| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440437 | Synthetic Metals | 2015 | 4 Pages |
•rrP3HT/PCBM bulk hetero-junction photo-voltaic cell produced photocurrent (PC) upon 470 nm LED irradiation.•The resulting photocurrent were studied using high (up to 8.5 T) magnetic field (MPC).•The observed high field MPC is attributed to a spin-mixing mechanism caused by the difference in the donor-acceptor g-factors.•The non-saturating MPC response at high field is interpreted as due to charge transfer excitons with in the sub-nanosecond lifetime.•The MPC response profile is highly non-Lorentzian due to a dispersive decay mechanism.
We analyze the high field (up to 8.5 T) non-saturating magneto-photocurrent (MPC) in rrP3HT/PCBM bulk hetero-junction photo-voltaic cells. We attribute the observed high field MPC at room temperature to a spin-mixing mechanism caused by the difference in the donor-acceptor g-factors. The non-saturating MPC response at high field indicates that there exist charge transfer excitons with lifetime in the sub-nanosecond time domain. The MPC response profile is highly non-Lorentzian. We explain this non-Lorentzian shape by a dispersive decay mechanism that originates due to a broad distribution of charge transfer exciton lifetimes.
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