1：Experimental Design and Method Selection:

The Cu-Zn-S nanocomposite films were deposited using a SILAR method at room temperature. The methodology includes the preparation of cationic and anionic precursors, and the deposition process involves cycles of immersion in these precursors followed by rinsing.

2：Sample Selection and Data Sources:

Glass substrates and CdTe device stacks were used. The glass substrates were cleaned using Micro-90 detergent and rinsed with deionized water, acetone, methanol, and 2-propanol.

3：List of Experimental Equipment and Materials:

A dip-coater was employed for SILAR deposition. Characterization was performed using Hitachi S-4800 SEM, EDS, UV-Vis-NIR spectrophotometer, Rigaku Ultima III X-ray diffractometer, 4-point probe for sheet resistance, and Dektak profilometer for thickness measurement.

4：Experimental Procedures and Operational Workflow:

The deposition process involved cycles of immersion in cationic and anionic precursors, followed by rinsing. The CdTe devices were treated with CdCl2, and Cu-Zn-S films were deposited on CdTe using the SILAR method before completing the back contact with Au.

5：Data Analysis Methods:

The optical properties were analyzed using transmission and reflection spectra. The band gap was estimated by plotting (αhν)2 vs (hν). The back-barrier height was obtained using thermionic emission model.