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• W2585751566 abstract "Abstract Single material organic solar cells become an interesting area of research to overcome the challenges with efficient charge separation efficiencies in conventional organic solar cells. In this article, we have synthesized nonmetallated and metallated porphyrin‐fullerene dyad materials (H2P‐C60 and ZnP‐C60, respectively) with simple structure, comprehensively studied their charge transfer mechanism, and established a proof of concept that nonmetallated porphyrin‐fullerene dyads are better candidates to be used in organic solar cells compared with metallated dyads. Absorption and electrochemical analysis revealed the ground state electronic interactions between donor‐acceptor moieties in both types of dyads. Driving force (−ΔG o ET ) for intramolecular electron transfer process was calculated by first oxidation and reduction potentials of dyads. The excited state electronic interactions were characterized by time‐resolved fluorescence and pump‐probe transient absorption experiments. Strong fluorescence quenching of porphyrin along with reduced lifetimes in dyads due to deactivation of singlet excited states by photoinduced charge transfer process between porphyrin/Zn‐porphyrin core and fullerene in different polarity solvents was observed. Transient absorption spectroscopy was also applied to identify the transient spectral features, ie, cationic (H2P + /ZnP + ) and anionic (C 60 − ) radicals formed because of the charge separation in both types of dyads. Finally, organic solar cell device was also fabricated using the dyads. We obtained higher V oc , J sc , and fill factor in single material organic solar cell using H2P‐C60 compared to previous reports." @default.
• W2585751566 created "2017-02-10" @default.
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• W2585751566 date "2017-02-03" @default.
• W2585751566 modified "2023-10-16" @default.
• W2585751566 title "Comparative charge transfer studies in nonmetallated and metallated porphyrin fullerene dyads" @default.
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• W2585751566 doi "https://doi.org/10.1002/poc.3685" @default.
• W2585751566 hasPublicationYear "2017" @default.
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