研究目的
Investigating the use of volatile solid glycolic acid (GA) in the precursor solution of FA0.85MA0.15PbI3 perovskite to regulate perovskite crystallinity and improve the power conversion efficiency (PCE) and stability of perovskite solar cells (PSCs).
研究成果
The use of volatile solid GA in the perovskite precursor solution effectively regulates perovskite crystallinity, leading to improved film quality, reduced defect density, and enhanced PCE and stability of PSCs. The strategy outperforms the use of nonvolatile TGA, which leaves residues and increases defect density.
研究不足
The study focuses on the use of GA and TGA in FA0.85MA0.15PbI3 perovskite films. The applicability of this strategy to other perovskite compositions and the scalability of the process for commercial production are not addressed.
1：Experimental Design and Method Selection:
The study involves the use of GA in the perovskite precursor solution to regulate crystallinity, compared with a nonvolatile additive TGA. The methodology includes the preparation of perovskite films via spin coating and annealing processes.
2：Sample Selection and Data Sources:
Perovskite films were prepared with and without GA or TGA modification. Data were collected from SEM, AFM, XRD, UV–vis absorption spectra, PL, TRPL, SCLC measurements, and device performance tests.
3：List of Experimental Equipment and Materials:
SEM, AFM, XRD, UV–vis spectrophotometer, PL spectrometer, TRPL setup, SCLC measurement setup, and solar simulator for J–V curve measurements.
4：Experimental Procedures and Operational Workflow:
Perovskite films were prepared by spin coating the precursor solution onto FTO/TiO2 substrates, followed by antisolvent dripping and annealing. The films were characterized by various techniques, and PSC devices were fabricated and tested.
5：Data Analysis Methods:
Data were analyzed using biexponential fitting for TRPL decay spectra, calculation of trap-state density from SCLC measurements, and performance parameters from J–V curves.
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