Journal Article

PUBDB-2024-08099

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Sub-millielectronvolt Line Widths in Polarized Low-Temperature Photoluminescence of 2D PbS Nanoplatelets

Li, P. ; Biesterfeld, L.Extern* ; Klepzig, L. F. ; Yang, J. ; Ngo, H. T. ; Addad, A. ; Rakow, T. N. ; Guan, R. ; Rugeramigabo, E. P. ; Zaluzhnyy, I.Extern* ; Schreiber, F.Extern* ; Biadala, L. (Corresponding author) ; Lauth, J. (Corresponding author)Extern* ; Zopf, M. (Corresponding author)

2024
ACS Publ. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.nanolett.4c04402  doi:10.3204/PUBDB-2024-08099

Abstract: Colloidal semiconductor nanocrystals are promising materials for classical and quantum light sources due to their efficient photoluminescence (PL) and versatile chemistry. While visible emitters are well-established, excellent (near-infrared) sources are still being pursued. We present the first comprehensive analysis of low-temperature PL from two-dimensional (2D) PbS nanoplatelets (NPLs). Ultrathin 2D PbS NPLs exhibit high crystallinity confirmed by scanning transmission electron microscopy, revealing Moiré patterns in overlapping NPLs. At 4 K, unique PL features are observed in single PbS NPLs, including narrow zero-phonon lines with line widths down to 0.6 meV and a linear degree of polarization up to 90%. Time-resolved measurements identify trions as the dominant emission source with a 2.3 ns decay time. Sub-meV spectral diffusion and no inherent blinking over minutes are observed, as well as discrete spectral jumps without memory effects. These findings advance the understanding and underscore the potential of colloidal PbS NPLs for optical and quantum technologies.

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Contributing Institute(s):

1. FS DOOR-User (FS DOOR-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20220914 (I-20220914) (I-20220914)
3. DFG project G:(GEPRIS)390837967 - EXC 2123: QuantumFrontiers - Licht und Materie an der Quantengrenze (390837967) (390837967)
4. DFG project G:(GEPRIS)390833453 - EXC 2122: PhoenixD: Photonics, Optics, and Engineering – Innovation Across Disciplines (390833453) (390833453)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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