Journal article
Interfacial Topochemical Fluoridation of MAPbI(3) by Fluoropolymers
The journal of physical chemistry letters, v 14(21), pp 5040-5047
25 May 2023
PMID: 37227112
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Herein it is demonstrated that, under conditions relevantto perovskitesynthesis (>140 degrees C in air), fluoride can topochemically reactacross the interface between a halide perovskite and a fluoropolymerwhen in close contact, thereby creating a small quantity of stronglybonded lead fluoride species. The quantity increases with temperatureand processing duration. Photoinduced charge carrier lifetime providesa metric for the resulting changes in electronic structure of theperovskite. Under short-duration and/or moderate temperature processing,fluoride transfer to the perovskite yields increased carrier lifetimes,up to 3-fold longer than control samples, which is attributed to passivationof surface defects. Under more forcing conditions, the trend reverses:excessive fluoridation leads to shortened carrier lifetimes, whichis ascribed to substantial interfacial formation of PbF2. It is demonstrated that an interface with bulk crystalline PbF2 quenches perovskite photoluminescence, likely due to PbF2 serving as an electron acceptor for the conduction band ofMAPbI(3).
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Details
- Title
- Interfacial Topochemical Fluoridation of MAPbI(3) by Fluoropolymers
- Creators
- Benjamin M. Lefler - Drexel UniversityTheodore J. Houser - Drexel Univ, Dept Chem & Biol Engn, Philadelphia, PA 19104 USAArkita Chakrabarti - Drexel UniversitySteven J. May - Drexel UniversityAaron T. Fafarman - Drexel University
- Publication Details
- The journal of physical chemistry letters, v 14(21), pp 5040-5047
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 8
- Grant note
- DMR-1847952 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Chemical and Biological Engineering
- Web of Science ID
- WOS:001008905500001
- Scopus ID
- 2-s2.0-85160966162
- Other Identifier
- 991020834417504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Atomic, Molecular & Chemical