Improved Hole-Transporting Properties in Conjugated Polymers Mixed with Polystyrene as an Insulating Polymer

Abstract

4. Conclusion New, arch-shaped NFAs, vNTz-TehR and vNTz-TboR, were developed by introducing a vNTz unit into the central part of a π-conjugated backbone. Upon comparing vNTz-TboR to NTz-TboR, it was evident that the low-symmetry unit (vNTz) of the former material provided it with a higher solubility than that of the latter. Furthermore, electrochemical measurements indicated that vNTz-TboR and NTz-TboR showed almost identical LUMO energy levels. An OSC based on P3HT/vNTz-TehR showed a PCE of 2.06%, and the contact angle measurements implied that the vNTz-TehR film has a favorable surface for photo-carrier generation. Thus, this study demonstrated the potential applicability of arch-shaped NTz derivatives in organic electronics.