Slot die coated planar perovskite solar cells via blowing and heating assisted one step deposition

Jueng Eun Kim, Yen Sook Jung, Youn Jung Heo, Kyeongil Hwang, Tianshi Qin, Dong Yu Kim, Doojin Vak

Research output: Contribution to journalArticleResearchpeer-review

83 Citations (Scopus)


CH3NH3PbI3-based planar perovskite solar cells were fabricated by slot-die coating, a scalable method. Slot-die coating tends to produce perovskite layers with much lower coverage with overgrown crystals than spin coating, which does not include a self-drying mechanism in the process. To mimic the self-drying behavior inherent in spin coating, the present study introduces a blowing step in the slot-die coating method, which significantly improved coverage of the prepared slot-die coated perovskite films. The slot-die-coated device with blowing showed a moderate power conversion efficiency (PCE) of 8.8%. The morphology of the slot-die-coated perovskite film is further improved by optimizing the deposition temperature. The combination of blowing and heating during the slot-die-coating step and the introduction of a printing-friendly hole transport layer resulted in a PCE of 12.7% for the devices fabricated in air.

Original languageEnglish
Pages (from-to)80-86
Number of pages7
JournalSolar Energy Materials and Solar Cells
Publication statusPublished - 1 Jun 2018
Externally publishedYes


  • Hot deposition
  • Perovskite PV
  • Printed solar cells
  • Roll-to-roll printing
  • Scalable process
  • Slot die coating

Cite this