研究目的
To investigate the use of polyimide (PI) and polyamic acid (PAA) as additives in perovskite solar cells (PSCs) to enhance their performance and stability.
研究成果
The addition of PAA and PI as additives in PSCs significantly enhances the device performance and stability. The optimal concentration of PAA (0.0497 mg/ml) resulted in the highest PCE of 17.85% and maintained efficiency after storage in an Ar-filled glovebox for over 500 hours. The study demonstrates the potential of PAA and PI as promising additives for high-performance and stable PSCs.
研究不足
The study focuses on the use of PAA and PI as additives in PSCs and their effects on device performance and stability. However, the long-term stability under real-world operating conditions and the scalability of the fabrication process are not extensively explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of PAA and PI polymers and their use as additives in PSCs. The interactions between these polymers and perovskite (PVSK) were analyzed using X-ray photoelectron spectroscopy, UV–visible spectroscopy, photoluminescence (PL) spectroscopy, and time-resolved PL spectroscopy.
2：Sample Selection and Data Sources:
The PVSK solution was prepared using lead iodide (PbI2) and methyl ammonium iodide in a mixed solvent of DMF and DMSO. PAA or PI was added to the PVSK solution at different concentrations.
3：List of Experimental Equipment and Materials:
The study utilized field emission scanning electron microscopy (FE-SEM) for morphology analysis, atomic force microscopy (AFM) for surface roughness analysis, and a Keithley 2400 programmable source meter for current density–voltage (J–V) characteristics measurement.
4：Experimental Procedures and Operational Workflow:
The PVSK solution with or without additives was spin-coated on NiOx film, followed by thermal annealing to form the active layer. The devices were then completed with additional layers and electrodes.
5：Data Analysis Methods:
The performance of the PSCs was evaluated based on power conversion efficiency (PCE), fill factor (FF), and stability tests under various conditions.
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