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Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%

Author

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  • Nicola Gasparini

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg)

  • Xuechen Jiao

    (North Carolina State University)

  • Thomas Heumueller

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg)

  • Derya Baran

    (Imperial College London)

  • Gebhard J. Matt

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg)

  • Stefanie Fladischer

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg
    Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander-University Erlangen-Nuremberg)

  • Erdmann Spiecker

    (Center for Nanoanalysis and Electron Microscopy (CENEM), Friedrich-Alexander-University Erlangen-Nuremberg)

  • Harald Ade

    (North Carolina State University)

  • Christoph J. Brabec

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg
    Bavarian Center for Applied Energy Research (ZAE Bayern))

  • Tayebeh Ameri

    (Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg)

Abstract

In recent years the concept of ternary blend bulk heterojunction (BHJ) solar cells based on organic semiconductors has been widely used to achieve a better match to the solar irradiance spectrum, and power conversion efficiencies beyond 10% have been reported. However, the fill factor of organic solar cells is still limited by the competition between recombination and extraction of free charges. Here, we design advanced material composites leading to a high fill factor of 77% in ternary blends, thus demonstrating how the recombination thresholds can be overcome. Extending beyond the typical sensitization concept, we add a highly ordered polymer that, in addition to enhanced absorption, overcomes limits predicted by classical recombination models. An effective charge transfer from the disordered host system onto the highly ordered sensitizer effectively avoids traps of the host matrix and features an almost ideal recombination behaviour.

Suggested Citation

  • Nicola Gasparini & Xuechen Jiao & Thomas Heumueller & Derya Baran & Gebhard J. Matt & Stefanie Fladischer & Erdmann Spiecker & Harald Ade & Christoph J. Brabec & Tayebeh Ameri, 2016. "Designing ternary blend bulk heterojunction solar cells with reduced carrier recombination and a fill factor of 77%," Nature Energy, Nature, vol. 1(9), pages 1-9, September.
    • Handle: RePEc:nat:natene:v:1:y:2016:i:9:d:10.1038_nenergy.2016.118
    DOI: 10.1038/nenergy.2016.118
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    Cited by:

    1. Yuming Wang & Jianwei Yu & Rui Zhang & Jun Yuan & Sandra Hultmark & Catherine E. Johnson & Nathaniel P. Gallop & Bernhard Siegmund & Deping Qian & Huotian Zhang & Yingping Zou & Martijn Kemerink & Art, 2023. "Origins of the open-circuit voltage in ternary organic solar cells and design rules for minimized voltage losses," Nature Energy, Nature, vol. 8(9), pages 978-988, September.

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