This article is cited in 3 papers

Optical properties

Photoluminescence of CdTe/ZnTe heterostructures with nominal CdTe layer thickness from one to eight monolayers grown by atomic layer deposition

V. F. Agekyan^a, A. Yu. Serov^a, N. G. Filosofov^a, G. Karczewski<sup>b

a</sup> Saint Petersburg State University
^b Institute of Physics, Polish Academy of Sciences, Warsaw, Poland

Abstract: The luminescence of CdTe layers with a nominal thickness of 1, 2, 4, and 8 monolayers grown by atomic layer epitaxy in ZnTe matrix was studied. It is shown that layers with a thickness of 1 and 2 monolayers are homogeneous, while layers with a nominal thickness of 4 and 8 monolayers are the planar QD arrays. The sizes of QDs and their size dispersion increase with an increase in the nominal thickness of CdTe layer. The luminescence excitation spectra of CdTe layer in the samples vary significantly. It has been shown that, depending on the energy distance between the CdTe and ZnTe exciton levels, the ratio of contributions to the energy transfer via the exciton ZnTe and charge carriers varies greatly.

Keywords: II–VI heterostructures, exciton, photoluminescence, energy transfer.

Received: 27.01.2020
Revised: 28.01.2020
Accepted: 28.01.2020

DOI: 10.21883/FTT.2020.06.49352.011

 English version: Physics of the Solid State, 2020, 62:6, 1056–1059

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