研究目的
Investigating the effects of introducing SnSe and SnS powder during the selenization process on the performance of Cu2ZnSn(S,Se)4 (CZTSSe) thin-film solar cells, focusing on suppressing Sn-loss, increasing the S/(S t Se) ratio, and improving the back contact interface.
研究成果
The introduction of SnS powder during selenization effectively suppresses Sn-loss, increases the S/(S t Se) ratio, and reduces the thickness of the Mo(S,Se)2 layer, leading to improved photovoltaic performance. A CZTSSe solar cell with an efficiency of 10.07% was successfully fabricated, demonstrating the potential of this approach for high-efficiency thin-film solar cells.
研究不足
The study focuses on the effects of SnSe and SnS powder during selenization but does not explore other potential additives or selenization conditions. The VOC deficit remains a challenge for further efficiency improvements.
1：Experimental Design and Method Selection:
The study involves the introduction of SnSe and SnS powder during the selenization process of CZTSSe thin-film solar cells to study their effects on the film and interface properties.
2：Sample Selection and Data Sources:
CZTSSe precursor films were prepared and selenized with Se powder, Se powder and SnSe powder, and Se powder and SnS powder, respectively.
3：List of Experimental Equipment and Materials:
Includes a graphite box for selenization, X-ray diffractometer (Bruker D8 Discover), Raman microscope (Renishaw inVia), scanning electron microscope (ZEISS Gemini 450), and X-ray spectrometer (X-Max 80T).
4：Experimental Procedures and Operational Workflow:
Precursor films were selenized under N2 atmosphere with a two-stage temperature gradient, followed by characterization and device fabrication.
5：Data Analysis Methods:
XRD and Raman spectroscopy for structural analysis, SEM for morphology, EDS for composition, and J-V measurements for photovoltaic performance.
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