研究目的
Investigating the effect of immerse time of PbI2 in CH3NH3I solutions on the microstructure and performance of perovskite solar cells.
研究成果
The immerse time of PbI2 in CH3NH3I solution significantly affects the morphology and efficiency of perovskite solar cells. A 1-minute immerse time resulted in the best morphology, optical properties, and efficiency (0.91%). The device also showed potential as a photodetector due to its response to light.
研究不足
The synthesis process was carried out at room temperature without environmental control, which may have affected the crystal structure due to moisture. The efficiency values obtained were lower than expected, possibly due to these uncontrolled conditions.
1：Experimental Design and Method Selection:
The study used the dip coating method to synthesize perovskite films with varying immerse times (1, 2, 3, and 4 minutes) to investigate their effect on microstructure and solar cell performance.
2：Sample Selection and Data Sources:
ITO substrates were used, cleaned with ethanol, acetone, and DI water in an ultrasonic bath. ZnO nanoparticles were synthesized by a sol-gel spin coating method on ITO substrates.
3：List of Experimental Equipment and Materials:
Instruments included XRD, SEM, UV-Vis spectrophotometer, and a spin coater. Materials included Zinc Acetate Dihydrate, Monoethanolamine, PbI2, CH3NH3I, and DMF solvent.
4：Experimental Procedures and Operational Workflow:
The process involved the synthesis of ZnO nanoparticles, preparation of PbI2 and CH3NH3I solutions, dip coating of PbI2 layer into CH3NH3I solution with varying immerse times, and annealing.
5：Data Analysis Methods:
XRD for crystal structure analysis, SEM for morphology, UV-Vis for optical properties, and J-V measurement for solar cell performance.
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