Performance Analysis of Molybdenum ditelluride (MoTe2) Material and its Comparison with Other 2D Materials

In this paper, the MoTe2 based FET transistor has been designed and simulated with MoTe2 as a channel material, and compared its performance with other 2D materials as channel materials. Molybdenum ditelluride (MoTe2) is one of the material belonging to the TMDC (Transition metal dichalcogenides) family used in many electronic and optoelectronics applications due to its tunable band-gap and its high stability nature. The MoTe2 based FET transistor was simulated in different structural styles for its input and output characteristics using the TCAD simulation tool. Initially, a generalized structure of the FET transistor with MoTe2 as a channel material was simulated, later MoTe2 based hetero-dielectric FET transistor (adding with high-K dielectric materials along with HfO2 material) is also simulated. It is observed from the analyses that hetero-dielectric structures will have high conductivity compared to conventional MoTe2 based FET transistors. The performance of the MoTe2 based FET was also compared to that of other 2D materials, such as MoS2 and WSe2, by employing them as channel materials. It is observed from simulation that, the Ion/Ioff current ratio of MoS2,WSe2 and MoTe2 as 2.25e9, 8.11e8 and 4.93e7. Based on these results and material properties, it is understood these materials can be employed for a variety of purposes due to their distinct features. For example, the direct bandgap and increased electron mobility of MoS2 material make it suited for optoelectronic applications and high-speed electrical devices. MoTe2 materials with variable bandgap and anisotropic conductivity, on the other hand, are appealing for flexible electronics, wearable devices, and devices needing directional charge transport. As a result of their great compatibility, researchers can investigate hybrid structures and heterostructures to affect the collaborative effects of combining these different 2D materials, leading to innovative functions and improved device performance. Lastly, the proposed heterodielectric device was designed for dry protein dielectric biomolecules as dielectric material to analyze the device’s sensitivity performance. It is observed that Variations in dielectric constant affect the sensitivity of biosensor devices at different channel lengths.