Roll-to-roll micro-gravure printed P3HT:PCBM organic solar cells

Hengyue Li*, Chujun Zhang, Junfeng Wei, Keqing Huang, Xiaotong Guo, Yu Yang, Shu Kong SO, Qun Luo, Chang Qi Ma, Junliang Yang

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

11 Citations (Scopus)


Roll-to-roll (R2R) micro-gravure printing is an attractive technology for fabricating organic solar cells (OSCs) at low cost with high throughput. The nanoscale morphology and phase separation of R2R micro-gravure printed active layers have a large influence on the photovoltaic performance of OSCs. Herein, we demonstrate that the photovoltaic performance of R2R micro-gravure printed P3HT:PCBM OSCs can be enhanced by optimizing phase separation using solvent engineering. R2R micro-gravure printed P3HT:PCBM blend film with chlorobenzene solvent enabled optimized phase separation and formation of a fine-tuned interpenetrating network in a bulk heterojunction (BHJ) layer compared with a film with 1,2-dicholorobenzene solvent. This creates an optimal transport pathway and therefore effectively enhances charge transport in the BHJ blend film and boosts device performance. This research shows that high-performance OSCs could be fabricated by large-scale, R2R micro-gravure printing with solvent engineering, which would accelerate the development of fully R2R micro-gravure printed flexible OSCs.

Original languageEnglish
Article number044007
JournalFlexible and Printed Electronics
Issue number4
Publication statusPublished - 17 Dec 2019

Scopus Subject Areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

User-Defined Keywords

  • micro-gravure printing
  • organic solar cells
  • roll-to-roll (R2R)
  • solvent engineering


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