Reflectance improvement by thermal annealing of sputtered Ag/ZnO back reflectors in a-Si:H thin film silicon solar cells

Franz-Josef Haug, Karin Söderström, Céline Pahud, Rémi Biron, Jordi Escarré, Martial Duchamp, Rafal E. Dunin-Borkowski, Christophe Ballif

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    Silver can be used as the back contact and reflector in thin film silicon solar cells. When deposited on textured substrates, silver films often exhibit reduced reflectance due to absorption losses by the excitation of surface plasmon resonances. We show that thermal annealing of the silver back reflector increases its reflectance drastically. The process is performed at low temperature (150°C) to allow the use of plastic sheets such as polyethylene naphthalate and increases the efficiency of single junction amorphous solar cells dramatically. We present the best result obtained on a flexible substrate: a cell with 9.9% initial efficiency and 15.82 mA/cm2 in short circuit current is realized in n-i-p configuration. © 2011 Materials Research Society.
    Original languageEnglish
    JournalMaterials Research Society Symposium Proceedings
    Volume1321
    Pages (from-to)63-68
    ISSN0272-9172
    DOIs
    Publication statusPublished - 2011
    Event2011 MRS Spring Meeting - San Francisco, California, USA
    Duration: 1 Jan 2011 → …

    Conference

    Conference2011 MRS Spring Meeting
    CitySan Francisco, California, USA
    Period01/01/2011 → …

    Cite this

    Haug, F-J., Söderström, K., Pahud, C., Biron, R., Escarré, J., Duchamp, M., Dunin-Borkowski, R. E., & Ballif, C. (2011). Reflectance improvement by thermal annealing of sputtered Ag/ZnO back reflectors in a-Si:H thin film silicon solar cells. Materials Research Society Symposium Proceedings, 1321, 63-68. https://doi.org/10.1557/opl.2011.812