination in organic polymer solar cells

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 congruent to 0.013, and in blends of MEH-PPV with PCBM B/B-L < 0.01.