1：Experimental Design and Method Selection:

The study involved the comparison of binary and ternary planar heterojunction OPVCs with different configurations (5T/C60, 5T/SubPc, and 5T/SubPc/C60). The effect of organic layer thicknesses on device performances was studied, and a morphological study was conducted to understand the behavior of different OPVC configurations.

2：0). The effect of organic layer thicknesses on device performances was studied, and a morphological study was conducted to understand the behavior of different OPVC configurations. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: The active molecules SubPc, C60, and also AlQ3, CuI, and MoO3, which were used as buffer layers in the OPVCs, were provided by CODEX-International (France) while 5T was synthesized in the Chilean laboratory involved in this work.

3：List of Experimental Equipment and Materials:

The organic active layers were sandwiched between two electrodes, an Al cathode and a transparent ITO anode. Electron and hole buffer layers were inserted between the electrodes and the organic active layer. All layers were deposited in a vacuum of 10^-4 Pa.

4：Experimental Procedures and Operational Workflow:

After cleaning, the ITO-coated glass substrates were loaded into a vacuum chamber. The organic active layers were deposited by sublimation, and the aluminum top electrodes were thermally evaporated through a mask with 2 mm × 8 mm active areas.

5：Data Analysis Methods:

Electrical characterizations were performed with an automated I–V tester, in the dark and under sun global AM 1.5 simulated solar illumination. Performances of photovoltaic cells were measured using a calibrated solar simulator at 100 mW/cm2 light intensity adjusted with a PV reference cell.