研究目的
To improve the film crystallinity and crystallographic orientation of 2D Ruddlesden-Popper perovskite films for enhanced efficiency of solar cells without using the anti-solvent method.
研究成果
Vertically aligned, highly crystalline 2D Ruddlesden-Popper perovskite films were successfully grown on mesoporous TiO2 substrates using a simple one-step spin coating method with MACl additive, leading to solar cells with a power conversion efficiency of 9.74%. This method avoids the use of toxic anti-solvents and offers a promising approach for the development of environmentally stable perovskite solar cells.
研究不足
The study focuses on the use of MACl additive for improving the crystallinity and orientation of 2D RP perovskite films, but the optimal amount of MACl and its effects on film morphology and device performance need further investigation.
1：Experimental Design and Method Selection:
A simple one-step spin-coating method was used to prepare 2D RP perovskite films with the assistance of MACl additive, avoiding anti-solvent treatment.
2：Sample Selection and Data Sources:
2D perovskite (PEA)2(MA)4Pb5I16 films were prepared with different amounts of MACl additive.
3：List of Experimental Equipment and Materials:
Scanning electron microscopy (SEM), grazing-incidence wide-angle X-ray scattering (GIWAXS), X-ray diffractometer (XRD), ultraviolet–visible (UV–vis) spectrophotometer, steady-state fluorescence spectrometer, digital source meter.
4：Experimental Procedures and Operational Workflow:
The films were prepared by spin-coating the precursor solution on mesoporous TiO2 substrates, followed by annealing. The photovoltaic performance was measured under standard AM 1.5 illumination.
5：5 illumination.
Data Analysis Methods:
5. Data Analysis Methods: The crystallinity and orientation of the films were analyzed using XRD and GIWAXS. The photovoltaic performance was evaluated through current–voltage (J-V) characteristics and incident photon conversion efficiency (IPCE) measurements.
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