1：Experimental Design and Method Selection:

The study uses a transmission line method (TLM) to measure contact resistance in an AZO/P3HT/AZO structure, with systematic variation of P3HT molecular ordering via sonication (VIA treatment). Theoretical models from Scott and Malliaras are employed to correlate injection current with mobility.

2：Sample Selection and Data Sources:

P3HT solutions in chloroform at concentrations of 2.5 mg/mL and 10 mg/mL are used, with sonication times varied from 5 min to 2 hours. AZO films are sputtered onto Si substrates with a SiO2 gate dielectric layer.

3：5 mg/mL and 10 mg/mL are used, with sonication times varied from 5 min to 2 hours. AZO films are sputtered onto Si substrates with a SiO2 gate dielectric layer. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment includes a sputtering system for AZO deposition, sonicator (200 W), spin coater, photolithography setup, spectrophotometer for optical absorption, grazing incidence X-ray diffractometer (GIXD) for crystallinity, photoelectron spectroscopy in air (PESA) for HOMO/LUMO levels, and field-effect transistor (FET) devices for mobility measurements. Materials include P3HT, chloroform, AZO target (3-wt% Al2O3), photoresist, HCl, acetone, Au/Ti electrodes, and highly Boron-doped silicon.

4：Experimental Procedures and Operational Workflow:

AZO films are sputtered and patterned using photolithography and HCl etching. P3HT films are spin-coated from solutions, with some sonicated for VIA treatment. FET devices are fabricated to measure mobility. TLM is performed by varying channel lengths and measuring current-voltage curves to derive contact and sheet resistances. Optical, structural, and electronic characterizations are conducted using spectrophotometry, GIXD, PESA, and FET measurements.

5：Data Analysis Methods:

Data are analyzed using TLM equations to extract contact and sheet resistances. FET mobility is calculated from transfer characteristic curves. Theoretical predictions relate contact resistance to mobility, and statistical analysis is used to confirm trends with sonication time.