Origin of Reversible Photoinduced Phase Separation in Hybrid Perovskites
University of California, Berkeley · Lawrence Berkeley National Laboratory · +2 more institutions
Abstract
The distinct physical properties of hybrid organic-inorganic materials can lead to unexpected nonequilibrium phenomena that are difficult to characterize due to the broad range of length and time scales involved. For instance, mixed halide hybrid perovskites are promising materials for optoelectronics, yet bulk measurements suggest the halides reversibly phase separate upon photoexcitation. By combining nanoscale imaging and multiscale modeling, we find that the nature of halide demixing in these materials is distinct from macroscopic phase separation. We propose that the localized strain induced by a single photoexcited charge interacting with the soft, ionic lattice is sufficient to promote halide phase…
Citation impact
- FWCI
- 36.68
- Percentile
- 100%
- References
- 42
Authors
7- CGConnor G. Bischak
University of California, Berkeley
- CLCraig L. Hetherington
Lawrence Berkeley National Laboratory, University of California, Berkeley
- HWHao Wu
Harvard University, University of California, Berkeley
- SAShaul Aloni
Lawrence Berkeley National Laboratory
- DFD. Frank Ogletree
Lawrence Berkeley National Laboratory
Topics & keywords
- Materials science
- Phase (matter)
- Perovskite (structure)
- Photoinduced charge separation
- Chemical engineering
- Optoelectronics
- Chemical physics
- Nanotechnology
- Affordable and clean energy
Funding
- NSNational Science FoundationAwards: 1106400, DE-AC02-05CH11231, DGE 1106400
- DADavid and Lucile Packard Foundation
- UDU.S. Department of EnergyAwards: -AC02-05CH11231, 05CH11231, AC02-05CH11231, DE-AC02, DGE 1106400, DE-AC02-05CH11231, DE-AC02-
- APAlfred P. Sloan Foundation
- CACamille and Henry Dreyfus Foundation
- OOOffice of ScienceAwards: AC02-05CH11231, -AC02-05CH11231, DE-AC02
- DODivision of Graduate EducationAward: DGE 1106400
- BEBasic Energy SciencesAwards: DE-AC02, AC02-05CH11231, DE-AC02-05CH11231, -AC02-05CH11231
- LBLawrence Berkeley National LaboratoryAwards: DE-AC02-05CH11231, 05CH11231, AC02-05CH11231