Hybrid Characteristics of MoS2 Monolayer with Organic Semiconducting Tetracene and Application to Anti-Ambipolar Field Effect Transistor

An n-type MoS2 monolayer grown by chemical vapor deposition method was partially hybridized with an organic semiconducting p-type tetracene thin film. The photoluminescence (PL) intensity in the hybrid region of the MoS2/tetracene is clearly lower than that of pristine tetracene because of the charge-transfer effect, which was confirmed by the decrease in exciton lifetimes. Decrease in the temperature led to blue-shift in the PL peak position of MoS2 layers and, consequently, the PL intensities of both tetracene and MoS2 considerably increased owing to the decrease in phonon interaction. The PL spectra of bound excitons in the hybrid region were clearly observed at low temperatures, indicating the formation of trap states. The lateral-type n–p heterojunction field-effect transistors (FETs) using the MoS2/tetracene hybrid as an active layer showed gate-tunable rectification I–V and anti-ambipolar field-effect characteristics with hysteresis effect. The charge transport characteristics across the n–p hetero...