Fig. 4: Magneto-photocurrent measurements and analyses for the IT-series. | Communications Physics

Fig. 4: Magneto-photocurrent measurements and analyses for the IT-series.

From: Coherent spin mixing at charge transfer states for spin polaron pair dissociation and energy loss in organic bulk heterojunction solar cells

Fig. 4

Experimental results of magneto-photocurrent (MPC, dotted lines) for the organic blends using the three different photoexcitation wavelengths, such as a λ = 532 nm, b λ = 635 nm, and c λ = 721 nm. The photoactive layers are made of PBDB-T:ITIC, PBDB-T-SF:IT-4F, and PBDB-T-2Cl:IT-4Cl. All the red solid lines are the fitting curves. Extracted numerical values through theoretical fittings of a-c for the laser wavelength-dependent d hyperfine field parameter \(({a}_{{HF}}/{\mu }_{B})\), e spin-orbit coupling field parameter \(({a}_{{SOC}}/{\mu }_{B})\), f polaron pair \(g\)-facor difference \((\Delta g)\), g singlet polaron pair decay rate \(({\gamma }_{S})\), h triplet polaron pair decay rate \(({\gamma }_{T})\), and i ratio of the singlet to triplet decay rate \(({\gamma }_{S}/{\gamma }_{T})\).

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