External controlling the phase transition behavior of vanadium dioxide is important to realize its practical applications as energy-efficient electronic devices. Because of its relatively high phase transition temperature of 68 degrees C, the central challenge for VO2-based electronics, lies in finding an energy efficient way, to modulate the phase transition in a reversible and reproducible manner. In this work, we report an experimental realization of p-n heterojunctions by growing VO2 film on p-type GaN substrate. By adding the bias voltage on the p-n junction, the metal-insulator transition behavior of VO2 film can be changed continuously. It is demonstrated that the phase transition of VO2 film is closely associated with the carrier distribution within the space charge region, which can be directly controlled by the bias voltage. Our findings offer novel opportunities for modulating the phase transition of VO2 film in a reversible way as well as extending the concept of electric-field modulation on other phase transition materials.
Chen, FH,Fan, LL,Chen, S,et al. Control of the Metal-Insulator Transition in VO2 Epitaxial Film by Modifying Carrier Density[J]. ACS APPLIED MATERIALS & INTERFACES,2015,7(12):6875-6881.
Chen, FH.,Fan, LL.,Chen, S.,Liao, GM.,Chen, YL.,...&吴自玉.(2015).Control of the Metal-Insulator Transition in VO2 Epitaxial Film by Modifying Carrier Density.ACS APPLIED MATERIALS & INTERFACES,7(12),6875-6881.
Chen, FH,et al."Control of the Metal-Insulator Transition in VO2 Epitaxial Film by Modifying Carrier Density".ACS APPLIED MATERIALS & INTERFACES 7.12(2015):6875-6881.