研究目的
To address the poor chemical stability at the ZnO/perovskite interface and achieve highly efficient and stable perovskite solar cells (PSCs) by optimizing the ZnO/perovskite interface with a low-temperature aqueous solution-processed TiOx passivation layer.
研究成果
The low-temperature aqueous solution-processed ZnO/TiOx bilayer ETL significantly improves the stability and efficiency of PSCs by passivating the ZnO surface and reducing charge recombination at the interface. A PCE of 19.34% was achieved, demonstrating the potential for scalable and flexible perovskite photovoltaic technology.
研究不足
The study focuses on the interface stability and charge recombination reduction at the ZnO/perovskite interface but does not extensively explore the long-term operational stability under continuous illumination or the scalability of the fabrication process for industrial applications.
1：Experimental Design and Method Selection:
The study employed a low-temperature aqueous solution-processed ZnO/TiOx bilayer as the electron transport layer (ETL) in PSCs to enhance interface stability and reduce charge recombination.
2：Sample Selection and Data Sources:
Perovskite films were deposited on ZnO and ZnO/TiOx ETLs annealed at different temperatures (150, 200, 250 °C) to study the effect of annealing temperature on film quality and device performance.
3：List of Experimental Equipment and Materials:
Instruments included XRD for structural analysis, AFM for surface morphology, UPS for energy level determination, XPS for surface chemistry, SEM for film morphology, PL and TR-PL for charge transfer analysis, and J-V measurements for photovoltaic performance.
4：Experimental Procedures and Operational Workflow:
ZnO films were prepared from zinc-amine complex aqueous solution, followed by TiOx passivation. Perovskite layers were then deposited, and devices were fabricated with a configuration of ITO/ZnO-TiOx/PC61BM/MA1-yFAyPbI3-xClx/spiro-OMeTAD/Ag.
5：Data Analysis Methods:
Data were analyzed using statistical techniques for device performance parameters and software tools for spectral and morphological analysis.
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