Mobility enhancement by using silk fibroin in F16CuPc organic thin film transistors

► Silk fibroin is a protein that serves as a gate dielectric for flexible n-type F16CuPc organic thin-film transistors. ► F16CuPc is deposited onto silk fibroin at room temperature. ► Crystal quality of F16CuPc is improved by using silk fibroin as the gate dielectric. ► The average μFE value is 0.39 cm2 V−1 s−1 much higher than the reported values of F16CuPc organic thin-film transistors.