Observation of Individual (Quantum) Emitters Formed by Different Types of Dislocation Cores in Cadmium Telluride Films

In a CdTe film with an oriented system of (111) stacking faults, the presence of two types of luminescent centers characterized by a high degree of linear polarization of emission and exhibiting different orientations of the linear polarization plane with respect to the preferred direction [–111] is...

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Published inBulletin of the Lebedev Physics Institute Vol. 50; no. 2; pp. 55 - 62
Main Authors Pruchkina, A. A., Krivobok, V. S., Chernopitssky, M. A., Nikolaev, S. N., Chentsov, S. I., Tatarinova, N. S., Barinova, L. A.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.02.2023
Springer Nature B.V
Subjects
Cadmium tellurides
Emitters
Excitons
Linear polarization
Physics
Physics and Astronomy
Spectral emittance
Stacking faults
extended defects
photoluminescence
cadmium telluride
CdTe
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Summary:In a CdTe film with an oriented system of (111) stacking faults, the presence of two types of luminescent centers characterized by a high degree of linear polarization of emission and exhibiting different orientations of the linear polarization plane with respect to the preferred direction [–111] is shown. An analysis of individual (quantum) emitters associated with these centers allows us to state that they are exciton states formed by fragments of partial dislocations cores of two different types. The spectral position and polarization of emitters of the first type indicate their relation to 90° Shockley dislocations with Te core. The presence of emitters of the second type suggests that at least one of the three remaining types of partial dislocations (90° with Cd core, 30° with Te and Cd cores) forms shallow exciton states with high luminescence intensity.
ISSN:1068-3356
1934-838X
DOI:10.3103/S1068335623020070