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Dong S, Pal S, Lian J, et al. Sub-Picosecond Auger-Mediated Hole-Trapping Dynamics in Colloidal CdSe/CdS Core/Shell Nanoplatelets. ACS Nano. 2016;10(10):9370-9378doi: 10.1021/acsnano.6b04210.
Dong, S., Pal, S., Lian, J., Chan, Y., Prezhdo, O. V., & Loh, Z. H. (2016). Sub-Picosecond Auger-Mediated Hole-Trapping Dynamics in Colloidal CdSe/CdS Core/Shell Nanoplatelets. ACS nano, 10(10), 9370-9378. https://doi.org/10.1021/acsnano.6b04210
Dong, Shuo, et al. "Sub-Picosecond Auger-Mediated Hole-Trapping Dynamics in Colloidal CdSe/CdS Core/Shell Nanoplatelets." ACS nano vol. 10,10 (2016): 9370-9378. doi: https://doi.org/10.1021/acsnano.6b04210
Dong S, Pal S, Lian J, Chan Y, Prezhdo OV, Loh ZH. Sub-Picosecond Auger-Mediated Hole-Trapping Dynamics in Colloidal CdSe/CdS Core/Shell Nanoplatelets. ACS Nano. 2016 Oct 25;10(10):9370-9378. doi: 10.1021/acsnano.6b04210. Epub 2016 Sep 21. PMID: 27640430.
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ACS Nano. 2016 Oct 25;10(10):9370-9378. doi: 10.1021/acsnano.6b04210. Epub 2016 Sep 21.

Sub-Picosecond Auger-Mediated Hole-Trapping Dynamics in Colloidal CdSe/CdS Core/Shell Nanoplatelets.

ACS nano

Shuo Dong, Sougata Pal, Jie Lian, Yinthai Chan, Oleg V Prezhdo, Zhi-Heng Loh

Affiliations

  1. Division of Chemistry and Biological Chemistry, and Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371.
  2. Departments of Chemistry, and Physics and Astronomy, University of Southern California , Los Angeles, California 90089, United States.
  3. Institute of Materials Research & Engineering, A*STAR , 2 Fusionopolis Way, Innovis #08-03, Singapore 138634.
  4. Department of Chemistry, National University of Singapore , 3 Science Drive 3, Singapore 117543.

PMID: 27640430 DOI: 10.1021/acsnano.6b04210

Abstract

Quasi-two-dimensional colloidal nanoplatelets (NPLs) have recently emerged as a class of semiconductor nanomaterials whose atomically precise monodisperse thicknesses give rise to narrow absorption and emission spectra. However, the sub-picosecond carrier dynamics of NPLs at the band edge remain largely unknown, despite their importance in determining the optoelectronic properties of these materials. Here, we use a combination of femtosecond transient absorption spectroscopy and nonadiabatic molecular dynamics simulations to investigate the early time carrier dynamics of CdSe/CdS core/shell NPLs. Band-selective probing reveals sub-picosecond Auger-mediated trapping of holes with an effective second-order rate constant of 3.5 ± 1.0 cm

Keywords: Auger carrier heating; carrier cooling; femtosecond transient absorption spectroscopy; quantum wells; ultrafast carrier dynamics

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