Figure 2: MPC of various photovoltaic cells. | Nature Communications

Figure 2: MPC of various photovoltaic cells.

From: Short-lived charge-transfer excitons in organic photovoltaic cells studied by high-field magneto-photocurrent

Figure 2

The MPC(B) response of several bulk hetero-junction OPV cells based on D–A blends of various polymer donors and PCBM, measured at zero bias and room temperature. (a) I–V characteristics measured under the following conditions; (1) dark, (2,3) standard SUN AM1.5 illumination for rrP3HT/C61–PCBM (1.2:1 weight ratio), power conversion efficiency (PCE)=3.2% (2) and PBT7/PC71–BM with 3% dithiol molecules additive, PCE=6.2% (3). (b) MPC(B) response of rrP3HT/PCBM (1.2:1 weight ratio), PCE=3.2%. (c) MPC(B) response for rrP3HT/PCBM (1:1 weight ratio), PCE=1.7%. (d) MPC(B) for PBT7/C71–PCBM with 3% dithiol molecule additives, PCE=6.2%. (e) rraP3HT/C61–PCBM, PCE<1%. (f) MEH-PPV/ C61–PCBM, PCE<1%. The solid red lines through the data points represent simulations to the MPC(B) response using the ‘Δg dispersive relaxation’ model (see text); the fitting parameters are given in Supplementary Table 1.

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