Two-dimensional (2D) organic semiconductors, such as fluorinated copper phthalocyanine (F16CuPc), have emerged as promising materials for high-performance nanoelectronics due to their exceptional crystallinity, efficient charge transport, and tunable electronic properties. However, the performance of field-effect transistors based on these materials is often hindered by large Schottky barriers and Fermi level pinning at metal/organic interfaces. This study investigates the impact of introducing 2D metallic 1T-TaSe2 as van der Waals (vdW) contacts on the electrical characteristics of F16CuPc nanoflake-based transistors. By leveraging temperature-dependent transport analysis and Kelvin probe force microscopy (KPFM), it is demonstrated that the 1T-TaSe2/F16CuPc interface exhibits significantly reduced Schottky barrier height and suppressed Fermi level pinning compared to conventional evaporated Au contacts. The resulting lower contact resistance enables more efficient charge injection and enhanced on-state current, with electron mobility increasing from 0.21 cm² V⁻¹ s⁻¹ to 0.28 cm² V⁻¹ s⁻¹ at room temperature. Temperature-dependent measurements reveal that the band-like charge transport regime expands across a broader range of operating conditions, while trap state energy in the multiple trap/release (MTR) model is reduced by up to 16% compared to Au-contacted devices. KPFM analysis confirms a dramatic reduction in potential drop at the contact interface—only 31.9% of the total voltage drop occurs at the 1T-TaSe2/F16CuPc junction, compared to 64.303760-60-3 site 9% in Au-contacted devices—indicating that channel resistance dominates over contact resistance.458-37-7 References These findings highlight the critical role of interface quality in determining device performance. The use of 1T-TaSe2 not only eliminates defect-induced gap states but also protects the organic semiconductor from thermal damage and metal diffusion during fabrication.PMID:28846268 As a result, the optimized vdW contact structure leads to superior carrier mobility, reduced scattering, and improved stability. This work provides compelling evidence that engineering the electrode/semiconductor interface through 2D metals with appropriate work functions can overcome intrinsic limitations in organic electronics, offering a robust pathway toward high-efficiency, low-power 2D organic devices.MedChemExpress (MCE) offers a wide range of high-quality research chemicals and biochemicals (novel life-science reagents, reference compounds and natural compounds) for scientific use. We have professionally experienced and friendly staff to meet your needs. We are a competent and trustworthy partner for your research and scientific projects.Related websites: https://www.medchemexpress.com
