研究目的
Investigating the stabilization of the black α-phase of CsPbI3 at low temperatures using ytterbium (III) chloride (YbCl3) as a bifunctional additive to improve the photovoltaic performance of inorganic perovskite solar cells.
研究成果
The introduction of YbCl3 as a bifunctional additive in the perovskite precursor effectively stabilizes the black α-phase of CsPbI3 at low temperatures, reduces trap density, and enhances the photovoltaic performance and stability of inorganic perovskite solar cells. This additive engineering strategy offers a simple and promising approach to improving the performance of inorganic PSCs.
研究不足
The study focuses on the stabilization of the α-phase of CsPbI3 at low temperatures using YbCl3 as an additive. The research does not explore the long-term stability under operational conditions or the scalability of the fabrication process for commercial applications.
1：Experimental Design and Method Selection:
The study introduces YbCl3 into the perovskite precursor to stabilize the black α-phase of CsPbI3 at low temperatures. The methodology includes the preparation of perovskite precursor solutions with different YbCl3 molar ratios, spin-coating on FTO substrates, and heat treatment at various temperatures.
2：Sample Selection and Data Sources:
Perovskite precursor solutions with different YbCl3 molar ratios were prepared and characterized using XRD, UV-vis absorption spectra, SEM, FT-IR, XPS, and SCLC measurements.
3：List of Experimental Equipment and Materials:
Materials include PbI2, CsI, YbCl3, DMF, DMSO, Spiro-OMeTAD, and others. Equipment includes X-ray diffractometer, Fourier infrared spectrometer, field-emission SEM, UV–vis spectrophotometer, and electrochemical workstation.
4：Experimental Procedures and Operational Workflow:
The perovskite precursor was spin-coated onto FTO/TiO2 substrates, followed by annealing at different temperatures. The Spiro-OMeTAD solution was then spin-coated onto the perovskite film, and Ag was deposited by thermal evaporation.
5：Data Analysis Methods:
The study analyzed the perovskite films' structural, optical, and electronic properties using various characterization techniques and evaluated the photovoltaic performance of the devices.
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