Broadband sensitization of lanthanide emission with indium phosphide quantum dots for visible to NIR downshifting
Abstract
Semiconductor quantum dot (QD)-sensitized lanthanide ions hold great promise in producing a broadly absorbing and sharply emitting luminophore, but their synthesis has proven to be difficult. We report the first synthesis of core/shell/shell InP/Ln_xY_(1–x)F_3/ShF_3 (Ln = Yb, Nd; Sh = Lu, Y) nanocrystals that exhibit a broad visible absorption coupled to a sharp near-infrared emission. Additionally, this is the first report of Nd being coupled to a QD absorber. We characterize the system with a variety of electron microscopy and X-ray techniques that prove this unique structure. Optical measurements confirm the correlation of the Ln^(3+) emission to the QD absorption, while the presence of a trap-state emission gives a clue as to the mechanism of energy transfer between the dot and the lanthanide.
Additional Information
© 2018 American Chemical Society. Received: March 12, 2018; Published: June 20, 2018. The authors thank Brent Koscher for general advice and Matthew Marcus and Sirine Fakra of ALS beamline 10.3.2 for help with EXAFS measurements. The work was supported by the Light-Material Interactions in Energy Conversion, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract DE-AC02-05CH11231, part of the EFRC at Caltech under DE-SC0001293. Work at the Molecular Foundry was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-05CH11231. This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. The authors declare no competing financial interest.Attached Files
Supplemental Material - ja8b02612_si_001.pdf
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Additional details
- Eprint ID
- 87277
- Resolver ID
- CaltechAUTHORS:20180620-153421260
- Department of Energy (DOE)
- DE-AC02-05CH11231
- Department of Energy (DOE)
- DE-SC0001293
- Created
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2018-06-20Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field
- Caltech groups
- JCAP