研究目的
Investigating the micro-structural, optical and vibrational spectra analysis of Lead sulphide, Cadmium doped PbS and Strontium doped PbS nano-structured thin films synthesized through Successive Ionic Layer Adsorption and Reaction technique for solar cell and infrared detector sensor applications.
研究成果
The study successfully synthesized PbS, Cd doped PbS, and Sr doped PbS nanostructured thin films using the SILAR technique. XRD results confirmed the tetragonal structure of the films, with average particle sizes ranging from 18 nm to 24 nm. FTIR analysis identified various functional groups, and UV–VIS spectroscopy determined the band gaps, making these materials suitable for IR detection sensors and solar cell applications due to their low cost and good quality.
研究不足
The study is limited by the specific conditions of the SILAR technique used, such as room temperature deposition and atmospheric pressure, which may affect the film properties. The optical and structural properties are analyzed only for the given doping concentrations and may vary with different doping levels.
1：Experimental Design and Method Selection:
The study employed the Successive Ionic Layer Adsorption and Reaction (SILAR) technique for the deposition of PbS, Cd doped PbS, and Sr doped PbS thin films on glass substrates at room temperature.
2：Sample Selection and Data Sources:
Cleaned glass slides were used as substrates. The cationic precursors were Lead nitrate, Cadmium nitrate, and Strontium chloride, with Sodium Sulphide as the anionic precursor.
3：List of Experimental Equipment and Materials:
Field emission scanning electron microscopy (FESEM), X-ray diffraction analysis (Bruker D8 Advanced X-Ray Diffractometer), FTIR vibrational spectra (FTIR spectrometer Perkin Elmer GX), and UV–VIS spectroscopic (Perkin-Elmer Lambda 2 spectrometer) were used.
4：Experimental Procedures and Operational Workflow:
The substrates were cleaned, and the thin films were deposited using the SILAR technique with specific dipping, rinsing, and drying times. The films were then calcinated at 120°C.
5：Data Analysis Methods:
The crystalline nature, particle size, strain, and dislocation density were analyzed using XRD data. Optical properties were studied using UV–VIS spectroscopy and Tauc plots.
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