Photoluminescence of metal oxides coated porous silicon

Authors

Catherine B. Tugado Materials Science and Engineering Program, University of the Philippines Diliman
Joybelle M. Lopez Materials Science and Engineering Program, University of the Philippines Diliman
Mary Grace M. Lanwang Materials Science and Engineering Program, University of the Philippines Diliman
Noel Jesus N. Oliver Materials Science and Engineering Program, University of the Philippines Diliman
Arven I. Cafe National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio National Institute of Physics, University of the Philippines Diliman
Armando S. Somintac National Institute of Physics, University of the Philippines Diliman

Abstract

Photoluminescence (PL) emission of porous silicon (PSi) coated with various metal oxides was investigated. PSi was fabricated through electrochemical etching in HF-ethanol solution. Metal oxides such as SnO₂ , ZnO and Cu_xO were deposited on porous layer via spray pyrolysis. Shift in interference peaks of reflectance spectra confirmed that the effective refractive indices of each sample changes as metal oxides were added. Different PL spectra were observed on the three samples. A shift in longer wavelength due to oxide defects was observed for SnO₂/PSi and ZnO/PSi since these are transparent at visible wavelengths. CuO/PSi PL peaks dropped and shifted towards longer wavelength due to absorption characteristics contributed by CuO.

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Issue

2016: Proceedings of the 34th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2016-PA-15

Section

Poster Session PA

Published

2016-08-18

How to Cite

[1]

CB Tugado, JM Lopez, MGM Lanwang, NJN Oliver, AI Cafe, AA Salvador, ES Estacio, and AS Somintac, Photoluminescence of metal oxides coated porous silicon, Proceedings of the Samahang Pisika ng Pilipinas 34, SPP-2016-PA-15 (2016). URL: https://proceedings.spp-online.org/article/view/SPP-2016-PA-15.