研究目的
Investigating the influence of fullerene (PCBM) on the hysteresis mechanism in planar perovskite solar cells.
研究成果
The introduction of PCBM into the perovskite active layer significantly reduces hysteresis in planar perovskite solar cells by passivating trap states and improving charge transport. This research provides insights into the mechanism of hysteresis and offers a method to enhance the performance of perovskite solar cells.
研究不足
The study focuses on the effects of PCBM on hysteresis in planar perovskite solar cells, but the broader applicability to other device architectures or materials is not explored. The mechanisms underlying the observed effects could be further investigated.
1：Experimental Design and Method Selection:
The study involves the introduction of PCBM into the active layer of planar perovskite solar cells to explore its effects on hysteresis.
2：Sample Selection and Data Sources:
Perovskite precursor solutions with different PCBM weight ratios were prepared.
3：List of Experimental Equipment and Materials:
Fluorine-doped tin oxide (FTO) substrates, titanium diisopropoxide, CH3NH3I, CH3NH3Cl, PbI2, N,N-dimethylformamide, PCBM, chlorobenzene, and other materials for device fabrication.
4：Experimental Procedures and Operational Workflow:
The fabrication of PSCs involved cleaning FTO substrates, depositing a compact TiO2 layer, preparing perovskite and perovskite-PCBM precursor solutions, spin-coating, annealing, and depositing a gold counter electrode.
5：Data Analysis Methods:
Characterization techniques included SEM, XRD, UV-Vis absorption spectroscopy, steady-state and transient photoluminescence spectroscopy, and time-resolved charge extraction.
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Fluorine-doped tin oxide (FTO) substrates
TEC-7
Pilkington
Used as transparent conductive substrates for the fabrication of perovskite solar cells.
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Titanium diisopropoxide
Used to deposit a compact TiO2 layer on FTO substrates.
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CH3NH3I
Used in the preparation of perovskite precursor solution.
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CH3NH3Cl
Used in the preparation of perovskite precursor solution.
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PbI2
Sigma-Aldrich
Used in the preparation of perovskite precursor solution.
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N,N-dimethylformamide
Sigma-Aldrich
Used as a solvent in the preparation of perovskite precursor solution.
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PCBM
Introduced into the perovskite active layer to explore its effects on hysteresis.
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Chlorobenzene
Used as a solvent for PCBM and in the preparation of hole transport layer precursor.
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Gold
Used as a counter electrode in the fabrication of perovskite solar cells.
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