Reconstructing charge-carrier dynamics in porous silicon membranes from time-resolved interferometric measurements

Wei He, Rihan Wu, Igor V. Yurkevich, Leigh T. Canham, Andrey Kaplan

Research output: Contribution to journalArticle

Abstract

We performed interferometric time-resolved simultaneous reflectance and transmittance measurements to investigate the carrier dynamics in pump-probe experiments on thin porous silicon membranes. The experimental data was analysed by using a method built on the Wentzel-Kramers-Brillouin approximation and the Drude model, allowing us to reconstruct the excited carriers’ non-uniform distribution in space and its evolution in time. The analysis revealed that the carrier dynamics in porous silicon, with ~50% porosity and native oxide chemistry, is governed by the Shockley-Read-Hall recombination process with a characteristic time constant of 375 picoseconds, whereas diffusion makes an insignificant contribution as it is suppressed by the high rate of scattering.
Original languageEnglish
Article number17172
JournalScientific Reports
Volume8
Issue number1
DOIs
Publication statusPublished - 21 Nov 2018

Bibliographical note

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

Fingerprint Dive into the research topics of 'Reconstructing charge-carrier dynamics in porous silicon membranes from time-resolved interferometric measurements'. Together they form a unique fingerprint.

  • Cite this