Eco-friendly solvent-processed layer-by-layer ternary all-polymer solar cells exhibiting over 18.5% efficiency

Wenjing Xu, Hongyue Tian, Yuheng Ni, Yujie Xu, Lu Zhang, Fenghua Zhang, Sijian Wu, Sang Young Jeong, Tianhuan Huang, Xiaoyan Du, Xiong Li, Zaifei Ma, Han Young Woo, Jian Zhang, Xiaoling Ma, Jian Wang, Fujun Zhang

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

In this work, a series of eco-friendly solvent-processed all-polymer solar cells (APSCs) were fabricated by employing the sequentially spin-coating method. Two polymer donor materials PBQx-TCl and PM6 were deliberately selected due to their similar chemical structure, preferring to form the alloyed state for better exciton dissociation and hole transport in the layer-by-layer (LbL) APSCs. The better exciton dissociation between PBQx-TCl and PM6 can be confirmed from PL spectra of neat and blend films, as well as the short-circuit current densities (JSC) of special cells without acceptor layer. The optimized ternary LbL APSCs with 30 wt% PM6 in donor layer exhibit the power conversion efficiency (PCE) of 18.55 %, originating from the simultaneously improved JSC of 25.16 mA cm−2, open-circuit voltage (VOC) of 0.966 V, and fill factor of 76.33 %. The increased VOC of ternary LbL APSCs is mainly attributed to the decreased energy loss due to the good compatibility of the two polymer donors. The PCE of 18.55 % should be among the highest value for LbL APSCs processed by eco-friendly solvent.

Original languageEnglish
Article number152558
JournalChemical Engineering Journal
Volume493
DOIs
Publication statusPublished - 2024 Aug 1

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

  • All-polymer solar cells
  • Eco-friendly solvent
  • Layer-by-layer
  • Power conversion efficiency
  • Ternary

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering

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