研究目的
Investigating the performance and stability of all-inorganic, hole-transporting-layer-free, carbon-based CsPbIBr2 planar solar cells with ZnO as electron-transporting materials.
研究成果
The study successfully demonstrated the use of ZnO as an electron-transporting material in all-inorganic, hole-transporting-layer-free, carbon-based CsPbIBr2 planar solar cells, achieving a PCE of 7.60%. The solar cells exhibited good thermal and humid stability, with minimal efficiency loss under tested conditions. This approach lays a foundation for the development of low-temperature processed, flexible perovskite solar cells.
研究不足
The efficiency of the solar cells is still not competitive with the highest reported values for perovskite solar cells. The study is limited to laboratory-scale fabrication and does not address large-scale production challenges.
1：Experimental Design and Method Selection:
The study utilized a spin-coating method for the deposition of ZnO and CsPbIBr2 layers, and a doctor-blade coating method for the carbon electrode. The overall design aimed to replace TiO2 with ZnO to lower the processing temperature.
2：Sample Selection and Data Sources:
Fluorine-doped tin dioxide (FTO) glasses were used as substrates. The CsPbIBr2 precursor solution was prepared from PbBr2 and CsI dissolved in DMSO.
3：List of Experimental Equipment and Materials:
Equipment included a spin coater, glove box, SEM, XRD, UV/Vis spectrometer, and solar simulator. Materials included PbBr2, CsI, DMSO, ZnO nanoparticle solution, and carbon paste.
4：Experimental Procedures and Operational Workflow:
The ZnO layer was spin-coated and annealed at 120 °C. The CsPbIBr2 layer was deposited via a one-step spin-coating method, followed by annealing at 280 °C. The carbon electrode was applied using a doctor-blade method and annealed at 120 °C.
5：Data Analysis Methods:
The photovoltaic performance was evaluated using J-V curves under AM 1.5G illumination. Structural and optical properties were analyzed using XRD, SEM, UV/Vis, PL, and TRPL measurements.
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