Novel diyne-bridged dyes for efficient dye-sensitized solar cells

Jing Kun Fang, Tengxiao Sun, Yi Tian, Yingjun Zhang, Chuanfei Jin, Zhimin Xu, Yu Fang, Xiangyu Hu, Haobin Wang

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    Three new metal free organic dyes (FSD101-103) were synthesized to investigate the influence of diyne unit on dye molecules. FSD101 and FSD102 with diyne unit and FSD103 with monoyne unit were applied as sensitizers in the dye-sensitized solar cells (DSSCs). The optical and electrochemical properties, theoretical studies, and photovoltaic parameters of DSSCs sensitized by these dyes were systematically investigated. By replacing the monoyne unit with a diyne unit, FSD101 exhibited broader absorption spectrum, lower IP, higher EA, lower band gap energy, higher oscillator strength, more efficient electron injection ability, broader IPCE response range and higher τe in comparison with FSD103. Hence, DSSC sensitized by FSD101 showed higher Jsc and Voc values, and demonstrated a power conversion efficiency of 3.12%, about 2-fold as that of FSD103 (1.55%). FSD102 showed similar results as FSD101, with a power conversion efficiency of 2.98%, despite a stronger electron withdraw cyanoacrylic acid group was introduced. This may be due to the lower efficiency of the electron injection from dye to TiO2 and lower τe of FSD102 than that of FSD101. These results indicate that the performance of DSSCs can be significantly improved by introducing a diyne unit into this type of organic dyes.

    Original languageEnglish
    Pages (from-to)1-9
    Number of pages9
    JournalMaterials Chemistry and Physics
    Volume195
    DOIs
    Publication statusPublished - 2017 Jul 1

    Keywords

    • Anthracene
    • Diyne
    • Dye-sensitized solar cells
    • Organic dyes
    • Photovoltaic performances

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

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