A Wide Bandgap Polymer with Strong Π–Π Interaction for Efficient Fullerene-Free Polymer Solar Cells

Huifeng Yao, Runnan Yu, Tae Joo Shin, Hao Zhang, Shaoqing Zhang, Bomee Jang, Mohammad Afsar Uddin, Han Young Woo, Jianhui Hou

    Research output: Contribution to journalArticlepeer-review

    76 Citations (Scopus)

    Abstract

    A novel wide-bandgap polymer donor PBDTS-DTBTO, which shows an optical bandgap of 1.76 eV and a strong Π–Π interaction feature. Power conversion efficiency reached over 9% in the fullerene-free polymer solar cells (PSC) device By using a low-bandgap acceptor ITIC, indicating complementary absoprtion spectra for the donor and acceptor are of great importance for achieving a highly efficient fullerene-free PSC device. Additionally, the PSC devices fabricated by PBDTS-DTBTO:ITIC showed relatively small sensitivity to variations of the active layer thickness, and PCE equal to 8% could be achieved when the active layer thicknesses range from 50 to 200 nm, suggesting it is a promising candidate for further practical production study of fullerene-free PSC.

    Original languageEnglish
    JournalAdvanced Energy Materials
    Volume6
    Issue number15
    DOIs
    Publication statusPublished - 2016 Aug 10

    Keywords

    • active layer thickness
    • complementary absorption
    • polymer solar cells
    • strong π–π interaction
    • wide bandgap polymers

    ASJC Scopus subject areas

    • Renewable Energy, Sustainability and the Environment
    • General Materials Science

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