1：Experimental Design and Method Selection:

A two-step process was used, starting with electrodeposition of a Cu/Zn metallic stack precursor on a Mo-coated glass substrate, followed by reactive annealing in a Se + Sn atmosphere under controlled partial pressures and temperatures. The design aimed to study the impact of process parameters on film properties.

2：Sample Selection and Data Sources:

Samples were prepared with varying SnSex partial pressures and annealing temperatures as specified in Table 1 (e.g., A1, A2, A3, a1, a2, a3). Data were collected from morphological, structural, and elemental analyses.

3：3). Data were collected from morphological, structural, and elemental analyses. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included a two-electrode electrodeposition system, a laboratory-made furnace for annealing, X-ray diffractometer (Philips X-pert Pro), Raman spectroscope (Renishaw Invia), X-ray fluorescent spectrometer (Magix PW2403), scanning electron microscope (JEOL JSM-6700), and a solar simulator for J-V measurements. Materials included CuSO4·5H2O, H2SO4, zinc vitriol, methane sulfuric acid, soda-lime glass, Mo, Sn, Se, CdS, ZnO, Al-ZnO, Ni, Al.

4：Experimental Procedures and Operational Workflow:

Electrodeposition of Cu and Zn layers at specific current densities and times, pre-annealing at 300°C, followed by selenization with controlled Sn and Se temperatures and total pressures. Characterization involved XRD, Raman, EDS, SEM, and solar cell fabrication with CdS deposition, sputtering of ZnO layers, and metal grid evaporation.

5：Data Analysis Methods:

Data were analyzed using Lorenzian fitting for Raman spectra, line scanning EDS for elemental distribution, and standard techniques for XRD and SEM image interpretation. Statistical analysis was not explicitly mentioned.