Materials for the Active Layer of Organic Photovoltaics: Ternary Solar Cell Approach

Authors

  • Dr. Yung-Chung Chen,

    1. Institute of Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang Taipei, 115 Taiwan (ROC), Fax: (+886) 2-27831237
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  • Dr. Chih-Yu Hsu,

    1. Institute of Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang Taipei, 115 Taiwan (ROC), Fax: (+886) 2-27831237
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  • Ryan Yeh-Yung Lin,

    1. Institute of Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang Taipei, 115 Taiwan (ROC), Fax: (+886) 2-27831237
    2. Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106 Taiwan (ROC)
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  • Prof. Kuo-Chuan Ho,

    1. Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 106 Taiwan (ROC)
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  • Prof. Jiann T. Lin

    Corresponding author
    1. Institute of Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang Taipei, 115 Taiwan (ROC), Fax: (+886) 2-27831237
    • Institute of Chemistry, Academia Sinica, 128 Academia Road Sec. 2, Nankang Taipei, 115 Taiwan (ROC), Fax: (+886) 2-27831237
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Abstract

Power conversion efficiencies in excess of 7 % have been achieved with bulk heterojunction (BHJ)-type organic solar cells using two components: p- and n-doped materials. The energy level and absorption profile of the active layer can be tuned by introduction of an additional component. Careful design of the additional component is required to achieve optimal panchromatic absorption, suitable energy-level offset, balanced electron and hole mobility, and good light-harvesting efficiency. This article reviews the recent progress on ternary organic photovoltaic systems, including polymer/small molecule/functional fullerene, polymer/polymer/functional fullerene, small molecule/small molecule/functional fullerene, polymer/functional fullerene I/functional fullerene II, and polymer/quantum dot or metal/functional fullerene systems.

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