研究目的
To develop efficient CsPbI3 perovskite solar cells (PSCs) through guanidine hydrobromide (GABr) post-treatment on the surface of CsPbI3 film to reduce energy loss and optimize band alignment.
研究成果
GABr post-treatment on CsPbI3 film effectively reduces nonradiative recombination and optimizes band alignment, leading to enhanced PSC performance with a PCE of 18.02%. This approach could also benefit other types of PSCs.
研究不足
The study is limited by the potential accumulation of GA+ on the surface of CsPbI3 film at high GABr concentrations, which hinders carrier transport and affects contact with PTAA film.
1：Experimental Design and Method Selection:
The study involved post-treatment of CsPbI3 films with GABr to enhance PSC performance.
2：Sample Selection and Data Sources:
CsPbI3 films were treated with different concentrations of GABr (0, 1, 2, 3, 4 mg/mL).
3：List of Experimental Equipment and Materials:
Fluorine-doped tin oxide (FTO) glass, TiO2, GABr, CsPbI3, PTAA, Au.
4：Experimental Procedures and Operational Workflow:
Fabrication of PSCs with structure FTO/TiO2/GABr treated CsPbI3/PTAA/Au, followed by characterization.
5：Data Analysis Methods:
XRD, SEM, AFM, XPS, FTIR, optical absorption, PL, TRPL, fs-TA, UPS, J-V measurements.
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