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

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.

Publication DOI: https://doi.org/10.1038/s41598-018-35210-z
Divisions: College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: 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/.
Publication ISSN: 2045-2322
Last Modified: 08 Jan 2024 08:54
Date Deposited: 26 Nov 2018 11:14
Full Text Link:
Related URLs: https://www.nat ... 598-018-35210-z (Publisher URL)
PURE Output Type: Article
Published Date: 2018-11-21
Accepted Date: 2018-10-26
Authors: He, Wei
Wu, Rihan
Yurkevich, Igor V. (ORCID Profile 0000-0003-1447-8913)
Canham, Leigh T.
Kaplan, Andrey

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