研究目的
Investigating the fabrication of high-quality 2D Dion-Jacobson perovskite films without the need for hot-casting, using methylammonium thiocyanate (MASCN) additive to improve film morphology and device performance.
研究成果
The study successfully demonstrated the fabrication of high-quality 2D DJ perovskite films using MASCN additive without hot-casting, achieving a record PCE of 16.25% for such devices. The films exhibited improved crystallinity, orientation, and stability, offering a promising pathway for the development of efficient and stable perovskite solar cells.
研究不足
The study is limited by the specific conditions required for optimal MASCN addition and the need for further investigation into the long-term stability and scalability of the fabrication process.
1：Experimental Design and Method Selection
The study employed a room-temperature spin-coating method for depositing 2D DJ perovskite films, utilizing MASCN as an additive to optimize film quality. The experimental design focused on varying the amount of MASCN to study its effect on film morphology and device performance.
2：Sample Selection and Data Sources
The samples consisted of (3-AMP)(MA0.75FA0.25)3Pb4I13 perovskite films deposited on PTAA/PFN substrates. Data were collected from photovoltaic device performance measurements, SEM, XRD, GIWAXS, PLQY, and TRPL analyses.
3：List of Experimental Equipment and Materials
Materials included 3-aminomethylpiperidinium dihydroiodide (3AMPI2), methylammonium iodide (MAI), formamidinium iodide (FAI), PbI2, and methylammonium thiocyanate (MASCN). Equipment included a spin-coater, SEM (Quanta 400), XRD (Rigaku D/max-2550PC), and UV-Vis spectrophotometer (Shimadzu UV-2450).
4：Experimental Procedures and Operational Workflow
The perovskite precursor solution was prepared and spin-coated onto substrates, followed by annealing. Devices were completed with the deposition of PCBM, BCP, and Ag electrodes. Characterization included J-V measurements, SEM, XRD, and optical analyses.
5：Data Analysis Methods
Data analysis involved fitting TRPL spectra with a bi-exponential decay function, calculating PLQY, and analyzing J-V curves to determine photovoltaic parameters.
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Phenylethyl-ammonium iodide
PEAI
TCI
Used as a spacer cation in perovskite solar cells
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Methylammonium thiocyanate
MASCN
TCI
Additive to improve perovskite film morphology
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Bathocuproine
BCP
TCI
Used in the electron transport layer
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Poly(bis(4-phenyl)(2,4,6-trimethylphenyl)amine)
PTAA
Xi'an Polymer Light Technology Corporation
Hole transport layer material
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Poly[(9,9-bis(30-(N,N-dimethylamino)propyl)-2,7-uorene)-alt-2,7-(9,9-dioctylfuorene)]
PFN-Br
Solarmer Materials Inc.
Interface layer material
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Poly(3,4-ethylenedioxythiophene):poly-(styrenesulfonate)
PEDOT:PSS
Baytron
Hole transport layer material
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(6,6)-Phenyl-C61-butyric acid methyl ester
PC61BM
American Dye Source
Electron transport layer material
-
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