研究目的
To demonstrate polydimethylsiloxane (PDMS) as an ideal polymeric interlayer which prevents the interfacial degradation, and improves both photovoltaic performance and stability of CuSCN-based perovskite solar cell (PSC) by its crosslinking behavior.
研究成果
The PDMS crosslinking interlayer significantly improves the photovoltaic performance and stability of CuSCN-based perovskite solar cells, achieving power-conversion efficiency over 19% and maintaining over 90% of initial efficiencies under harsh conditions. This study highlights the importance of interfacial modification and defect passivation in enhancing the performance and durability of perovskite solar cells.
研究不足
The study does not extensively explore the long-term stability beyond 1000 hours under ambient conditions and 500 hours under 85°C/85% relative humidity. Additionally, the scalability of the PDMS interlayer deposition process for large-area solar cells is not discussed.
1：Experimental Design and Method Selection
The study involves the fabrication of perovskite solar cells with and without PDMS interlayer to compare their performance and stability. The PDMS interlayer is introduced between the perovskite and CuSCN layers to prevent interfacial degradation and improve hole-transporting properties.
2：Sample Selection and Data Sources
Samples include ITO/SnO2/perovskite, ITO/SnO2/perovskite/PDMS, and ITO/SnO2/perovskite/PDMS/CuSCN structures. Data sources include UV/Vis spectroscopy, x-ray diffractometer, field-emission scanning electron microscope, Raman spectroscopy, and time-of-flight secondary-ion mass spectroscopy.
3：List of Experimental Equipment and Materials
Equipment includes UV/Vis spectroscopy (V-770; JASCO), x-ray diffractometer (New D-8 Advance; Bruker), field-emission scanning electron microscope (Merlin Compact; Zeiss), and Raman spectroscopy (LabRAM HV Evolution, Horiba). Materials include PDMS (Sigma Aldrich), CuSCN (Sigma Aldrich), and various solvents.
4：Experimental Procedures and Operational Workflow
The procedure involves the fabrication of devices with and without PDMS interlayer, followed by characterization using various spectroscopic and microscopic techniques to analyze the effects of PDMS on device performance and stability.
5：Data Analysis Methods
Data analysis includes fitting PL decay curves to biexponential functions, impedance analysis for trap distribution, and J-V characteristics for photovoltaic performance.
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