研究目的
Investigating the dual function of LiYF4:Er3+/Yb3+ as upconverter and light scattering material in dye sensitized solar cells (DSSCs) for improved performance.
研究成果
The dual function LiYF4:Er3+/Yb3+ as upconverter and light scattering material significantly enhances the performance of DSSCs, achieving a record PCE of 10.53%. This approach effectively utilizes NIR light through upconversion and broadens the absorption spectrum via dye cosensitization.
研究不足
The study focuses on the application of LiYF4:Er3+/Yb3+ in DSSCs, with potential limitations in scalability and cost-effectiveness of the synthesis process. The performance under varying environmental conditions was not explored.
1：Experimental Design and Method Selection:
The study employed a hydrothermal method for synthesizing LiYF4:Er3+/Yb3+ powders, followed by spin coating onto photoelectrodes. The photoelectrodes were then cosensitized with N719 and squaraine SPSQ2 dyes.
2：Sample Selection and Data Sources:
The materials used included Y(NO3)3·5H2O, Er(NO3)3·6H2O, Yb(NO3)3·5H2O, LiOH, NH4F, and oleic acid.
3：List of Experimental Equipment and Materials:
Equipment included a powder X-ray diffractometer, scanning electron microscope, UV?Vis?NIR spectrophotometer, and solar simulator.
4：Experimental Procedures and Operational Workflow:
The synthesis involved mixing chemicals, hydrothermal treatment, centrifugation, and drying. Photoelectrodes were prepared by coating FTO glass with TiO2, followed by UC layer deposition and dye sensitization.
5：Data Analysis Methods:
The performance of DSSCs was evaluated through J?V characteristics, IPCE measurements, and EIS analysis.
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