Experimental and Theoretical Studies of CdSe/CdMnS core/shell nanaoplatelets in variable magnetic fields

ORAL

Abstract

We performed time-resolved photoluminescence (PL) studies of colloidal nanoplatelets (NPL) samples at temperatures (T=5,10 K) in the presence of a magnetic field B that is perpendicular to the NPL planes. We performed the experiments on two NPL samples, samples A and B. Samples (A/B) have a CdSe core (5ML/5ML) surrounded by a CdMnS(2ML/2ML) and CdS (4ML/8ML) shell. The band-edge emission time evolution cn be described by two-time constants for both samples. A fast recombination time which is excitonic and a slow recombination that involves electrons with holes localized at the CdSe/CdMnS interfaces. Both time constants depend on the externally applied magnetic field. A theoretical model was developed to interpret these results. [1] J.R. Murphy et al., Appl. Phys. Lett. 2016, 108, 242406

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Presenters

  • James M Pientka

    • St. Bonaventure University

Authors

  • James M Pientka

    • St. Bonaventure University

  • Arinjoy Bhattacharya

    • State Univ of NY - Buffalo

  • Peiyao Zhang

    • University of California Berkeley

  • Savas Delikanli

    • Department of Electrical and Electronics Engineering, Department of Physics, UNAM – Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey

  • Furkan Isik

    • Department of Electrical and Electronics Engineering, Department of Physics, UNAM – Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey

  • Hilmi Volkan Demir

    • Luminous! Center of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Materials Sciences, Nanyang Tec

  • Xiang Zhang

    • University of California, Berkeley

  • Athos Petrou

    • State Univ of NY - Buffalo