Improved performance and life time of inverted organic photovoltaics by using polymer interfacial materials

Zandra George, Eszter Voroshazi, Camilla Lindqvist, Renee Kroon, Wenliu Zhuang, Ergang Wang, Patrik Henriksson, Afshin Hadipour, Mats R. Andersson

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)

    Abstract

    A previously published fluorene based interlayer polymer is here compared to three similar polymers where the fluorene monomer has been exchanged with monomers that have been reported to have a higher photo-chemical stability. The polymer interlayers have been studied in terms of their influence on device performance and stability on inverted devices with an active layer of P3HT:PC61BM. By acting as a hole-blocking layer the polymers are able to increase the efficiency of the devices with ~50% compared to devices with an ITO cathode. In addition, the polymers also improve the photo-stability of the devices, mainly as an effect of a reduced decrease in open-circuit voltage and fill factor. This indicates that solution processable polymer interlayers could be a way towards both higher efficiency and improved stability of inverted organic solar cells.

    Original languageEnglish
    Pages (from-to)99-104
    Number of pages6
    JournalSolar Energy Materials and Solar Cells
    Volume133
    DOIs
    Publication statusPublished - 2015

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