研究目的
To study the use of low-cost and earth-abundant tin selenide (SnSe) films as counter electrodes in dye-sensitized solar cells (DSSCs) as an alternative to costly platinum counter electrodes.
研究成果
Earth abundant and low cost SnSe could become a promising alternative to platinum counter electrodes in DSSCs. However, methods for the selenium enrichment such as treatment of SnSe films in the selenium environment can be explored in future research to enhance the performance of SnSe-CE and hence to bridge the gap between Pt and SnSe counter electrodes.
研究不足
The efficiency of DSSCs with SnSe counter electrodes (5.76%) is still lower than that with platinum counter electrodes (8.09%). The electrocatalytic activity of SnSe films is much lower than Pt, which accounts for the lower charge transfer resistance between the CE and the electrolyte.
1：Experimental Design and Method Selection:
The study adopted the scalable screen printing process for preparing SnSe films. The SnSe powder was synthesized by solid state reaction method.
2：Sample Selection and Data Sources:
SnSe films of varying thickness were prepared on FTO glass substrates.
3：List of Experimental Equipment and Materials:
X-ray diffraction (Bruker D8 Advance diffractometer), scanning electron microscope (FEI Quanta 3D FEG), Metrohm cyclic voltammetry instrument, solar simulator (Newport), Metrohm Autolab for electrochemical impedance spectroscopy.
4：Experimental Procedures and Operational Workflow:
SnSe films were characterized for their electrocatalytic activity and charge transfer resistance. DSSCs were fabricated using these films as counter electrodes and their performance was evaluated.
5：Data Analysis Methods:
The photovoltaic parameters of the DSSCs were analyzed under AM 1.5G one sun illumination.
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