研究目的
Investigating the impact of 4-Diaminomethylbenzoic (4-DA) passivation strategy on the performance and stability of inverted perovskite solar cells (PSCs).
研究成果
The passivation strategy using 4-DA and thermal annealing treatment significantly improves the performance and stability of inverted PSCs. The method effectively reduces trap states at the grain boundaries and surfaces of perovskite films, leading to a high PCE of 20.58% and enhanced device stability.
研究不足
The study focuses on the passivation of GBs and surface defects in MAPbI3 films using 4-DA and thermal annealing. The limitations include the specific focus on inverted PSCs and the use of a particular passivation material (4-DA).
1：Experimental Design and Method Selection:
The study employs a passivation strategy using 4-DA followed by thermal annealing treatment to improve the performance of PSCs. The impact of 4-DA on the physical properties of perovskite layer and corresponding performance of the inverted PSCs is systematically investigated.
2：Sample Selection and Data Sources:
The study uses MAPbI3 films prepared on ITO/PTAA substrates. The films are treated with 4-DA solution and then annealed.
3：List of Experimental Equipment and Materials:
Materials include Poly [bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA), Lead iodide (PbI2), methylammonium (MAI), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), Fullerene derivative [6, 6]-phenyl C61-butyric acid methy ester (PC61BM), and 4-Diaminomethylbenzoic (4-DA). Equipment includes SEM, UV-vis spectrophotometer, XRD test instrument, fluorescence spectrophotometer, and source meter.
4：Experimental Procedures and Operational Workflow:
The perovskite films are prepared using a two-step method, followed by 4-DA treatment and thermal annealing. The devices are then fabricated and characterized.
5：Data Analysis Methods:
The study analyzes the J-V curves, IPCE spectra, and stability of the devices to assess the impact of 4-DA passivation.
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