Highly crystalline, low band-gap semiconducting polymers based on phenanthrodithiophene-benzothiadiazole for solar cells and transistors

Newly developed PDT-benzothiadiazole copolymers formed highly-crystalline films in a highly ordered edge-on manner. As a result, fabricated solar cells and transistor devices showed a moderate PCE of ∼3.8% and a high hole mobility of up to 0.18 cm² V⁻¹ s⁻¹.