1：Experimental Design and Method Selection

The study involved the introduction of TTC at the C60/perovskite interface to reduce interfacial traps, suppress electron recombination, and facilitate electron extraction. The methodology included the fabrication of PVSCs with and without TTC layers to compare their performance and stability.

2：Sample Selection and Data Sources

Perovskite precursor solutions were prepared using specific materials, and devices were fabricated with a structure of ITO/PTAA:F4TCNQ/CH3NH3PbI3/TTC/C60/BCP/Ag. Control devices without TTC were also prepared for comparison.

3：List of Experimental Equipment and Materials

Materials included PbI2, methylammonium iodide (MAI), PTAA, DMF, DMSO, F4-TCNQ, C60, BCP, and Ag. Equipment used included a Keithley 2400 Source Meter, Newport Oriel IPCE measurement kit, ZEISS Sigma FE-SEM, Rigaku Ultima IV diffractometer, and UV-1700 spectrometer.

4：Experimental Procedures and Operational Workflow

The fabrication process involved cleaning ITO substrates, spin-coating PTAA:F4-TCNQ and perovskite layers, depositing TTC and C60 layers by thermal evaporation, and finally evaporating Ag electrodes. Characterization included J-V measurements, IPCE, SEM, XRD, and UV-Vis absorption spectra.

5：Data Analysis Methods

Data analysis involved comparing the photovoltaic parameters (Voc, Jsc, FF, PCE) of devices with and without TTC, analyzing SEM and AFM images for surface morphology, and evaluating TRPL and PL spectra for charge dynamics.