1：Experimental Design and Method Selection:

The study uses an antisolvent-assisted collision technique (ACT) for synthesizing MASnI3 perovskite under ambient conditions, followed by spray coating and mechanical pressing for film fabrication. Piezoelectric nanogenerators (PENGs) are fabricated with MASnI3 and PVDF-MASnI3 composites, and their properties are characterized using various analytical techniques.

2：Sample Selection and Data Sources:

Samples include MASnI3 powder and films, PVDF films, and composite films. Data are sourced from synthesized materials and measurements under controlled conditions.

3：List of Experimental Equipment and Materials:

Equipment includes X-ray diffractometer (XRD, Rigaku D/MAX-RC), scanning electron microscope (SEM, TOPCON DS-130C), transmission electron microscope (HRTEM), impedance analyzer (HP4194A), ferroelectric tester (RT 66A), atomic force microscope (MFP-3D Origin, Asylum Research), load cell (dacel UU-K20), current amplifier (SR 570, Stanford Research System), oscilloscope (DSO1024A, Agilent Technologies), and airbrush (GP Series GP-1, Fuso Seiki Co., Ltd.). Materials include SnI2, HI, methyl amine, PVDF, DMF, toluene, THF, diethyl ether, Au, Ti, PI substrate, ITO-PET substrate, PDMS, and silver paste.

4：Experimental Procedures and Operational Workflow:

MASnI3 is synthesized via ACT, films are deposited by spray coating, annealed, and mechanically pressed. PENGs are fabricated by sandwiching active layers between electrodes, poling with electric fields, and encapsulating with PDMS. Measurements involve applying mechanical force and recording electrical outputs.

5：Data Analysis Methods:

Data are analyzed using XRD for structure, SEM for morphology, electrical measurements for dielectric and piezoelectric properties, and statistical methods for output performance evaluation.