Investigation of the relationship between porosity and luminescent properties of porous silicon

Alexander S. Lenshin; Yaroslav A. Peshkov; Olga V. Chernousova; Sergey V. Kannykin; Dmitry A. Minakov

doi:10.1051/epjap/2023230001

EPJ

Investigation of the relationship between porosity and luminescent properties of porous silicon

Alexander S. Lenshin¹^,2, Yaroslav A. Peshkov¹^*, Olga V. Chernousova², Sergey V. Kannykin¹ and Dmitry A. Minakov¹

¹ Voronezh State University, 394018 Voronezh, Russia
² Voronezh State University of Engineering Technologies, 394036 Voronezh, Russia

Received: 2 January 2023
Received in final form: 26 February 2023
Accepted: 28 February 2023
Published online: 24 May 2023

Abstract

In this work, we obtained porous silicon with different porosity by electrochemical etching and studied their photoluminescence. Two well-known photoluminescence mechanisms of porous silicon related to the composition and morphology of the surface have been discovered, and it has been established at what porosity values they prevail. It is shown that an increase in the porosity index leads to an increase in the intensity of photoluminescence.