Thesis
Study on stabilization of organo-halide perovskite particles in aqueous suspensions
Master of Science (M.S.), Drexel University
Jun 2018
DOI:
https://doi.org/10.17918/yac2-jh98
Abstract
Organometallic-halide perovskite has been intensively studied for its potential applications in solar cells, LED and display due to the optoelectronic properties related to their nanometer sizes. For example, the perovskite MAPbBr3 has demonstrated very good photoluminescent properties and has great potential for biological imaging and detection. However, the fact that perovskite can be damaged by water hinders their use in the hydrophilic aqueous environment. Motivated by the excellent photoluminescent properties of MAPbBr3 nanoparticles, the goal of the thesis is to develop a stable aqueous MAPbBr3 suspensions for the potential bioimaging applications. The present work studies the use of amphiphilic copolymer PMAO-PEG (Poly(maleic anhydride-alt-1-octadecene)-polyethylene glycol) in encapsulating perovskite particles to form an emulsion that can be stable in water with time. The perovskite of interest is MA0.4OA0.6PbBr3, (methylammonium/octylammonium lead bromide) which has a hydrophobic surface due to the long alkyl chains acting as intrinsic capping molecules. The results obtained in this work enable perovskite particles to stay in an aqueous environment in the form of oil droplets while maintaining its photoluminescence property for a period of time without significant emission wavelength shift. Single-phase emulsion can retain photoluminescent property for more than 30 minutes with good emulsion stability, on the other hand, perovskite can be stable in the multi-phase emulsions for more than 10 days.
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Details
- Title
- Study on stabilization of organo-halide perovskite particles in aqueous suspensions
- Creators
- Jing Chen - DU
- Contributors
- Wei-Heng Shih (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Number of pages
- xi, 63 pages
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- Materials (Science and) Engineering (Metallurgical Engineering) (1970-2026); College of Engineering (1970-2026); Drexel University
- Other Identifier
- 8237; 991014632419404721