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Volume 222, 2020
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The red and blue luminescence in silicon nanocrystals with an oxidized, nitrogen-containing shell

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Abstract

Traditionally, two classes of silicon nanocrystals (SiNCs) are recognized with respect to their light-emission properties. These are usually referred to as the “red” and the “blue” emitting SiNCs, based on the spectral region in which the larger part of their luminescence is concentrated. The origin of the “blue” luminescence is still disputed and is very probably different in different systems. One of the important contributions to the discussion about the origin of the “blue” luminescence was the finding that the exposure of SiNCs to even trace amounts of nitrogen in the presence of oxygen induces the “blue” emission, even in originally “red”-emitting SiNCs. Here, we obtained a different result. We show that the treatment of “red” emitting, already oxidized SiNCs in a water-based environment containing air-related radicals including nitrogen-containing species as well as oxygen, diminishes, rather than induces the “blue” luminescence.

Graphical abstract: The red and blue luminescence in silicon nanocrystals with an oxidized, nitrogen-containing shell

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Article information


Submitted
27 Sep 2019
Accepted
22 Oct 2019
First published
22 Oct 2019

Faraday Discuss., 2020,222, 240-257
Article type
Paper

The red and blue luminescence in silicon nanocrystals with an oxidized, nitrogen-containing shell

P. Galář, T. Popelář, J. Khun, I. Matulková, I. Němec, K. D. Newell, A. Michalcová, V. Scholtz and K. Kůsová, Faraday Discuss., 2020, 222, 240
DOI: 10.1039/C9FD00092E

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