Optimal Solvents for Interfacial Solution Engineering of Perovskite Solar Cells

Do Yeon Heo, Won Jin Jang, Min Ju Jeong, Jun Hong Noh, Soo Young Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Interfacial engineering is extensively used to reduce the interfacial loss caused by surface recombination, improve the crystallinity of the active absorption layer, and enhance the long-term stability of perovskite solar cells (PSCs). Solution processing techniques, such as spin coating and dip coating, are commonly used to deposit the interfacial layer because of their cost-effectiveness and simplicity. Although determining suitable solutes for use in these processes is important, selecting appropriate solvents is also crucial. Herein, commonly used solvents are investigated to determine optimal solvents for solution processing by categorizing them into nonpolar and polar groups. The results suggest that the efficiency of the PSCs can be increased by simple solvent treatment. In particular, the efficiencies of systems subjected to hexane (nonpolar) and ethanol (polar) treatment are significantly improved (17.31% and 17.44%, respectively) compared with that of a control device (16.24%). Herein, the effects of pure solvents on the SnO2–perovskite interface are confirmed and an important direction for investigations that adopt solution processing to improve the efficiency of PSCs, such as research on interlayers and self-assembled monolayers, is suggested.

Original languageEnglish
Article number2200485
JournalSolar RRL
Issue number9
Publication statusPublished - 2022 Sept

Bibliographical note

Funding Information:
This study was supported by the National Research Foundation of Korea (NRF) (2020R1A2C2100670 and 2021R1A4A3027878).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.


  • defect passivations
  • interfacial engineering
  • perovskite solar cells
  • solvent engineering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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