研究目的
To introduce a polymerization-assisted grain growth strategy for efficient and stable perovskite solar cells by passivating ionic defects at the surface and grain boundaries.
研究成果
The PAGG strategy significantly improves the performance and stability of perovskite solar cells by reducing defect density at grain boundaries through polymer passivation, achieving a champion PCE of 23.0% and enhanced longevity under operational conditions.
研究不足
The study focuses on the PAGG strategy's effectiveness in improving PCE and stability but does not extensively explore the scalability or cost-effectiveness of the method for commercial production.
1：Experimental Design and Method Selection:
The study employs a polymerization-assisted grain growth (PAGG) strategy in the sequential deposition method for perovskite solar cells. Small monomers are added to the PbI2 precursor, and polymerization is triggered during annealing to form bulkier polymers at grain boundaries.
2：Sample Selection and Data Sources:
Perovskite films are fabricated using a two-step method with PbI2 and organic salts (FAI: MAI: MACl) on ITO/SnO2 substrates.
3：List of Experimental Equipment and Materials:
Materials include dimethylsulfoxide (DMSO), isopropanol (IPA), dimethylformamide (DMF), PbI2, FAI, MAI, MACl, spiro-OMeTAD, and Ag for electrodes. Equipment includes spin-coaters, UV-ozone cleaners, SEM, AFM, XRD, PL spectrometers, and solar simulators.
4：Experimental Procedures and Operational Workflow:
The process involves spin-coating PbI2 with monomers, annealing to trigger polymerization, spin-coating organic salts, annealing to form perovskite, and depositing spiro-OMeTAD and Ag electrodes.
5：Data Analysis Methods:
Performance is evaluated through J-V measurements, IPCE, PL, TRPL, TPV, and TPC decay analyses. Stability is assessed under continuous illumination and ambient conditions.
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