研究目的
Investigating the fabrication of copper, indium, gallium diselenide (CIGSe) solar cells using a solution-based screen printing approach from oxide precursors on conductive fluorine-doped tin oxide (FTO) substrates to achieve cost-effective and efficient photovoltaic devices.
研究成果
The study demonstrates a robust printing-based method for fabricating CIGSe solar cells with an efficiency of over 6%. The approach offers a cost-effective alternative to vacuum-based processes, with potential for further optimization to enhance device performance by improving the photoabsorber/back contact interface and the chemical composition of the CIGSe phase.
研究不足
The study identifies interface recombination and compositional inhomogeneity within the CIGSe layer as factors limiting device performance. The presence of Ga-O phase inclusions and void defects at the FTO/CIGSe interface are noted as areas for optimization.
1：Experimental Design and Method Selection:
The study leverages oxide precursors for screen printing ink formulation, omitting the reduction step typically required in similar processes. The ink is formulated from commercial oxide nanoparticles and ethyl cellulose solution in terpineol.
2：Sample Selection and Data Sources:
Commercial CuO, In2O3, and Ga2O3 nanoparticles are used as precursors.
3：List of Experimental Equipment and Materials:
Screen printing setup, terpineol, ethyl cellulose, wet bead milling equipment, FTO substrates, selenization furnace.
4：Experimental Procedures and Operational Workflow:
The ink is screen-printed on FTO substrates, calcined at 400 oC, and selenized at 550 oC under 5%H2/Ar flow. A buffer layer of CdS is deposited, followed by sputtering of i-ZnO and ZnO:Al layers to complete the solar cell.
5：Data Analysis Methods:
Characterization includes XRD, Raman spectroscopy, SEM, EDX, UV-Vis-NIR spectroscopy, and photovoltaic performance testing.
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