Browsing by Subject "Ambipolar charge transport"

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    Electrochemical stability and ambipolar charge transport in diketopyrrolopyrrole-based organic materials
    (ACS, 2019) Ray, S.; Panidi, J.; Mukhopadhyay, T.; Salzner, Ulrike; Anthopoulos, T. D.; Patil, S.
    An important strategy for realizing flexible complementary circuits with organic semiconductors is to achieve balanced ambipolar charge transport properties with reduced anisotropy. Here, we present a series of star-shaped diketopyrrolopyrrole (DPP)-based organic materials synthesized for improved intermolecular charge transport while retaining the ambipolar charge transport properties of their linear counterparts. Steady-state UV−visible spectroscopic studies confirm that the oligomers are highly aggregated in the thin film as evidenced from appearance of prominent vibronic features and red-shifted absorption bands. Ambipolar transport properties of these materials were verified in organic field-effect transistors (OFETs). The results show that the star-shaped DPP systems have the potential to outperform their linear counterparts in devices