1：Experimental Design and Method Selection:

The study involved selecting different polymers (PTB7, PBDB-T, and PBDB-T-2F) as donor materials with INTIC as the acceptor to fabricate organic solar cells with the same structure to optimize their photovoltaic performance.

2：Sample Selection and Data Sources:

The small-molecule acceptor INTIC was synthesized in this work, and donor materials PTB7, PTB7-Th, PBDB-T, and PBDB-T-2F were purchased from commercial sources.

3：List of Experimental Equipment and Materials:

The zinc oxide precursor solution was prepared from zinc acetate dihydrate, ethanolamine, and 2-methoxyethanol. The UV-Vis absorption spectra were acquired on a Shimadzu UV-3101 PC spectrometer. The surface morphology characteristics were measured by atomic force measurement (AFM, PSIA XE-100).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Organic solar cells were fabricated in an inverted architecture of ITO/ZnO/Active Layer/MoO3/Ag. The active layers were spin-coated from solutions of donor and acceptor in chloroform with 1% 1-chloronaphthalene as an additive.

5：Data Analysis Methods:

The photovoltaic performance parameters of fabricated solar cells were analyzed, including VOC, JSC, FF, and PCE. The carrier transport in the active layers was explored by the method of space limiting current (SCLC).