研究目的
To solve the instability issues of perovskite solar cells (PSCs) by developing a hybrid inorganic electron-transporting layer (ETL) and a halogen-resistant electrode.
研究成果
The study demonstrates that a hybrid C-TiO2 ETL coupled with a halogen-resistant Sb electrode can significantly improve the efficiency and stability of CsPbI2Br-based PSCs. The PSCs achieved a champion PCE of 14.8% and maintained over 90% of their initial efficiency after 1000 hours under thermal and light-soaking conditions. This approach provides a promising solution to the instability issues of PSCs, paving the way for their commercial application.
研究不足
The study focuses on the stability of PSCs under thermal and light-soaking conditions but does not address the stability under humidity or other environmental stressors. The use of Sb electrodes, while effective, may have limitations in terms of cost or scalability compared to other materials.
1：Experimental Design and Method Selection:
The study involves the development of a hybrid C-TiO2 ETL and a halogen-resistant Sb electrode for PSCs. The methodology includes the synthesis of TiO2 nanocrystals, fabrication of the PSC devices, and characterization of their properties and stability.
2：Sample Selection and Data Sources:
The samples include CsPbI2Br-based PSCs with hybrid C-TiO2 ETL and Sb electrodes. Data sources include SEM, AFM, TEM, XRD, FTIR, XPS, UPS, UV–vis, c-AFM, and ToF-SIMS.
3：List of Experimental Equipment and Materials:
Equipment includes SEM, AFM, TEM, XRD, FTIR, XPS, UPS, UV–vis spectrophotometer, c-AFM, and ToF-SIMS. Materials include titaniumn-butoxide, absolute ethanol, oleic acid, niobium(V) ethoxide, chlorobenzene, and Sb.
4：Experimental Procedures and Operational Workflow:
The procedure involves the synthesis of TiO2 nanocrystals, fabrication of PSC devices, annealing of TiO2 films, and thermal evaporation of Sb electrodes. The workflow includes characterization of the films and devices, and stability testing under thermal and light-soaking conditions.
5：Data Analysis Methods:
Data analysis involves the interpretation of SEM, AFM, TEM, XRD, FTIR, XPS, UPS, UV–vis, c-AFM, and ToF-SIMS results to evaluate the morphology, band structure, electronic properties, and stability of the hybrid C-TiO2 ETL and Sb electrodes.
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