Fullerene derivative anchored SnO2 for high-performance perovskite solar cells

Kuan Liu, Shuang Chen, Jionghua Wu, Huiyin Zhang, Minchao Qin, Xinhui Lu, Yingfeng Tu, Qingbo Meng, Xiaowei Zhan

    Research output: Journal article publicationJournal articleAcademic researchpeer-review

    189 Citations (Scopus)

    Abstract

    A fullerene derivative, 9-(1-(6-(3,5-bis(hydroxymethyl)phenoxy)-1-hexyl)-1H-1,2,3-triazol-4-yl)-1-nonyl [60]fullerenoacetate (C9), is employed to anchor the surface of a SnO2 electron transport layer (ETL) in planar heterojunction perovskite solar cells (PSCs). C9 suppresses charge recombination due to efficient passivation of oxygen-vacancy-related defects on the surface of the SnO2 ETL through the formation of a Lewis adduct between the under-coordinated Sn in SnO2 and hydroxyl terminal groups in C9. The C9 modifying layer enhances the extraction of photogenerated charge carriers due to the negligible injection barrier and strong electron affinity. C9 can also improve the quality of the perovskite film with enlarged grain size, reduced grain boundary and improved crystallinity. The PSCs based on C9-modified SnO2 exhibit improved photovoltaic performance with efficiency up to 21.3% with negligible hysteresis, which is superior to the control devices based on bare SnO2 (20.0%). Moreover, the ambient, photo and electric-field stability of the modified devices is also enhanced.

    Original languageEnglish
    Pages (from-to)3463-3471
    Number of pages9
    JournalEnergy and Environmental Science
    Volume11
    Issue number12
    DOIs
    Publication statusPublished - Dec 2018

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Renewable Energy, Sustainability and the Environment
    • Nuclear Energy and Engineering
    • Pollution

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