研究目的
Investigating the plasmonic effect in Cu2ZnSnS4-Ag nanocomposite thin films fabricated by vacuum thermal co-evaporation to enhance the absorption coefficient in the visible region for solar cell applications.
研究成果
The incorporation of Ag nanoparticles into CZTS thin films enhances the absorption coefficient in the visible region due to surface plasmon resonance. The mixed phase of CZTS and SnS, along with the plasmonic effect, makes these films promising for solar cell applications, potentially increasing efficiency.
研究不足
The study is limited by the formation of secondary phases like SnS and the challenge of achieving single-phase CZTS. The plasmonic effect's enhancement on solar cell efficiency needs further validation.
1：Experimental Design and Method Selection:
CZTS-Ag nanocomposite thin films were fabricated by co-evaporating CZTS and Ag powder using a vacuum thermal co-evaporator. The weight percentage of Ag was varied from 2 to 4%. The films were post-annealed at 500 °C for 1 hour in a vacuum tubular furnace.
2：4%. The films were post-annealed at 500 °C for 1 hour in a vacuum tubular furnace.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: CZTS powder was prepared by solvothermal method, and Ag powder was purchased from Sigma Aldrich. The films were deposited on silicon substrates.
3：List of Experimental Equipment and Materials:
Vacuum thermal co-evaporator, tubular furnace, X-Ray Diffraction (PANalytical, X’Pert PRO), confocal Raman spectroscopy (Renishaw inVia Raman Microscope, UK), UV-Vis Spectrophotometer (Ocean Optics, HR 4000).
4：0).
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The CZTS powder was pressed into pellets, and Ag powder was co-evaporated with CZTS. The films were deposited under high vacuum and then post-annealed. Characterization was done using XRD, Raman spectroscopy, and UV-Vis spectrophotometry.
5：Data Analysis Methods:
The crystallite size was calculated using the Debye-Scherer formula. Optical band gaps were determined from Tauc plots.
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