研究目的
To fabricate solar cells where the n-type semiconductor is the n-type silicon and the p-type semiconductor is the SWCNTs, and then add molybdenum disul?de as an n-type semiconductor to the SWCNT/Si based solar cells to improve the devices’ e?ciency.
研究成果
The addition of MoS2 flakes improves the performance of SWCNT/Si heterojunction solar cells, with the best performance observed in cells where a MoS2 layer is deposited first followed by a SWCNT layer. The improvement is attributed to significant increases in fill factor, caused by the hole transport capabilities of the n-type MoS2 flakes.
研究不足
The study does not address the long-term stability of the solar cells under operational conditions. The variability in device performance due to the random dispersion of MoS2 flakes through the SWCNT film is noted as a limitation.
1：Experimental Design and Method Selection:
The study explores two structures for solar cells: one where SWCNTs and MoS2 flakes are mixed to make a hybrid film, and another where a two-layer system is used with MoS2 deposited first followed by SWCNTs.
2：Sample Selection and Data Sources:
The study uses few layer molybdenum disul?de colloidal suspensions and SWCNT suspensions prepared with specific methods.
3：List of Experimental Equipment and Materials:
Includes a Bruker Multimode 8 AFM with Nanoscope V controller, an Inspect FEI F50 SEM, and various chemicals like Triton X-100, Milli-Q water, and gallium-indium eutectic.
4：Experimental Procedures and Operational Workflow:
The preparation of films for both characterization and solar cell production was done using vacuum filtration. Solar cells were prepared with different structures and underwent a series of chemical treatments to improve efficiency.
5：Data Analysis Methods:
The efficiency of the solar cells was examined using an Oreil solar simulator, and the data was processed using a custom program written in LabView, connected to a Keithley data acquisition unit.
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