Schematic view of transistor structures
In our latest work, we investigated charge transport in organic semiconductors blended with two-dimensional (2D) Ti₃C₂Tₓ MXene flakes. Ti3C2Tx, the first synthesized and most studied member of the MXene family, is known for its exceptional metallic conductivity, high capacitance, and solution processability. These properties make it a strong candidate for next-generation optoelectronic and energy storage applications. We fabricated a series of thin films by blending Poly(3-hexylthiophene-2,5-diyl) (P3HT), a widely used organic semiconductor, with Ti₃C₂Tₓ flakes at various concentrations. Charge carrier transport was characterized using the time-of-flight photoconductivity (TOFP) method, revealing a remarkable 370% increase in mobility compared to pristine P3HT. To complement these findings, we also fabricated organic field-effect transistors (OFETs) using the same P3HT:MXene blends. The OFETs exhibited a 20% enhancement in field-effect mobility, a more modest gain due to the influence of contact resistance and interface effects inherent to the device geometry—effects that are absent in TOFP measurements. These results demonstrate the potential of MXene-based hybrid systems for improving charge transport in organic electronics. The significant mobility enhancement, particularly in TOFP measurements, underscores the promise of P3HT:MXene composites for high-performance, solution-processable semiconducting materials. The results are published in Material Letters X.