研究目的
Investigating the use of brookite TiO2 nanoparticles as an electron transport layer in perovskite solar cells with low-temperature processes to enhance power conversion efficiency and reduce hysteresis.
研究成果
The study successfully demonstrated the use of BK TiO2 NPs as an ETL in planar PSCs with low-temperature processes, achieving a high PCE of 15.49% with 40mM TiCl4 treatment. This approach improves the interface between perovskite and ETL, enhancing charge extraction and reducing hysteresis, offering a promising pathway for low-cost PSC production.
研究不足
The study is limited to the use of BK TiO2 NPs and TiCl4 treatment for ETL in PSCs, with a focus on low-temperature processes. The scalability and long-term stability of these devices under operational conditions were not addressed.
1：Experimental Design and Method Selection:
The study focused on using pure-phase, single crystalline brookite TiO2 nanoparticles (BK TiO2 NPs) as an ETL in planar PSCs, followed by TiCl4 treatment with different concentrations (20mM, 40mM, 60mM, and 80mM). The entire fabrication process was conducted at low temperatures (<180 oC).
2：Sample Selection and Data Sources:
FTO-coated glass substrates were used, and perovskite precursors were prepared from commercially available materials. BK TiO2 NPs were synthesized via hydrothermal treatment.
3：List of Experimental Equipment and Materials:
Equipment included a spin-coater, UV-Vis spectrophotometry, SEM, and a solar simulator. Materials included FTO-coated glass substrates, perovskite precursors, TiCl4, and BK TiO2 NPs.
4：Experimental Procedures and Operational Workflow:
The fabrication involved cleaning FTO substrates, spin-coating BK TiO2 NPs, TiCl4 treatment, perovskite layer deposition, HTL application, and gold electrode formation.
5：Data Analysis Methods:
The performance of PSCs was evaluated through current density-voltage characteristics and IPCE measurements.
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