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Hybrid Materials

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Emerging Science

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2299-3940
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A Non-Oxidative Approach Towards Hybrid Silicon Nanowire- Based Solar Cell Heterojunctions

Muhammad Y. Bashouti / Jürgen Ristein / Hossam Haick
  • The Department of Chemical Engineering and Russell Berrie Nanotechnology Institute,Technion – Israel Institute of Technology, Haifa 32000, Israel
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Silke Christiansen
  • Max-Planck-Institute for the Scienceof Light, Günther-Scharowsky-Str. 1, D-91058 Erlangen
  • Institute of Nanoarchitectures for Solar Energy Conversion, Helmholtz-Center Berlin (HZB) Hahn-Meitner-Platz 1, D-14109 Berlin
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2013-06-10 | DOI: https://doi.org/10.2478/hyma-2013-0002

Abstract

A general method for the non-oxidative termination of silicon nanowires (Si NWs) is reviewed. Oxide-free Si NW have been successfully alkylated in the lab using a two-step chlorination/alkylation process. The distinctive properties of the resulting Si NW have been taken advantage of by integrating the Si NWs into functional devices such as solar cells. Moreover, molecularly terminated Si NWs exhibit lower defect density emissions than unmodified Si NWs. This, in part, explains the better performance of the molecularly terminated Si NW-based solar cells. Solar cells that use organic-inorganic hybrid Si NWs as absorbers show an increased open-circuit voltage (Voc), an increased short-circuit current (Jsc) and a higher fill factor (FF). The aim of chemical functionalization is to protect Si NWs from extensive oxidation, add functionality and to adjust surface electronic properties such as the work function, surface Fermi level and band bending. The stability of the terminated of Si NWs was found to be dependent on the molecular chain length, molecular coverage, interaction type (π-π or σ-σ), surface energy and Si NW diameter.

Keywords: Silicon Nanowire; Oxide Free Silicon; Two-Step Process Chlorination/Alkylation Process; Hybrid Solar Cell; Oxidation Resistance; Photoemission; Heterojunction

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About the article

Published Online: 2013-06-10

Published in Print: 2014-01-01


Citation Information: Hybrid Materials, ISSN (Online) 2299-3940, DOI: https://doi.org/10.2478/hyma-2013-0002.

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©2013 Muhammad Y. Bashouti et al.. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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