1：Experimental Design and Method Selection:

A spray pyrolysis method using a perfume atomizer was employed to deposit undoped and Nd-doped CdO thin films on glass substrates. The method was chosen for its simplicity and ability to modify film properties by varying parameters.

2：Sample Selection and Data Sources:

Thin films were prepared with different Nd doping concentrations (0, 1, 3, and 5 wt%) using cadmium acetate and neodymium dopant in deionized water. Glass substrates were pre-cleaned.

3：List of Experimental Equipment and Materials:

Perfume atomizer, magnetic stirrer, temperature controller, thermocouple, X-ray diffractometer (PANalytical X’Pert PRO), micro-Raman spectrometer (LABRAM-HR), FTIR spectrometer (Bruker system), SEM (Hitachi S-3000H), UV-Vis-NIR spectrometer (Perkin Elmer Lambda 35), PL spectrometer (Horiba Jobin Yvon), Hall effect measurement setup, semiconductor parameter analyzer (Keithley 4200), halogen lamp for photoexcitation.

4：Experimental Procedures and Operational Workflow:

Precursor solution preparation with stirring, substrate cleaning, deposition at controlled parameters (substrate temperature 350°C, spray time 10 s, interval 20 s, distance 30 cm, angle 45°), cooling to room temperature. Characterization using XRD, Raman, FTIR, SEM, EDX, UV-Vis-NIR, PL, Hall effect, and photoconductivity measurements.

5：Data Analysis Methods:

XRD data analyzed for crystallite size using Scherrer's formula, dislocation density, microstrain; optical data for band gap using Tauc plot; electrical data for resistivity, carrier concentration, mobility; photoconductivity data for ideality factor and responsivity.