Solar Cell and Transistor Applications of Naphthodithiophene-Based Polymers (original) (raw)

We report the synthesis and characterization of two novel semiconducting polymers based on naphthodithiophene and their applications to bulk heterojunction solar cells and transistors. The naphthodithiophene based copolymers exhibit a low optical bandgap of ̴ 1.35 eV with the high field-effect hole motility of 2.77  10-2 cm 2 /(Vs). The solar cells made from the polymers yielded power conversion efficiencies of 3.09% and 3.29% under AM 1.5 G irradiation (100mW/cm 2) for PNDTD12 and PzNDTD12 respectively.