Journal article
Semiconductor Nanoplatelet Excimers
Nano letters, v 18(11), pp 6948-6953
14 Nov 2018
PMID: 30244582
Abstract
Excimers, a portmanteau of "excited dimer", are transient species that are formed from the electronic interaction of a fluorophore in the excited state with a neighbor in the ground state, which have found extensive use as laser gain media. Although common in molecular fluorophores, this work presents evidence for the formation of excimers in a new class of materials: atomically precise two-dimensional semiconductor nanoplatelets. Colloidal nanoplatelets of CdSe display two-color photoluminescence resolved at low temperatures with one band attributed to band-edge fluorescence and a second, red band attributed to excimer fluorescence. Previously reasonable explanations for two-color fluorescence, such as charging, are shown to be inconsistent with additional evidence. As with excimers in other materials systems, excimer emission is increased by increasing nanoplatelet concentration and the degree of cofacial stacking. Consistent with their promise as low-threshold gain media, amplified spontaneous emission emerges from the excimer emission line.
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Details
- Title
- Semiconductor Nanoplatelet Excimers
- Creators
- Benjamin T. Diroll - Argonne National LaboratoryWooje Cho - University of ChicagoIgor Coropceanu - University of ChicagoSamantha M. Harvey - Northwestern UniversityAlexandra Brumberg - Northwestern UniversityNicholas Holtgrewe - University of ChicagoScott A. Crooker - National High Magnetic Field LaboratoryMichael R. Wasielewski - Northwestern UniversityVitali B. Prakapenka - University of ChicagoDmitri V. Talapin - University of ChicagoRichard D. Schaller - Northwestern UniversityArgonne National Laboratory (ANL), Argonne, IL (United States)
- Publication Details
- Nano letters, v 18(11), pp 6948-6953
- Publisher
- Amer Chemical Soc
- Number of pages
- 6
- Grant note
- EAR-1634415 / NSF Earth Sciences; National Science Foundation (NSF) DE-AC02-06CH11357 / U.S. Department of Energy (DOE) Office of Science User Facility; United States Department of Energy (DOE) DMR-1710104 / National Science Foundation; National Science Foundation (NSF) DE-AC02-06CH11357 / DOE Office of Science by Argonne National Laboratory; United States Department of Energy (DOE) DGE-1324585 / National Science Foundation (NSF) Research Fellowship Program; National Science Foundation (NSF) DMR-1644779 / NSF; National Science Foundation (NSF) EAR-1531583 / NSF-MRI; National Science Foundation (NSF); NSF - Office of the Director (OD) State of Florida DMR-1629601; DMR-1629383 / NSF DMREF Program; National Science Foundation (NSF); NSF - Directorate for Computer & Information Science & Engineering (CISE) DE-FG02-94ER14466 / DOE, Geosciences; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000451102100039
- Scopus ID
- 2-s2.0-85054406064
- Other Identifier
- 991022053869304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter