Investigation of interfacial charging and discharging in double-layer pentacene-based metal-insulator-metal device with polyterpenol blocking layer using electric field induced second harmonic generation

► Polyterpenol fabricated from environmentally friendly source. ► Smooth injection of carriers, fast charging of pentacene-polyterpenol interface. ► Discharging of holes involved the carriers drifting back into Au electrode. ► Discharging of electrons entailed an injection of holes from Au electrode. ► Polyterpenol was demonstrated to be a sound blocking material.