研究目的
Investigating the synthesis of high purity Cu2BaSnS4 thin films via a low-cost solution processed method for high efficiency solar cells.
研究成果
High purity Cu2BaSnS4 thin films were successfully synthesized via a low-cost solution-processed method, achieving a solar cell efficiency of 1.99%. The sequential annealing step under sulfur atmosphere was crucial for forming single-phase Cu2BaSnS4. This work provides an efficient pathway for developing high efficiency Cu2BaSnS4 solar cells.
研究不足
The study's limitations include the challenge of forming high purity CBTS phase without secondary phases via solution-processed methods and the need for band gap modification to further improve solar cell efficiency.
1：Experimental Design and Method Selection:
The study employed a solution-processed method to synthesize Cu2BaSnS4 thin films, focusing on controlling the sequential annealing step under chalcogen vapor to achieve high purity.
2：Sample Selection and Data Sources:
The films were prepared on molybdenum-coated sodalime glass (SLG) and characterized using XRD, Raman spectroscopy, SEM, XPS, and EDS.
3：List of Experimental Equipment and Materials:
Instruments included XRD (Bruker D8 Advance), Raman (RENISHAW INVIA), SEM (SIGMA), XPS (PHI Quantera), and EDS. Materials included Cu(CH3COO)2·H2O, SnCl2·2H2O, SC(NH2)2, Ba(CH3COO)2, 2-methoxyethanol, and lactic acid.
4：Experimental Procedures and Operational Workflow:
The process involved dissolving precursors in 2-methoxyethanol, spin-coating on SLG, heating, and annealing under N2 atmosphere with sulfur power source.
5：Data Analysis Methods:
The films' purity and morphology were analyzed through XRD, Raman, SEM, and XPS. Solar cell performance was evaluated via J-V and EQE measurements.
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