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dc.contributor.advisorXing, Yangchuaneng
dc.contributor.authorGoriacheva, Mariiaeng
dc.date.issued2017eng
dc.date.submitted2017 Falleng
dc.descriptionField of study: Chemical engineering.eng
dc.descriptionDr. Yangchuan Xing, Thesis Supervisor.eng
dc.description"December 2017."eng
dc.description.abstractTrihalide perovskite nanocrystals have recently emerged as a new class of superior nanoscale semiconductors due to their outstanding optoelectronic properties. A family of all-inorganic CsPbX3 (X=Cl, Br, and I) perovskite nanocrystals is of a particular interest, due to its higher resistance to moisture, heat, and continuous irradiation. In this thesis work a novel chemical route was designed and studied for inducing the growth of CsPbBr3 perovskite nanocrystals at room temperature by intentional depletion of stabilizing ligands, leading to the nanocrystals' fusion. The growth of nanocrystals was achieved from 8 nm to 35 nm in average lateral dimensions, while preserving their optical and colloidal integrity. The thickness was found to be approx. 14 nm. Both UV-visible absorption and photoluminescence emission spectra indicated a red shift in the grown nanocrystals, compared to that of as-synthesized 8 nm nanocrystals. It was determined that the growth of NCs happened in all three dimensions, supporting the theory of induced fusion. The discovered chemical route for triggering post-synthetic growth of as-synthesized perovskite nanocrystals offered a new perception on understanding the role of stabilizing surfactants on the surface of perovskite nanocrystals. It was shown experimentally that the ligands not only participated in colloidal stabilization and photoluminescence enhancement, but also could be efficiently employed for post-synthetic manipulation of nanocrystals' size, band gap and shape.eng
dc.description.bibrefIncludes bibliographical references (pages 43-47).eng
dc.format.extent1 online resource (vi, 47 pages) : illustrations (some color)eng
dc.identifier.merlinb129200669eng
dc.identifier.oclc1099527496eng
dc.identifier.urihttps://hdl.handle.net/10355/66737
dc.languageEnglisheng
dc.publisherUniversity of Missouri--Columbiaeng
dc.relation.ispartofcommunityUniversity of Missouri--Columbia. Graduate School. Theses and Dissertationseng
dc.rightsOpenAccess.eng
dc.rights.licenseThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.eng
dc.sourceSubmited to University of Missouri--Columbia Graduate School.eng
dc.titleChemically-induced controlled growth of CsPbBr3 perovskite nanocrystalseng
dc.typeThesiseng
thesis.degree.disciplineChemical engineering (MU)eng
thesis.degree.grantorUniversity of Missouri--Columbiaeng
thesis.degree.levelMasterseng
thesis.degree.nameM.S.eng


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