Journal article
Area and thickness dependence of Auger recombination in nanoplatelets
The Journal of chemical physics, Vol.153(5), 054104
07 Aug 2020
PMID: 32770880
Abstract
The ability to control both the thickness and the lateral dimensions of colloidal nanoplatelets offers a test-bed for area and thickness dependent properties in 2D materials. An important example is Auger recombination, which is typically the dominant process by which multiexcitons decay in nanoplatelets. Herein, we uncover fundamental properties of biexciton decay in nanoplatelets by comparing the Auger recombination lifetimes based on interacting and noninteracting formalisms with measurements based on transient absorption spectroscopy. Specifically, we report that electron-hole correlations in the initial biexcitonic state must be included in order to obtain Auger recombination lifetimes in agreement with experimental measurements and that Auger recombination lifetimes depend nearly linearly on the lateral area and somewhat more strongly on the thickness of the nanoplatelet. We also connect these scalings to those of the area and thickness dependencies of single exciton radiative recombination lifetimes, exciton coherence areas, and exciton Bohr radii in these quasi-2D materials.
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Details
- Title
- Area and thickness dependence of Auger recombination in nanoplatelets
- Creators
- John P. Philbin - University of California, BerkeleyAlexandra Brumberg - Northwestern UniversityBenjamin T. Diroll - Argonne National LaboratoryWooje Cho - University of ChicagoDmitri Talapin - University of ChicagoRichard D. Schaller - Northwestern UniversityEran Rabani - University of California, Berkeley
- Publication Details
- The Journal of chemical physics, Vol.153(5), 054104
- Publisher
- American Institute of Physics
- Number of pages
- 7
- Grant note
- DMR-1629361; DMR-1629601; DMR-1629383 / National Science Foundation DMREF Program; National Science Foundation (NSF); NSF - Directorate for Computer & Information Science & Engineering (CISE) DE-AC02-05CH11231 / National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science DE-AC02-06CH11357 / U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; United States Department of Energy (DOE) DGE-1324585 / Graduate Research Fellowship Program LFR-17-477237 / University of California Lab Fee Research Program
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:000559788000004
- Scopus ID
- 2-s2.0-85089261936
- Other Identifier
- 991022053793904721