자료유형  

 학위논문

Control Number  

0017161070

International Standard Book Number  

9798382720982

Dewey Decimal Classification Number  

540

Main Entry-Personal Name  

Serafin, Lorenzo Young.

Publication, Distribution, etc. (Imprint  

[S.l.] : The University of North Carolina at Chapel Hill., 2024

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2024

Physical Description  

111 p.

General Note  

Source: Dissertations Abstracts International, Volume: 85-11, Section: B.

General Note  

Advisor: Cahoon, James.

Dissertation Note  

Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2024.

Summary, Etc.  

요약Herein we present the results of a series of investigations on the interactions of hybrid perovskites with amine vapors. Building upon previous work with the deliquescence of methylammonium lead iodide with methylamine, we show that this phenomenon extends to the layered Ruddlesden-Popper variety of hybrid perovskites. Further, we report that hybrid perovskites undergo a chemical transformation when exposed to a vapor environment of mixed amine composition, resulting in the formation of a layered perovskite whose stoichiometry and structure are determined by the exact composition of the amine atmosphere. Furthermore, we performed fundamental investigations into the deliquescent behavior of hybrid perovskites with amine vapor via in situ quartz crystal microbalance measurements, showing that the perovskites proceed step-wise through a crystalline intermediate en route to full solvation. We simulated the structure of this intermediate for methylammonium lead iodide via density functional theory and corroborated the result with X-ray diffraction measurements. We also showed that changes in dissipation of the quartz crystal can be detected when an adhered methylammonium lead iodide layer was exposed to amine vapor atmospheres with varying composition, providing an indirect measure of the ratio of incorporated amines, a proxy for the ammonium cation ratio in the films that dictates structure and optoelectronic properties. Finally, we report on initial efforts to leverage these vapor interactions in attempts to grow bulk single crystals and single crystal thin films of methylammonium lead iodide.

Subject Added Entry-Topical Term  

Chemistry.

Subject Added Entry-Topical Term  

Physical chemistry.

Subject Added Entry-Topical Term  

Materials science.

Subject Added Entry-Topical Term  

Inorganic chemistry.

Index Term-Uncontrolled  

Crystal growth

Index Term-Uncontrolled  

Deliquescence

Index Term-Uncontrolled  

Perovskite

Index Term-Uncontrolled  

Quartz crystal microbalance

Index Term-Uncontrolled  

Ruddlesden-Popper

Index Term-Uncontrolled  

Vapor

Added Entry-Corporate Name  

The University of North Carolina at Chapel Hill Chemistry

Host Item Entry  

Dissertations Abstracts International. 85-11B.

Electronic Location and Access  

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Control Number  

joongbu:656557