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Fullerene-Free Molecular Acceptors for Organic Photovoltaics

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Advances in Solar Energy Research

Part of the book series: Energy, Environment, and Sustainability ((ENENSU))

Abstract

Solution-processed bulk-heterojunction solar cells (BHJSCs) are the focus of photovoltaic research for the last 20 years due to new materials development, bandgap tunability through molecular design, high efficiency, and cost-effective fabrication and optimization. Much attention has been paid to the design and development of donor materials whereas the development of new electron accepting materials is at its infancy. For a long time fullerene and its derivatives have dominated the field as electron acceptor materials. In last few years, a significant progress has been made towards the development of fullerene-free acceptors (FFA) which in combination with conjugated polymers/oligomers as the donors reached power conversion efficiencies (PCE) up to 14% and exceed those of the fullerene-based OSCs. These sharp growth in PCE makes OSCs as one of the fastest growing solar technology. Specifically, in these devices the choice of FFAs and corresponding complementary donor materials plays critical role in achieving high efficiencies. This chapter summarizes recent development in the design principles of FFAs for BHJSCs. The role of FFAs in binary and ternary devices is discussed as a way to improve the device performance. A special attention is paid to the structure-activity relationships with the device performance and an approach for efficiency enhancement of OSCs.

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Acknowledgements

The authors would like to acknowledge Department of Science and Technology (DST), New Delhi (DST/TMD/SERI/D05) for financial support.

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  1. School of Chemistry, Sambalpur University, Jyoti Vihar, 768019, Sambalpur, India

    Amaresh Mishra & Satya Narayan Sahu

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  1. Amaresh Mishra
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  2. Satya Narayan Sahu
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Correspondence to Amaresh Mishra .

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  1. Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, India

    Himanshu Tyagi

  2. Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India

    Avinash Kumar Agarwal

  3. Department of Mechanical Engineering, Indian Institute of Technology Jodhpur, Jodhpur, Rajasthan, India

    Prodyut R. Chakraborty

  4. Department of Mechanical Engineering, Indian Institute of Technology Mandi, Mandi, Himachal Pradesh, India

    Satvasheel Powar

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Mishra, A., Sahu, S.N. (2019). Fullerene-Free Molecular Acceptors for Organic Photovoltaics. In: Tyagi, H., Agarwal, A., Chakraborty, P., Powar, S. (eds) Advances in Solar Energy Research. Energy, Environment, and Sustainability. Springer, Singapore. https://doi.org/10.1007/978-981-13-3302-6_8

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