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Article Dans Une Revue physica status solidi (RRL) - Rapid Research Letters Année : 2020

Correlated Structural and Luminescence Analysis of B‐Doped Si‐Nanocrystals Embedded in Silica

Résumé

Structural characteristics and luminescence properties of B-doped silicon nanocrystals (Si-ncs) embedded in a SiO2 matrix elaborated by ion beam synthesis are investigated. The use of atom probe tomography gives a unique opportunity to experimentally evidence the exact location and composition of B atoms in doped Si-ncs. These experiments allow to conclude about a favored B location at the periphery of the Si-ncs depending on their size. In this way, two categories of Si-ncs can be described: 1) largest Si-ncs that are B-doped and where B atoms are located at the Si-ncs/SiO2 interface, and 2) smallest Si-ncs that remain undoped but seem to be surrounded by a B-rich SiO2 shell. These structural characteristics (composition and diameters) are correlated to the photoluminescence properties of these Si-ncs. These measurements show the well-known quenching of Si-ncs luminescence due to high B doping, which allows us to conclude about the environment changes brought by the presence of B in Si-ncs or of B-rich shell around Si-ncs.
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hal-03329836 , version 1 (08-10-2021)

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Rémi Demoulin, Dominique Muller, Daniel Mathiot, Philippe Pareige, Etienne Talbot. Correlated Structural and Luminescence Analysis of B‐Doped Si‐Nanocrystals Embedded in Silica. physica status solidi (RRL) - Rapid Research Letters, 2020, 14 (6), pp.2000107. ⟨10.1002/pssr.202000107⟩. ⟨hal-03329836⟩
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