研究目的
Investigating the efficiency and stability of inverted perovskite solar cells (PSCs) by incorporating secondary amines into the perovskite structure.
研究成果
The introduction of the secondary amine molecule DMA into the perovskite structure resulted in improved crystal rigidity, lower defect density, and increased hydrophobicity, leading to a record power conversion efficiency of 21.6% for inverted PSCs and significantly enhanced operational stability. This advancement is relevant to the development of silicon:perovskite tandem solar cells.
研究不足
The study focuses on the specific architecture of inverted perovskite solar cells and the incorporation of secondary amines, which may not be directly applicable to other types of solar cells or materials. The long-term stability and scalability of the proposed method under various environmental conditions remain to be fully explored.
1：Experimental Design and Method Selection:
The study involved molecular dynamic simulations of the lattice dynamics of MAPbI3 perovskite on a NiO surface and the introduction of dimethylamine (DMA) to partially replace methylamine (MA) in the perovskite structure.
2：Sample Selection and Data Sources:
MA1?xDMAxPbI3 perovskite films were prepared via a one-step spin-coating method with varying ratios of DMA:MA in the precursor solution.
3：List of Experimental Equipment and Materials:
Materials included lead iodide (PbI2), BCP, DMSO, DMF, IPA, CB, choline chloride, MAI, C60, and DMAI. Equipment included a Keithley 2400 Source Meter, solar simulator, Bruker D8 Advance X-ray diffractometer, JSM-7800F field-emission scanning electron microscope, Cary Series UV–vis–NIR Spectrophotometer, HORIBA FL-3000/RM4-3000 spectrophotometer, Thermo Fisher ESCALAB 250XL, Horiba Fluorolog-3 Time-Correlated Single Photon Counting System, Bruker Avance 500 MHz spectrometer, and Asylum Research MFP-3D AFM.
4：Experimental Procedures and Operational Workflow:
The perovskite layers were fabricated using a one-step spin-coating procedure, followed by annealing and the application of passivation and contact layers.
5：Data Analysis Methods:
The study used DFT calculations, AIMD simulations, UV–vis absorption spectra, PL spectra, TRPL decay measurements, and ESM experiments to analyze the properties of the films and devices.
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Keithley 2400 Source Meter
2400
Keithley
Used for measuring the J–V characteristics of the photovoltaic cells.
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Bruker D8 Advance X-ray diffractometer
D8 Advance
Bruker
Used for XRD measurements of the perovskite films.
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JSM-7800F field-emission scanning electron microscope
JSM-7800F
JEOL
Used for obtaining SEM images of the solar cells.
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Cary Series UV–vis–NIR Spectrophotometer
Cary 5000
Agilent
Used for obtaining UV–vis absorption spectra of the perovskite films.
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HORIBA FL-3000/RM4-3000 spectrophotometer
FL-3000/RM4-3000
HORIBA
Used for obtaining PL spectra of the perovskite films.
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Thermo Fisher ESCALAB 250XL
ESCALAB 250XL
Thermo Fisher
Used for UPS measurements.
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Horiba Fluorolog-3 Time-Correlated Single Photon Counting System
Fluorolog-3
HORIBA
Used for TRPL decay measurements.
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Bruker Avance 500 MHz spectrometer
Avance 500 MHz
Bruker
Used for NMR measurements.
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Lead iodide
PbI2
TCI
Used in the preparation of perovskite films.
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BCP
TCI
Used as a material in the fabrication of solar cells.
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DMSO
Sigma Aldrich
Used as a solvent in the preparation of perovskite precursor solutions.
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DMF
Sigma Aldrich
Used as a solvent in the preparation of perovskite precursor solutions.
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IPA
Sigma Aldrich
Used as a solvent in the preparation of perovskite precursor solutions.
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CB
Sigma Aldrich
Used as a solvent in the preparation of perovskite precursor solutions.
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Choline chloride
Sigma Aldrich
Used as a passivation layer in the fabrication of solar cells.
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MAI
Shanghai MaterWin New Materials Technology Co., Ltd.
Used in the preparation of perovskite films.
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C60
Xi’an Polymer Light Technology Cory
Used as an n-type contact layer in the fabrication of solar cells.
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DMAI
Macklin
Used in the preparation of perovskite films.
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Solar simulator
SS-F5-3A
Enli Tech
Used to simulate AM 1.5G illumination for testing solar cells.
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Asylum Research MFP-3D AFM
MFP-3D
Asylum Research
Used for ESM experiments.
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