Small-molecule organic photovoltaic modules fabricated via halogen-free solvent system with roll-to-roll compatible scalable printing method

Youn Jung Heo, Yen Sook Jung, Kyeongil Hwang, Jueng Eun Kim, Jun Seok Yeo, Sehyun Lee, Ye Jin Jeon, Donmin Lee, Dong Yu Kim

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)


For the first time, the photovoltaic modules composed of small molecule were successfully fabricated by using roll-to-roll compatible printing techniques. In this study, blend films of small molecules, BTR and PC71BM were slot-die coated using a halogen-free solvent system. As a result, high efficiencies of 7.46% and 6.56% were achieved from time-consuming solvent vapor annealing (SVA) treatment and roll-to-roll compatible solvent additive approaches, respectively. After successful verification of our roll-to-roll compatible method on small-area devices, we further fabricated large-area photovoltaic modules with a total active area of 10 cm2, achieving a power conversion efficiency (PCE) of 4.83%. This demonstration of large-area photovoltaic modules through roll-to-roll compatible printing methods, even based on a halogen-free solvent, suggests the great potential for the industrial-scale production of organic solar cells (OSCs).

Original languageEnglish
Pages (from-to)39519-39525
Number of pages7
JournalACS Applied Materials & Interfaces
Issue number45
Publication statusPublished - 15 Nov 2017
Externally publishedYes


  • halogen-free additives
  • halogen-free solvent
  • organic photovoltaic modules
  • slot-die printing method
  • small molecule solar cell

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