Fig. 5: Transient absorption spectroscopy and light-induced electron paramagnetic resonance characterizations. | Communications Physics

Fig. 5: Transient absorption spectroscopy and light-induced electron paramagnetic resonance characterizations.

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

Fig. 5

a–c Transient absorption spectra for the PBDB-T-SF:IT-4F, PBDB-T-2Cl:IT-4Cl and PBDB-T:ITIC organic bulk heterojunction systems respectively. The insets of a-c are the transient spectra for the organic BHJ systems PBDB-T-SF:IT-4F, PBDB-T-2Cl:IT-4Cl, and PBDB-T:ITIC respectively. d–f Photoexcitation wavelength depdent electron paramagnetic resonance spectra (first-order) for the PBDB-T-SF:IT-4F, and PBDB-T:ITIC organic BHJ systems respectively. g–i Wavelength dependent EPR absorption strengths for the PBDB-T-SF:IT-4F, and PBDB-T:ITIC organic bulk heterojunction systems respectively.

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