研究目的
To address the large Voc loss and poor moisture stability issues in CsPbI2Br inorganic perovskite solar cells (IPSCs) through a dual-protection strategy involving bulk additive TMTA and surface capping with Th-NI.
研究成果
The dual-protection strategy significantly improves the efficiency and stability of CsPbI2Br IPSCs, achieving a champion efficiency of 15.58% and maintaining 83.4% of initial efficiency after 1540 h at 25% RH. The strategy offers a promising path toward commercialization of efficient and stable IPSCs.
研究不足
The study focuses on CsPbI2Br IPSCs and may not directly apply to other perovskite compositions. The long-term stability under varying environmental conditions beyond the tested parameters remains to be explored.
1：Experimental Design and Method Selection:
The study employs a dual-protection strategy combining bulk additive TMTA for growth control and GBs passivation, and surface capping with Th-NI for surface recombination suppression and moisture resistance.
2：Sample Selection and Data Sources:
CsPbI2Br films are fabricated with a two-step annealing process.
3：List of Experimental Equipment and Materials:
Includes TMTA, Th-NI, CsPbI2Br, and standard solar cell fabrication materials.
4：Experimental Procedures and Operational Workflow:
Films are fabricated with LTA and HTA processes, followed by Th-NI surface treatment. Devices are characterized for performance and stability.
5：Data Analysis Methods:
Includes XRD, SEM, FTIR, XPS, PL, TRPL, SCLC, J-V, EQE, and stability tests.
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