研究目的
Investigating the enhancement of photovoltaic performance and stability of MAPbI3 based perovskite solar cells through post-treating the MAPbI3 film with pyrrolidine (Py).
研究成果
The post-treatment of MAPbI3 films with pyrrolidine (Py) enhances both photovoltaic performance and stability of perovskite solar cells. The formation of a 1D PyPbI3 layer atop the 3D MAPbI3 serves as a tunnelling contact to reduce charge recombination and as a robust barrier against environmental degradation. This method achieved a maximum power conversion efficiency of 16.65% and significantly prolonged shelf-life stability.
研究不足
The study is limited by the need for precise control over the thickness of the 1D PyPbI3 layer to optimize charge transport and diminish charge recombination. Additionally, the environmental stability tests were conducted under specific humidity conditions, which may not represent all real-world scenarios.
1：Experimental Design and Method Selection:
The study involved post-treating pre-formed three-dimensional methylammonium lead iodide (3D MAPbI3) films with pyrrolidine (Py) to form one-dimensional pyrrolidinium lead iodide (1D PyPbI3) atop the MAPbI
2：Sample Selection and Data Sources:
MAPbI3 films were prepared using the anti-solvent dripping approach and treated with varying concentrations of Py in chlorobenzene (CB).
3：List of Experimental Equipment and Materials:
Materials included methylammonium iodide (MAI), lead iodide (PbI2), pyrrolidine, chlorobenzene (CB), and Spiro-OMeTAD. Equipment included a field emission scanning electron microscope (JOEL 7001F), UV-visible spectrometer (Cary 60), and X-ray diffraction (Rigaku SmartLab).
4：Experimental Procedures and Operational Workflow:
The MAPbI3 films were treated with Py/CB solutions, dried, and then characterized for structural, optical, and electronic properties. Devices were fabricated and their photovoltaic performances were evaluated.
5：Data Analysis Methods:
XRD patterns were modeled using TOPAS (V5, Bruker) via a Pawley refinement. Device performance was evaluated using a solar simulator and impedance spectra were analyzed to determine charge recombination resistance.
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field emission scanning electron microscope
JOEL 7001F
JOEL
Capture top-planed and cross-sectional images of MAPbI3 film and device.
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UV-visible spectrometer
Cary 60
Agilent
Measure optical absorption spectra of MAPbI3 perovskite films.
Cary 60 UV-Vis Spectrophotometer
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X-ray diffraction
Rigaku SmartLab
Rigaku
Determine crystal structure of the perovskite film deposited on FTO-glass substrate.
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solar simulator
Oriel Sol3A
Newport
Evaluate device performance under simulated sunlight.
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quantum efficiency system
IQE 200B
Newport
Measure incident photon-to-current conversion efficiency (IPCE) under AC mode.
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electrochemical workstation
VSP
BioLogic Science Instruments
Perform impedance spectra of devices under different light intensities illumination.
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