研究目的
Investigating the influence of reduced graphene oxide on titanium oxide nanofibers and their morphological and electronic properties for the fabrication of mixed-cation lead mixed-halide perovskite solar cells.
研究成果
The study successfully demonstrated that rGO-TiO2 composite nanofibers can serve as efficient electron transporting materials in perovskite solar cells, leading to a high power conversion efficiency of 17.66%. The incorporation of rGO into TiO2 NFs facilitated better charge collection and fast electron transportation, which are crucial for the high performance of the solar cells.
研究不足
The study focuses on the influence of rGO on TiO2 NFs for perovskite solar cells but does not explore the long-term stability of these devices under operational conditions. The scalability of the electrospinning technique for large-scale production is also not addressed.
1：Experimental Design and Method Selection:
Electrospinning technique was used for the synthesis of pristine-TiO2 NFs and rGO-TiO2 composite NFs. The influence of rGO on TiO2 NFs was studied for their application as electron transporting materials in perovskite solar cells.
2：Sample Selection and Data Sources:
FTO-coated glass substrates were used as the base for depositing different layers of the solar cell. The perovskite solution was prepared using formamidinium iodide (FAI), methylammonium bromide (MABr), lead iodide (PbI2), and lead bromide (PbBr2) in DMF/DMSO solution.
3：List of Experimental Equipment and Materials:
Polyvinylpyrrolidone (PVP), ethanol, titanium (IV) isopropoxide, acetic acid, graphene oxide (GO), FTO-coated glass substrates, spiro-MeOTAD, gold (Au) for contacts.
4：Experimental Procedures and Operational Workflow:
The process involved the deposition of compact TiO2, synthesis of pristine-TiO2 NFs and rGO-TiO2 composite NFs via electrospinning, deposition of perovskite layer by solvent engineering, and finally the deposition of spiro-MeOTAD HTM and Au contacts.
5：Data Analysis Methods:
The performance of the solar cells was analyzed using J-V characteristics, EQE spectrum, and the structural, morphological, and optoelectronic properties were studied using SEM, XRD, UV-Vis absorption, PL, and TRPL measurements.
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