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Polymer solar cells employing conjugated polyelectrolytes with different countercations

  • Yueqin ShiEmail author
  • Enxiang Yang
  • Jun Zhang
  • Zhenguo Ji
Original Contribution
  • 13 Downloads

Abstract

Conjugated polyelectrolytes based on benzotriazole (BT) and benzothiadiazole (BTz) alt unit with a pendant sulfonate ion but different countercations were synthesized and named PBTBTz-SO3Na and PBTBTz-SO3TBA. PBTBTz-SO3Na was used as a cathode interface applied to polymer solar cells (PSCs), and ITO/PEDOT:PSS/active layer/cathode interlayer/Al was set as a device structure. The PSCs displayed an average power conversion efficiency (PCE) of 7.7%, revealing an unchanged efficiency in comparison with that of the control device fabricated from a CH3OH interlayer. TBA+, a different counteraction, was used instead of Na+ to further study the influence of counterions on the electrical property of PBTBTz-SO3. PBTBTz-SO3TBA was used as a cathode interface to fabricate two types of PSCs based on PTB7:PC71BM and PBDB-T:ITIC, and their improved average PCEs were 8.6% and 9.1%, respectively.

Keywords

Conjugated polyelectrolytes Interlayer Different countercations Polymer solar cells Power conversion efficiency 

Notes

Acknowledgments

This work was supported by National Natural Science Foundation of China (51703045). The author would like to thank Hangzhou Dianzi University for the funding KYS205617011 to support this research.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interest.

Supplementary material

396_2019_4550_MOESM1_ESM.docx (327 kb)
ESM 1 (DOCX 327 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yueqin Shi
    • 1
    Email author
  • Enxiang Yang
    • 1
  • Jun Zhang
    • 1
  • Zhenguo Ji
    • 1
  1. 1.College of Materials & Environmental EngineeringHangzhou Dianzi UniversityHangzhouPeople’s Republic of China

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