@article{1aa7d20976e3445a9a40eb2360fd2c9a,
title = "Enhancement of Emission from Lanthanide Dopants in Perovskite Nanocrystals through a Temperature-Dependent Phase Transformation of the Perovskite Lattice",
abstract = "The excited states of lanthanide ions (Ln3+) exhibit ultranarrow emission and long spin dephasing lifetimes suitable for optoelectronic and quantum applications but are not directly optically accessible. One effective strategy to excite Ln3+ ions is to dope them into a semiconductor host lattice, which acts as a photosensitizer. This work describes enhancement of emission intensity by a factor of 19 with decreasing temperature (from 300 to 5 K) from Sm3+ ions in CsPbCl3 nanocrystal hosts. Structural characterization over the same temperature region reveals that this enhancement is primarily due to a symmetry-lowering cubic-to-orthorhombic phase transition of the host lattice, which reduces the local site symmetry of the dopant and increases the Sm3+∗ emission quantum yield.",
author = "Chang, {Woo Je} and Shawn Irgen-Gioro and Vong, {Albert F.} and Hacksung Kim and Mara, {Michael W.} and Chen, {Lin X.} and Weiss, {Emily A.}",
note = "Funding Information: This work was supported as part of the Center for Molecular Quantum Transduction (CMQT), an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award DE-SC0021314. The authors made use of the Northwestern University NUANCE Center and IMSERC Center, which are partially supported by the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-2025633), the Materials Research Science and Engineering Center (NSF DMR-1720139), the state of Illinois, and Northwestern University. Raman work was supported by the US Department of Energy, Office of Basic Energy Sciences, through Grant DE-FG02-03ER15457 to the Institute for Catalysis for Energy Processes (ICEP) at Northwestern University. This research used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory, under Contract DE-AC02-06CH11357. W.J.C. acknowledges Kwanjeong Educational Foundation for the doctoral fellowship and Connor K. Terry Weatherly for the helpful discussion. Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",
year = "2022",
month = sep,
day = "15",
doi = "10.1021/acs.jpcc.2c03189",
language = "English (US)",
volume = "126",
pages = "15247--15253",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "36",
}