1：Experimental Design and Method Selection:

The study involved synthesizing PbS quantum dots via hot injection method and embedding them in MAPbI3 perovskite nanowires using a two-step method involving spin-coating and soaking in specific solvents to induce nanowire growth. Characterization methods included UV-Vis spectroscopy, photoluminescence spectroscopy, SEM, TEM, XRD, and EDS for structural and optical analysis. Photodetectors were fabricated and tested using a Keithley source meter for electrical measurements.

2：Sample Selection and Data Sources:

PbS QDs were synthesized with exciton peaks around 950 nm. Nanocomposite films were prepared on various substrates including glass, NiO, PEI, and PET. Data were collected from these fabricated samples.

3：List of Experimental Equipment and Materials:

Materials included PbO, PbI2, OA, ODE, n-octane, DMF, BTA, IPA, TMS, hexane, acetone, toluene, MAI purchased from Aladdin, Aldrich-sigma, Sinopharm, and Solarmer. Equipment included UV-Vis spectrometer (Cary 5000, Aligent), photoluminescence spectrometer (Fluorolog-3, Horiba), SEM (JSM-6010PLUS/LA and JSM-7800F Prime), XRD (D2 Phaser desktop), TEM (FEI Tecnai G2 F20), and source meter (Keithley 2400).

4：0). Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: PbS QDs were synthesized and ligand-exchanged with iodide. For nanowire growth, QDs were dissolved in butylamine with PbI2 and MAI, spin-coated on substrates, soaked in IPA/DMF/MAI solution, and annealed. Films were characterized optically and morphologically. Photodetectors were fabricated with gold contacts and tested under illumination at various wavelengths.

5：Data Analysis Methods:

Absorption spectra, XRD patterns, TEM images, and EDS mappings were analyzed to confirm material composition and structure. I-V curves, response times, and responsivity were measured and analyzed to evaluate photodetector performance.