研究目的
To simultaneously control the hydrolysis of NbOx precursor solution and reduce the impurities of NbOx ETLs during low-temperature solution processing under ambient conditions for high performance perovskite solar cells.
研究成果
The introduction of O3 into an ethanol solution of Nb(C2H5O)5 effectively improved the hydrolytic stability of the NbOx precursor solution, leading to highly reproducible, compact, and uniform NbOx films. The O3@NbOx ETL-based PSCs exhibited high PCE of 19.54% and 16.42% on rigid and flexible substrates, respectively, significantly higher than devices based on NbOx ETL without O3 treatment.
研究不足
The study focuses on the low-temperature processing of NbOx ETLs and their application in perovskite solar cells. The limitations include the need for further optimization of the perovskite quality and engineering of the ETL/perovskite interface to alleviate hysteresis.
1：Experimental Design and Method Selection:
Ozone (O3) was used as a strong ligand to stabilize Nb salt solution under ambient conditions. The NbOx precursor solution was treated with O3 to suppress hydrolysis and reduce OH content in the film.
2：Sample Selection and Data Sources:
Fluorine-doped tin oxide (FTO) and ITO/PEN substrates were used. Perovskite Cs
3：05[(FAPbI3)85(MAPbBr3)15]95 was deposited on the ETL substrate. List of Experimental Equipment and Materials:
Ozone generator, spin coater, X-ray diffraction (XRD), field-emission scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), UV-Vis spectrophotometer, Keithley 2450 digital source meter.
4：Experimental Procedures and Operational Workflow:
NbOx solution was synthesized and treated with O
5：The solution was spin-coated onto FTO substrates and annealed at 100 °C. Perovskite was deposited by anti-solvent spin coating method. Data Analysis Methods:
XRD for film characterization, SEM for morphology, XPS and UPS for chemical components and energy levels, UV-Vis for transmittance, LSV for conductivity.
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