研究目的
Investigating the modulation of Ni2+ vacancies in NiOx film by controlling deposition temperature in a hot-casting process to improve the charge carrier transport and photovoltaic performance of perovskite solar cells (PSCs).
研究成果
The modulation of Ni2+ vacancies in NiOx films through deposition temperature control in a hot-casting process significantly improves the electronic structure of NiOx, leading to enhanced charge carrier transport and photovoltaic performance of PSCs. The optimal deposition temperature was found to be 120 °C, resulting in a 36.24% improvement in power conversion efficiency compared to room temperature deposition.
研究不足
The study focuses on the modulation of Ni2+ vacancies in NiOx films and their impact on PSC performance. Potential limitations include the scalability of the hot-casting process and the long-term stability of the devices under operational conditions.
1：Experimental Design and Method Selection:
The study involved modulating the Ni2+ vacancies in NiOx film by controlling the deposition temperature in a hot-casting process. The electronic structure and properties of NiOx films were analyzed through various experimental techniques and theoretical calculations.
2：Sample Selection and Data Sources:
NiOx films were prepared at different deposition temperatures (25, 80, 120, and 150 °C) and characterized. Perovskite solar cells with these NiOx films as HTLs were fabricated and tested.
3：List of Experimental Equipment and Materials:
Materials included nickel acetate tetrahydrate, ethylene glycol, ethanediamine, and others. Equipment included UV-Vis spectroscopy, XPS, UPS, PL and TRPL measurements, and a solar simulator for J-V characteristics.
4：Experimental Procedures and Operational Workflow:
NiOx films were spin-coated on FTO substrates at different temperatures, annealed, and then used to fabricate PSCs. The devices were characterized for their photovoltaic performance and stability.
5：Data Analysis Methods:
Data from various characterizations were analyzed to understand the effect of deposition temperature on the electronic structure of NiOx and the performance of PSCs.
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