journal article·2021-09-08

Conductive Ionenes Promote Interfacial Self-Doping for Efficient Organic Solar Cells

Ming Liu, Mengyang Li, Yufeng Jiang, Zaifei Ma, Duanzijing Liu, Zhongjie Ren, Thomas P. Russell, Yao Liu

ACS Applied Materials & Interfaces· Volume 13· Issue 35
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Abstract

Conductive ionenes were synthesized by integrating the electron donor dialkoxynaphthalene (DAN) with the electron acceptor naphthalene diimide (NDI) using the Menshutkin reaction. The crystallinity and morphology of the films of these polymers can be optimized by varying the DAN-to-NDI ratio. These ionenes show strong charge transfer from DAN to NDI, though absent conjugated backbones, affording self-doping polymers with enhanced π-π interactions and excellent electronic properties. This is the first example where an electron donor can dope the electron acceptor in nonconjugated polymers, opening a new avenue for designing efficient interlayer materials. These ionenes markedly modify the electrode interface and promote efficient interfacial self-doping to boost the performance of fullerene-based, non-fullerene-based, and ternary organic solar cells, affording high power conversion efficiencies over a wide range of interlayer thicknesses, from ∼8 to ∼40 nm, with a maximum efficiency of 17.05%.
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Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Beijing Advanced Innovation Center for Soft Matter, Science and Engineering, State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Center for Advanced Low-dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, P. R. China

Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States

Polymer Science and Engineering Department, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States

Funding

Office of Naval Research · National Natural Science Foundation of China

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