Highly UV‐Sensitive and Responsive Benzothiophene/Dielectric Polymer Blend‐Based Organic Thin‐Film Phototransistor

It is reported on drain current modulation by UV light, in an organic thin‐film phototransistor, based on a small molecule semiconductor 2,7‐dipentylbenzo[b]benzo[4,5]thieno[2,3‐d]thiophene (BTBT‐C5) blended with a linear unsaturated polyester (L‐upe) to form the active channel material. The electrical properties of the phototransistor (L‐upe+BTBT‐C5) and physical properties of thin‐films are evaluated by means of two‐ and three‐terminal …