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Issue 36, 2017
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Aqueous-solution-processable metal oxides for high-performance organic and perovskite solar cells

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Abstract

Poly(3,4-ethylene dioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) is a widely utilized hole-transporting material (HTM) in planar photovoltaic devices, such as organic solar cells (OSCs) and perovskite solar cells (PSCs). However, the hygroscopic nature of PEDOT:PSS aqueous dispersions may restrict their future application. Therefore, it is necessary to develop other effective and stable HTMs to achieve high-performance photovoltaic devices. Herein, we demonstrate a facile route to deposit solution-processed MoO3, GeO2, V2O5 and CrO3 thin films as hole-transporting layers by directly dissolving their commercial powders in deionized water. Among these, the solution-processed V2O5 (sV2O5) film exhibited the highest work function of 5.2 eV, and the best hydrophobicity, with a contact angle of 77.2°. The sV2O5-based OSCs and PSCs presented power conversion efficiencies (PCEs) of 8.36% and 14.13%, respectively. Notably, the PEDOT:PSS V2O5 composite HTM based device obtained a maximum PCE of 18.03% with a Voc exceeding 1.0 V. These aqueous-solution-processed HTMs have potential applications in green and low-cost photovoltaic devices by virtue of their simple and ecofriendly preparations.

Graphical abstract: Aqueous-solution-processable metal oxides for high-performance organic and perovskite solar cells

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Publication details

The article was received on 29 Jun 2017, accepted on 18 Aug 2017 and first published on 18 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR04692H
Citation: Nanoscale, 2017,9, 13506-13514
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    Aqueous-solution-processable metal oxides for high-performance organic and perovskite solar cells

    Y. Lou and Z. Wang, Nanoscale, 2017, 9, 13506
    DOI: 10.1039/C7NR04692H

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