Design of Near-Infrared Nonfullerene Acceptor with Ultralow Nonradiative Voltage Loss for High-Performance Semitransparent Ternary Organic Solar Cells

Wuyue Liu; Shaoming Sun; Liang Zhou; Yong Cui; Wenkai Zhang; Jianhui Hou; Feng Liu; Shengjie Xu; Xiaozhang Zhu

doi:10.1002/anie.202116111

Design of Near-Infrared Nonfullerene Acceptor with Ultralow Nonradiative Voltage Loss for High-Performance Semitransparent Ternary Organic Solar Cells

Angew Chem Int Ed Engl. 2022 May 2;61(19):e202116111. doi: 10.1002/anie.202116111. Epub 2022 Jan 14.

Authors

Wuyue Liu^{1

2}, Shaoming Sun^{1

2}, Liang Zhou³, Yong Cui⁴, Wenkai Zhang³, Jianhui Hou⁴, Feng Liu^{1

5}, Shengjie Xu¹, Xiaozhang Zhu^{1

2}

Affiliations

¹ Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
² School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
³ Department of Physics and Applied Optics Beijing Area Major Laboratory Center for Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, P. R. China.
⁴ Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.
⁵ School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, P. R. China.

PMID: 34962046
DOI: 10.1002/anie.202116111

Abstract

Semitransparent organic solar cells (ST-OSCs) are considered as one of the most valuable applications of OSCs and a strong contender in the market. However, the optical band gap of current high-performance ST-OSCs is still not low enough to achieve the optimal balance between power conversion efficiency (PCE) and average visible transmittance (AVT). An N-substituted asymmetric nonfullerene acceptor SN with over 40 nm bathochromically shifted absorption compared to Y6 was designed and synthesized, based on which the device with PM6 as donor obtained a PCE of 14.3 %, accompanied with a nonradiative voltage loss as low as 0.15 eV. Meanwhile, ternary devices with the addition of SN into PM6 : Y6 can achieve a PCE of 17.5 % with an unchanged open-circuit voltage and improved short-circuit current. Benefiting from extended NIR absorption and lowered voltage loss, ST-OSCs based on PM6 : SN : Y6 were fabricated and the optimized device demonstrated a PCE of 14.0 % at an AVT of 20.2 %, which is the highest PCE at an AVT over 20 %.

Keywords: Near-infrared; Nonfullerene Acceptor; Nonradiative Voltage Loss; Power Conversion Efficiency; Semitransparent Organic Solar Cells.

Abstract

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