研究目的
To study the effect of fluorination on hole transporting materials for the efficient perovskite solar cells.
研究成果
The synthesized BTD-Th and BTD-F-Th molecules showed that fluorinated BTD-F-Th had an increment in UV absorption, HOMO and LUMO values, and perovskite efficiency compared to non-fluorinated BTD-Th.
研究不足
Further optimization is required to improve the efficiency of the synthesized polymer as a HTL in perovskite solar cells. The lower series resistance and poor wettability of the HTL solution over the perovskite active layer may affect the fill factor and overall efficiency.
1：Experimental Design and Method Selection:
Designed and synthesized a novel D-A-D type hole transporting molecule with BTD as electron acceptor unit and Th as electron donor unit.
2：Sample Selection and Data Sources:
Used N-Bromosuccinimide, Triethylamine, Thionyl Chloride, dimethylformamide, and other chemicals from Sigma Aldrich.
3：List of Experimental Equipment and Materials:
Included UV-visible spectrometer (Parkin Elmer Lambda35), Keithley 4200SCS, CH instrument for cyclic voltammetry, and Newport AAA Class solar simulator.
4：Experimental Procedures and Operational Workflow:
Synthesis involved palladium(0) catalyzed Stille coupling reaction, purification by column chromatography, and device fabrication with ITO/SnO2/CH3NH3PbI3/polymerHTL/Ag structure.
5：Data Analysis Methods:
Used Density Functional Theory (DFT) calculations for molecular orbital analysis and cyclic voltammetry for HOMO and LUMO calculations.
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