研究目的
To reduce the toxicity of Pb based perovskite device by developing a compact perovskite thin film with a higher doping ratio of Ba and improving the morphology and photovoltaic properties of the device.
研究成果
The introduction of PEG as a polymer additive significantly improves the morphology of lead-reduced perovskite films, leading to enhanced device performance with a PCE of 16.1% and excellent stability. This study provides an effective strategy for fabricating high-performance lead-reduced PSCs.
研究不足
The replacement amount of Pb2+ by Ba2+ is still limited, and excessive replacement may result in unstable perovskite structure and poor morphology. The use of certain polymer additives can lead to precipitates that hinder charge transportation.
1：Experimental Design and Method Selection:
The study focuses on partially substituting Pb2+ with Ba2+ in MA/FA mixed-cation perovskite and introducing various polymer additives to improve surface morphology.
2：Sample Selection and Data Sources:
The samples include perovskite films with various concentrations of Ba doping and polymer additives.
3：List of Experimental Equipment and Materials:
Includes FE-SEM, AFM, UV-vis spectrometer, PL and TRPL spectrometers, XRD, and EDS for characterization.
4：Experimental Procedures and Operational Workflow:
The synthesis of mesoporous zinc-doped TiO2 paste, preparation of perovskite precursor solutions, fabrication of PSCs, and characterization of materials and devices.
5：Data Analysis Methods:
The crystallite sizes were calculated by Scherrer equation, and the photovoltaic performance was measured by J-V curves.
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