This study explores the influence of molar ratio of the synthetic solution of methylammonium iodide (MAI) and PbI2 on perovskite solar cells. The complete perovskite crystals must be produced in a low-humidity environment. The substrate is spin-coated in the adjusted MAPbI3 synthesis solution and annealed by using a nitrogen furnace tube to form perovskite crystals. During the crystallization of MAPbI3, some of the PbI2 remains, which improves the efficiency of the perovskite solar cell. Therefore, we adjust the molar concentration of MAI to find the appropriate amount of the PbI2 residual. We fix the MAI molar concentration at 1 M and adjust the PbI2 molar concentration from 0.8 M to 1.4 M. The molar ratios of MAI and PbI2 are, then, 1:0.8, 1:1, 1:1.2, and 1:1.4, respectively. Then, we use UV–vis, FE-SEM, and photoelectric conversion efficiency (PCE) measurements for comparing the growth of perovskite crystals and their photoelectric characteristics. The results show that 1.2 M of PbI2 is the most appropriate concentration for perovskite solar cells among the adjusted concentrations.
This study mainly is carried out to discuss the effect of nitrogen annealing temperature on perovskite solar cells. The annealing temperature affects perovskite solar cells during the annealing process. It also affects the formation of perovskite crystals. Perovskite crystals need to form in a nitrogen box for manufacturing Perovskite solar cells. Spin-coating MAPbI3 on the substrate is annealed with a nitrogen furnace tube to form perovskite crystals. The remaining PbI2 after the annealing is completed to improve the efficiency of perovskite solar cells. The optimal temperature for the formation of perovskite crystals is found by adjusting the annealing temperature. By using UV-visible spectrometer, field emission-scanning electron microscope, and measurements of photoelectric conversion efficiency, cell structure and optoelectronic properties are analyzed as the final results.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.