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Issue 4, 2018
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Fullerene derivative with a branched alkyl chain exhibits enhanced charge extraction and stability in inverted planar perovskite solar cells

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Abstract

Fullerene derivatives are known for their excellent electron transport properties, which can effectively serve as electron transport layers (ETLs) deposited from solution at low temperatures in perovskite solar cells (PSCs). However, it remains unclear how functional groups attached to the fullerene derivatives influence device performances. Herein, the performance of an ETL based on [6,6]-phenyl-C61 butyric acid 2-ethylhexyl ester (PC61BEH) was investigated. It was demonstrated that the branched alkyl chain of the fullerene derivative can highly influence the solubility, film morphology, passivation ability, ETL-perovskite contact, and electron extraction ability of the fullerene derivative. Overall device performance and stability are dependent on these characteristics. The results suggest that further design and improvement of fullerene-based PSCs performance may be possible through optimization of the addend structure and functionality.

Graphical abstract: Fullerene derivative with a branched alkyl chain exhibits enhanced charge extraction and stability in inverted planar perovskite solar cells

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Publication details

The article was received on 19 Dec 2017, accepted on 18 Jan 2018 and first published on 19 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ04978A
New J. Chem., 2018,42, 2896-2902

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    Fullerene derivative with a branched alkyl chain exhibits enhanced charge extraction and stability in inverted planar perovskite solar cells

    C. Tian, E. Castro, G. Betancourt-Solis, Z. Nan, O. Fernandez-Delgado, S. Jankuru and L. Echegoyen, New J. Chem., 2018, 42, 2896
    DOI: 10.1039/C7NJ04978A

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