Multifunctional Effect of p-Doping, Antireflection, and Encapsulation by Polymeric Acid for High Efficiency and Stable Carbon Nanotube-Based Silicon Solar Cells

Yang Qian, Il Jeon, Ya Lun Ho, Changhyun Lee, Sujeong Jeong, Clement Delacou, Seungju Seo, Anton Anisimov, Esko I. Kaupinnen, Yutaka Matsuo, Yoonmook Kang, Hae Seok Lee, Donghwan Kim, Jean Jacques Delaunay, Shigeo Maruyama

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)


Silicon solar cells among different types of solar energy harvesters have entered the commercial market owing to their high power conversion efficiency and stability. By replacing the electrode and the p-type layer by a single layer of carbon nanotubes, the device can be further simplified. This greatly augments the attractiveness of silicon solar cells in the light of raw material shortages and the solar payback period, as well as lowering the fabrication costs. However, carbon nanotube-based silicon solar cells still lack device efficiency and stability. These can be improved by chemical doping, antireflection coating, and encapsulation. In this work, the multifunctional effects of p-doping, antireflection, and encapsulation are observed simultaneously, by applying a polymeric acid. This method increases the power conversion efficiency of single-walled carbon nanotube-based silicon solar cells from 9.5% to 14.4% and leads to unprecedented device stability of more than 120 d under severe conditions. In addition, the polymeric acid-applied carbon nanotube-based silicon solar cells show excellent chemical and mechanical robustness. The obtained stable efficiency stands the highest among the reported carbon nanotube-based silicon solar cells.

Original languageEnglish
Article number1902389
JournalAdvanced Energy Materials
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Funding Information:
The authors gratefully acknowledge the Research and Education Consortium for Innovation of Advanced Integrated Science by Japan Science and Technology (JST) and Japan Society for the Promotion of Science (JSPS) KAKENHI grant numbers JP15H05760, JP16H02285, JP17K04970, JP18H05329, JP19J12932, and 19K15669. I.J. thanks Yashima foundation for financial support. A part of this work was supported by “Nanotechnology Platform” (project no. 12024046) of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan.

Publisher Copyright:
© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


  • Nafion
  • antireflection
  • carbon nanotubes
  • doping
  • silicon solar cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • General Materials Science


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