研究目的
Investigating the effect of CsPbBr3 quantum dots on the crystallization and morphology of solution-processed perovskite films for high performance perovskite solar cells.
研究成果
The introduction of CsPbBr3 QDs as heterogeneous nucleation centers significantly improves the crystallinity, morphology, and optoelectronic properties of MAPbI3 films, leading to high-performance PSCs with enhanced efficiency and stability.
研究不足
The study is limited to MAPbI3 perovskite films and does not explore other perovskite compositions. The effect of CsPbBr3 QDs concentration beyond 0.01 mg/mL is not investigated. The stability tests are conducted under controlled humidity and temperature, which may not represent all real-world conditions.
1：Experimental Design and Method Selection:
The study employs CsPbBr3 QDs as an additive in diethyl ether anti-solvent to assist the nucleation and growth of MAPbI3 films. The methodology involves spin-coating perovskite precursor solution on SnO2 substrates followed by anti-solvent dripping during spin-coating.
2：Sample Selection and Data Sources:
MAPbI3 films are prepared with varying concentrations of CsPbBr3 QDs (0,
3：0005, 001, 002, 005, 01 mg/mL) in the anti-solvent. List of Experimental Equipment and Materials:
Includes a spin-coater, hotplate, SEM, TEM, XRD, UV-Vis spectrophotometer, PL spectrometer, and solar simulator for device testing.
4：Experimental Procedures and Operational Workflow:
Perovskite precursor solution is spin-coated on SnO2 substrates, followed by anti-solvent dripping with or without CsPbBr3 QDs, and thermal annealing.
5：Data Analysis Methods:
XRD for crystallinity, SEM for morphology, PL and TRPL for carrier dynamics, and J-V measurements for device performance.
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