Temperature-dependent photoluminescence spectroscopy of silicon nanowires grown via silver assisted chemical etching

Authors

Alexander De Los Reyes National Institute of Physics, University of the Philippines Diliman
Eloise Anguluan National Institute of Physics, University of the Philippines Diliman
John Daniel Vasquez National Institute of Physics, University of the Philippines Diliman
Joselito Muldera National Institute of Physics, University of the Philippines Diliman
Philippe Martin Tingzon National Institute of Physics, University of the Philippines Diliman
Arvin Mabilangan National Institute of Physics, University of the Philippines Diliman
Joseph Christopher Ragasa National Institute of Physics, University of the Philippines Diliman
Elmer Estacio National Institute of Physics, University of the Philippines Diliman
Arnel Salvador National Institute of Physics, University of the Philippines Diliman
Armando Somintac National Institute of Physics, University of the Philippines Diliman

Abstract

We investigate the temperature-dependence of the photoluminescence (PL) bands in silicon nanowires (SiNWs) grown via silver-assisted chemical etching. SINWs were grown from B-doped p-type (100) silicon substrates via silver-assisted chemical etching. Scanning electron micrographs confirmed the presence of SINWs approximately 3 microns in length. Temperature-dependent PL results revealed the presence of two peaks at E₁ ≈ 1.88 eV and E₂ ≈ 2.18 eV. These peaks do not obey the temperature dependence of semiconductors as suggested by the Varshni equation. Furthermore, anomalous thermal quenching was observed for several temperature values. In summary, we attribute the origin of these photoluminescence bands to defect sites in the Si/SiO₂ interface rather than spatial confinement effects.

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Issue

2015: Proceedings of the 33rd Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2015-PB-26

Section

Poster Session PB

Published

2015-06-03

How to Cite

[1]

A De Los Reyes, E Anguluan, JD Vasquez, J Muldera, PM Tingzon, A Mabilangan, JC Ragasa, E Estacio, A Salvador, and A Somintac, Temperature-dependent photoluminescence spectroscopy of silicon nanowires grown via silver assisted chemical etching, Proceedings of the Samahang Pisika ng Pilipinas 33, SPP-2015-PB-26 (2015). URL: https://proceedings.spp-online.org/article/view/1232.