研究目的
Investigating the preparation and application of a novel Ag-doped glass frit for polycrystalline silicon solar cells to enhance photoelectric conversion efficiency.
研究成果
The Ag-doped glass frit prepared by the sol-gel method exhibits excellent wettability and etching effect on the SiNx layer and the Si substrate, leading to a better photoelectric conversion efficiency of 18.2% for pc-Si solar cells, which is 0.8% higher than those using conventional frit. This improvement is attributed to the formation of denser Ag nanocrystals at the interface of the glass layer, promoting excellent ohmic contact and reducing contact resistance.
研究不足
The study focuses on the preparation and application of Ag-doped glass frit for polycrystalline silicon solar cells, with potential limitations in scalability and cost-effectiveness of the sol-gel method for industrial applications.
1：Experimental Design and Method Selection:
The Ag-doped glass frit was prepared by the sol-gel method. The methodology included mixing TEOS with C2H5OH, adding deionized water, and stirring. Then, solutions of Al(NO3)3 and Zn(NO3)2 were added, followed by Bi(NO3)3, H3BO3, and AgNO3 dissolved in C3H8O
2：The mixture was dried and calcinated to obtain the glass frit powder. Sample Selection and Data Sources:
The materials used included ethyl orthosilicate, ethanol, aluminium nitrate nonahydrate, bismuth nitrate pentahydrate, zinc nitrate hexahydrate, boric acid, glycerol, bismuth trioxide, silica, aluminium oxide, zinc oxide, and silver nitrate.
3：List of Experimental Equipment and Materials:
X-ray diffractometer (XRD, D/Max-3C, Cu Karadiation, Rigaku SmartLab), scanning electron microscopy (SEM, Quanta 400 FEG instrument, Oxford INCA 35 detector, 25 kV), X-ray photoelectron spectroscopy analyzer (XPS, ULVAC-PHI, PHI5000, VersaProbeIII), high-temperature microscope (HM, TA Instruments UB der Waters GmbH, ODP868, S-NO 104014).
4：4). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The glass frit was prepared by mixing the solutions, drying, and calcinating. The glass paste was prepared by mixing the glass frit with an organic carrier. The silver paste was prepared by mixing silver particles, glass frit, and organic carrier, then printed onto a multi-crystalline Si wafer and fired.
5：Data Analysis Methods:
The phase structure was studied by XRD, surface morphology by SEM, elemental and chemical bond composition by XPS, and photoelectric property by EKOI-V Tracer.
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