Features of the Composition and Photoluminescent Properties of Porous Silicon Depending on Its Porosity Index-Reference-Cited by-同舟云学术

Features of the Composition and Photoluminescent Properties of Porous Silicon Depending on Its Porosity Index

Published:2023-02-08 Issue:2 Volume:13 Page:385
ISSN:2079-6412
Container-title:Coatings
language:en
Short-container-title:Coatings

Author:

Lenshin Aleksandr S.¹²,Peshkov Yaroslav A.¹,Barkov Konstantin A.¹,Grechkina Margarita V.¹,Lukin Anatoliy N.¹,Kannykin Sergey V.¹,Minakov Dmitriy A.¹,Chernousova Olga V.²^ORCID

Affiliation:

1. Physical Department, Voronezh State University, 394000 Voronezh, Russia

2. Chemical Department, Voronezh State University of Engineering Technologies, 394000 Voronezh, Russia

Abstract

Porous silicon samples with a porosity index of 5% to 80% were obtained in this work by electrochemical etching, and their photoluminescence properties were also studied. The porosity index was calculated according to the data from X-ray reflectometry. The composition of the surface was controlled by ultra-soft X-ray spectroscopy and infrared (IR) spectroscopy. The degree of the sample surface oxidation increased with the porosity enhancement. Two known mechanisms of photoluminescence in porous silicon were detected that are related to the composition and morphology of its surface. The values of the porosity index specifying the dominations of these mechanisms were determined. Enhancement of photoluminescence was shown to be attributed to an increase in the porosity index.

Funder

Russian Science Foundation

Publisher

MDPI AG

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces

Link

https://www.mdpi.com/2079-6412/13/2/385/pdf

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