Electrochemical deposition of buried contacts in high-efficiency crystalline silicon photovoltaic cells

Jens Arne Dahl Jensen, Per Møller, Tim Bruton, Nigel Mason, Richard Russell, John Hadley, Peter Verhoeven, Alan Matthewsone

    Research output: Contribution to journalJournal articleResearchpeer-review

    746 Downloads (Pure)

    Abstract

    This article reports on a newly developed method for electrochemical deposition of buried Cu contacts in Si-based photovoltaic ~PV! cells. Contact grooves, 20 mm wide by 40 mm deep, were laser-cut into Si PV cells, hereafter applied with a thin electroless NiP base and subsequently filled with Cu by electrochemical deposition at a rate of up to 10 mm per min. With the newly developed process, void-free, superconformal Cu-filling of the laser-cut grooves was observed by scanning electron microscopy and focused ion beam techniques. The Cu microstructure in grooves showed both bottom and sidewall texture, with a grain-size decreasing from the center to the edges of the buried Cu contacts and a pronounced lateral growth outside the laser-cut grooves. The measured specific contact resistances of the buried contacts was better than the production standard. Overall performance of the new PV cells was equal to the production standard with measured efficiencies up to 16.9%.
    Original languageEnglish
    JournalJournal of The Electrochemical Society
    Volume150
    Issue number1
    Pages (from-to)G49-G57
    ISSN0013-4651
    DOIs
    Publication statusPublished - 2003

    Bibliographical note

    Copyright The Electrochemical Society, Inc. [2003]. 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).

    Keywords

    • Materials technology
    • Micro Technology
    • Processing technology

    Fingerprint Dive into the research topics of 'Electrochemical deposition of buried contacts in high-efficiency crystalline silicon photovoltaic cells'. Together they form a unique fingerprint.

    Cite this