1：Experimental Design and Method Selection:

The study employed the spray pyrolysis technique for fabricating high-quality Pr:CdS thin films. The methodology included the preparation of solutions by mixing CdCl2 and Thiourea precursors in a 1:2 molar ratio, maintaining the substrates and prepared solutions at a temperature of 310 oC during the spraying process, and allowing the furnace to cool down naturally post-spraying.

2：Sample Selection and Data Sources:

AR grade cadmium chloride (CdCl2), Thiourea (CS(NH2)2), and Praseodymium(III) acetate hydrate (Pr(O2C2H3)3.xH2O) were used as the cadmium, sulfur, and praseodymium sources, respectively, on well-cleaned glass substrates.

3：xH2O) were used as the cadmium, sulfur, and praseodymium sources, respectively, on well-cleaned glass substrates. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: A Japan-manufactured JEOL JSM 7600 F, FE-SEM attached to an Oxford EDX apparatus was used for elemental composition, mapping, and surface morphology studies. A Shimadzu X-6000, XRD and multi-purpose DXR THERMO FISHER SCIENTIFIC FT-RAMAN were employed for structural and vibrational properties. A Shimadzu UV-3600 UV–Vis-NIR spectrophotometer was used for UV-Vis-NIR measurement, and a Lumina fluorescence spectrophotometer from Thermo Fisher Scientific was used for PL spectra.

4：Experimental Procedures and Operational Workflow:

The films were prepared by spraying the solution onto glass substrates maintained at 310 oC. The thickness of all the films was measured by the Alpha-Step D-500 Stylus Profilometer.

5：Data Analysis Methods:

The POWDERX software was employed to investigate the lattice parameters through a refinement process. The Hall-effect at 300 K was measured by employing 10 V beneath the 3700-gauss magnetic field.