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Visible Electroluminescence from n-Type Porous Silicon/Electrolyte Solution Interfaces : Time-Dependent Electroluminescence Spectra

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Title: Visible Electroluminescence from n-Type Porous Silicon/Electrolyte Solution Interfaces : Time-Dependent Electroluminescence Spectra
Authors: Noguchi, Hidenori Browse this author
Kondo, Toshihiro Browse this author
Murakoshi, Kei Browse this author
Uosaki, Kohei Browse this author →KAKEN DB
Issue Date: 1999
Publisher: The Electrochemical Society
Journal Title: Journal of The Electrochemical Society
Volume: 146
Issue: 11
Start Page: 4166
End Page: 4171
Publisher DOI: 10.1149/1.1392608
Abstract: Visible electroluminescence (EL) from n-type porous silicon (n-PS) in an electrolyte solution containing S2O8^[2-] was investigated by potential-sweep and potential-step methods. Potential sweep measurements showed that both the cathodic current and EL intensity increased and the EL spectra blue-shifted as the potential became negative. These characteristics were further studied by the potential-step method. Immediately after the potential was stepped to a negative value, the cathodic current began to flow and EL was observed. The EL intensity then increased but the cathodic current decreased with time. The rate of the increase in the EL intensity depended not on the S2O8^[2-] concentrations but on the applied negative potentials. Time-resolved EL spectra measurements showed that the EL spectrum was blue-shifted with time even when a constant negative potential was applied to n-PS. These results were explained by considering that the emission site was changed from larger-sized Si crystallites to smaller-sized ones in the n-PS layer with time.
Rights: © The Electrochemical Society, Inc. 1999. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in J. Electrochem. Soc. 1999 volume 146, issue 11, 4166-4171.
Type: article
URI: http://hdl.handle.net/2115/50238
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 魚崎 浩平

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