Chemistry, Department of
Department of Chemistry: Dissertations, Theses, and Student Research
First Advisor
Yinsheng Guo
Date of this Version
Summer 7-31-2021
Document Type
Thesis
Citation
A thesis presented to the faculty of the Graduate College at the University of Nebraska In Partial Fulfillment of the Requirements for the degree of Master of Science
Major: Chemistry
Under the supervision of Professor Yinsheng Guo
Lincoln, Nebraska, July 2021
Abstract
In this thesis, attempts have been made to understand halide exchange and mass transport inside the solid lattice of Lead Halide Perovskites (LHPs). We aim for the transformation of MAPbBr3 using ionic solutions including 1-Butyl-3-methylimidazolium iodide (BMIMI), and 1-Butyl-3-methylimidazolium chloride (BMIMCl) as halide ion sources to observe the halide diffusion across the thin film sample and to have LHPs with a gradient of mixed halides (MAPbBr3-x (I/Cl)x, 0 ≤ x ≤ 3). Successfully, MAPbBr3 single-crystalline thin film was fabricated with different configurations. Surface analysis of the LHPs, elemental composition, halide diffusion, roughness, and size of grains in our thin film was examined using a scanning electron microscope equipped with Energy-dispersive X-ray Spectroscopy (SEM-EDX), photoluminescence (PL), and Dektak-XT stylus surface profiling system.
Advisor: Yinsheng Guo
Comments
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