Novel light trapping scheme for thin crystalline cells utilizing deep structures on both wafer sides [solar cells].

Anders Michael Jørgensen, Thomas Clausen, Otto Leistiko

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    389 Downloads (Pure)

    Abstract

    A new light trapping structure is presented with trapping capabilities comparable to or better than those of the perpendicular grooves structure. The new structure traps a larger fraction of rays for 8-80 passes than the perpendicular grooves structure. The average path length enhancement is about 62 times the average thickness. The structure consists of deep (-200 μm) inverted pyramids on the front side and deep (-200 μm) truncated pyramids with eight sides on the back. The structure is realized in crystalline silicon by wet chemical etching using potassium hydroxide (KOH) and isopropanol (IPA). A process for creating thin solar cells with this light trapping scheme is described. The process includes only two main photolithographic steps and features a self-aligned front metallization. The process uses 250 μm wafers to create cells that on average are about 70 μm thick
    Original languageEnglish
    Title of host publicationPhotovoltaic Specialists Conference, 1997., Conference Record of the Twenty-Sixth IEEE
    PublisherIEEE
    Publication date1998
    Pages263-266
    ISBN (Print)0-7803-3767-0
    DOIs
    Publication statusPublished - 1998
    EventConference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference. -
    Duration: 1 Jan 1997 → …

    Conference

    ConferenceConference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference.
    Period01/01/1997 → …

    Bibliographical note

    Copyright: 1997 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE

    Fingerprint

    Dive into the research topics of 'Novel light trapping scheme for thin crystalline cells utilizing deep structures on both wafer sides [solar cells].'. Together they form a unique fingerprint.

    Cite this