Isomerized Green Solid Additive Engineering for Thermally Stable and Eco-Friendly All-Polymer Solar Cells with Approaching 19% Efficiency

Bin Liu, Wan Xu, Ruijie Ma, Jin Woo Lee, Top Archie Dela Peña, Wanli Yang, Bolin Li, Mingjie Li, Jiaying Wu, Yimei Wang, Chao Zhang, Jie Yang, Junwei Wang, Shangbo Ning, Zhengfei Wang, Jianfeng Li, Hua Wang, Gang Li, Bumjoon J. Kim, Li NiuXugang Guo, Huiliang Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

Laboratory-scale all-polymer solar cells (all-PSCs) have exhibited remarkable power conversion efficiencies (PCEs) exceeding 19%. However, the utilization of hazardous solvents and nonvolatile liquid additives poses challenges for eco-friendly commercialization, resulting in the trade-off between device efficiency and operation stability. Herein, an innovative approach based on isomerized solid additive engineering is proposed, employing volatile dithienothiophene (DTT) isomers to modulate intermolecular interactions and facilitate molecular stacking within the photoactive layers. Through elucidating the underlying principles of the DTT-induced polymer assembly on molecular level, a PCE of 18.72% is achieved for devices processed with environmentally benign solvents, ranking it among the highest record values for eco-friendly all-PSCs. Significantly, such superiorities of the DTT-isomerized strategy afford excellent compatibility with large-area blade-coating techniques, offering a promising pathway for industrial-scale manufacturing of all-PSCs. Moreover, these devices demonstrate enhanced thermal stability with a promising extrapolated T80 lifetime of 14 000 h, further bolstering their potential for sustainable technological advancement.

Original languageEnglish
Article number2308334
JournalAdvanced Materials
Volume35
Issue number49
DOIs
Publication statusPublished - 7 Dec 2023

Keywords

  • all-polymer solar cells
  • device stability
  • green solvent processing
  • isomerized solid additive
  • morphology control

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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