High-performance bifacial perovskite solar cells enabled by single-walled carbon nanotubes

Jing Zhang, Xian-Gang Hu, Kangyu Ji, Songru Zhao, Dongtao Liu, Bowei Li, Peng-Xiang Hou (), Chang Liu, Lirong Liu, Samuel D. Stranks, Hui-Ming Cheng (), S. Ravi P. Silva () and Wei Zhang ()
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Jing Zhang: University of Surrey
Xian-Gang Hu: Institute of Metal Research, Chinese Academy of Sciences
Kangyu Ji: University of Cambridge
Songru Zhao: Thomas Telford (AA) building, University of Surrey
Dongtao Liu: University of Surrey
Bowei Li: University of Surrey
Peng-Xiang Hou: Institute of Metal Research, Chinese Academy of Sciences
Chang Liu: Institute of Metal Research, Chinese Academy of Sciences
Lirong Liu: Thomas Telford (AA) building, University of Surrey
Samuel D. Stranks: University of Cambridge
Hui-Ming Cheng: University of Surrey
S. Ravi P. Silva: University of Surrey
Wei Zhang: University of Surrey

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract Bifacial perovskite solar cells have shown great promise for increasing power output by capturing light from both sides. However, the suboptimal optical transmittance of back metal electrodes together with the complex fabrication process associated with front transparent conducting oxides have hindered the development of efficient bifacial PSCs. Here, we present a novel approach for bifacial perovskite devices using single-walled carbon nanotubes as both front and back electrodes. single-walled carbon nanotubes offer high transparency, conductivity, and stability, enabling bifacial PSCs with a bifaciality factor of over 98% and a power generation density of over 36%. We also fabricate flexible, all-carbon-electrode-based devices with a high power-per-weight value of 73.75 W g−1 and excellent mechanical durability. Furthermore, we show that our bifacial devices have a much lower material cost than conventional monofacial PSCs. Our work demonstrates the potential of SWCNT electrodes for efficient, stable, and low-cost bifacial perovskite photovoltaics.

Date: 2024
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DOI: 10.1038/s41467-024-46620-1

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