Display options
Cite
Meng Z, Mahler B, Houel J, et al. Perspectives for CdSe/CdS spherical quantum wells as rapid-response nano-scintillators. Nanoscale. 2021;13(46):19578-19586doi: 10.1039/d1nr04781g.
Meng, Z., Mahler, B., Houel, J., Kulzer, F., Ledoux, G., Vasil'ev, A., & Dujardin, C. (2021). Perspectives for CdSe/CdS spherical quantum wells as rapid-response nano-scintillators. Nanoscale, 13(46), 19578-19586. https://doi.org/10.1039/d1nr04781g
Meng, Zhu, et al. "Perspectives for CdSe/CdS spherical quantum wells as rapid-response nano-scintillators." Nanoscale vol. 13,46 (2021): 19578-19586. doi: https://doi.org/10.1039/d1nr04781g
Meng Z, Mahler B, Houel J, Kulzer F, Ledoux G, Vasil'ev A, Dujardin C. Perspectives for CdSe/CdS spherical quantum wells as rapid-response nano-scintillators. Nanoscale. 2021 Dec 02;13(46):19578-19586. doi: 10.1039/d1nr04781g. PMID: 34807212.
Copy Download .nbib Format: NLM
Share it on

Nanoscale. 2021 Dec 02;13(46):19578-19586. doi: 10.1039/d1nr04781g.

Perspectives for CdSe/CdS spherical quantum wells as rapid-response nano-scintillators.

Nanoscale

Zhu Meng, Benoit Mahler, Julien Houel, Florian Kulzer, Gilles Ledoux, Andrey Vasil'ev, Christophe Dujardin

Affiliations

  1. Institut Lumière Matière, UMR5306 Université Lyon 1-CNRS, Université de Lyon, 69622 Villeurbanne cedex, France. [email protected].
  2. Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119991 Moscow, Russia.

PMID: 34807212 DOI: 10.1039/d1nr04781g

Abstract

We explore the effect of the shell thickness on the time response of CdS/CdSe/CdS spherical quantum wells (SQWs) nanoscintillators under X-ray excitation. We first compare the spectral and timing properties under low and intense optical excitation, which allows us to identify the complex temporal and spectral response of the highly excited species. We find that a defect-induced delayed luminescence appears at large sizes. Under pulsed X-ray excitation, an analysis of the scintillation decay time reveals that multiexcitons are generated, similarly to the intense optical excitation and that the shell thickness does not change the fraction of fast component to a large extent. We performed a two-step simulation of the energy relaxation in the SQWs which reveals that large-size SQWs favor a very high number of excitations per particle, which, however, is counterbalanced by increased Auger quenching, rendering large SQWs less effective regarding the timing performance.

Publication Types