研究目的
Investigating the effect of strontium chloride (SrCl2) passivation on the stability and efficiency of perovskite solar cells (PSCs).
研究成果
Surface modification with SrCl2 significantly improves the stability and efficiency of perovskite solar cells, achieving a champion PCE of 21.11% and maintaining over 90% of initial PCE after 1000 h in dry air. This demonstrates the potential of SrCl2 passivation for enhancing perovskite solar cell performance and stability.
研究不足
The study focuses on SrCl2 passivation and its effects on perovskite solar cells, but does not explore other passivation materials or methods. The long-term stability beyond 1000 h and performance under varying environmental conditions were not fully investigated.
1：Experimental Design and Method Selection:
The study involved the use of SrCl2 as a surface passivation intermediary on FA-MA mixed perovskite thin films to suppress non-radiative recombination. The methodology included optimizing the concentration of SrCl2 for enhanced device performance.
2：Sample Selection and Data Sources:
Perovskite films were prepared with and without SrCl2 modification. Data were collected on their crystallinity, carrier transport, morphology, and elemental stoichiometry.
3：List of Experimental Equipment and Materials:
Instruments included SEM for morphology, XRD for crystallinity, UV-Vis for absorption spectra, PL and TRPL for recombination dynamics, EDX and XPS for elemental analysis, and J-V measurements for device performance.
4：Experimental Procedures and Operational Workflow:
Perovskite films were prepared via spin-coating, followed by SrCl2 modification and annealing. Devices were fabricated and characterized under controlled humidity conditions.
5：Data Analysis Methods:
Data were analyzed using bi-exponential fitting for TRPL spectra, and device performance was evaluated based on PCE, Voc, Jsc, and FF.
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