研究目的
Tailoring of nanostructured mixed halide perovskite MAPb(I1-xBrx)3 films with tunable band gap fabricated by anion exchange reaction for solar cell application.
研究成果
The study successfully tailored nanostructured mixed halide perovskite films with tunable band gaps via anion exchange reaction, demonstrating a reproducible shape transformation process. The best performing solar cell device achieved a power conversion efficiency of 15.237% in reverse sweep, highlighting the potential of these films for optoelectronic applications.
研究不足
The study focuses on the fabrication and optimization of nanocube mixed halide perovskite films, with potential limitations in scalability and the need for further optimization of device performance and stability.
1：Experimental Design and Method Selection:
Two-step spin coating process was used to fabricate perovskite films, involving PbBr2/DMF spin-coated onto m-TiO2/FTO substrate followed by spin coating of methyl ammonium iodide (MAI)/iso-propyl alcohol (IPA).
2：Sample Selection and Data Sources:
Corning glass and FTO substrates were used. PbBr2 (1 M) in DMF and MAI in IPA were the primary materials.
3：List of Experimental Equipment and Materials:
Field emission scanning electron microscope (FESEM), X-ray powder diffraction method, Perkin-elmer ultra violet visible (UV–Vis) spectrophotometer, current-voltage (I-V) characteristics measurement setup.
4：Experimental Procedures and Operational Workflow:
Substrates were cleaned and treated with UV light. PbBr2/DMF was spin-coated followed by MAI/IPA with varying concentrations, reaction times, spinning rates, and spinning times. Films were annealed at 100°C for 5 min.
5：Data Analysis Methods:
Morphology was examined with FESEM, phase analysis by XRD, absorption spectra by UV–Vis spectrophotometer, and photovoltaic performance by I-V characteristics under AM1.5G illumination.
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