A new perspective on lone pair dynamics in halide perovskites
- Rutgers Univ., Piscataway, NJ (United States); OSTI
- Temple Univ., Philadelphia, PA (United States)
Halide perovskites form the foundation of an emerging class of materials for broad application in renewable and sustainable applications, including photocatalysis and solar energy harvesting. These materials exhibit beneficial photophysical properties, including bandgaps suitable for solar energy harvesting and efficient charge screening that underlies efficient charge carrier separation and resistance to defects. For organic–inorganic hybrid perovskites, these benefits are thought to arise, in part, from dipolar molecular cations that can reorient in response to charged particles and defects. In this work, we provide a similar perspective for inorganic metal halide perovskites, which do not contain molecular species with permanent dipoles. We discuss how lone pair electrons lead to dipolar ions that exhibit dynamics in analogy with traditional molecular plastic crystals and hybrid perovskites. We argue that further understanding these electronic plastic crystal motions with first principles simulations and synchrotron scattering can help create a basic understanding of photophysical properties of metal halide perovskites and inform the design of advanced functional materials.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Center for Complex Materials from First Principles (CCM); Temple Univ., Philadelphia, PA (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); US Army Research Office (ARO); USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012575
- OSTI ID:
- 1767723
- Alternate ID(s):
- OSTI ID: 1618590
- Journal Information:
- APL Materials, Journal Name: APL Materials Journal Issue: 5 Vol. 8; ISSN 2166-532X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
| Cation Dynamics in Hybrid Halide Perovskites | preprint | January 2020 |
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Wannier functions
ab-initio molecular dynamics
catalysis (heterogeneous)
classical statistical mechanics
electrocatalysis
electronic band structure
energy harvester
magnetism and spin physics
materials
materials and chemistry by design
mechanical behavior
perovskites
rotational dynamics
solar (photovoltaic)
superconductivity
synthesis (novel materials)
water
Wannier functions
ab-initio molecular dynamics
catalysis (heterogeneous)
classical statistical mechanics
electrocatalysis
electronic band structure
energy harvester
magnetism and spin physics
materials
materials and chemistry by design
mechanical behavior
perovskites
rotational dynamics
solar (photovoltaic)
superconductivity
synthesis (novel materials)
water