New Hybrid Hole Extraction Layer of Perovskite Solar Cells with a Planar p-i-n Geometry

Ik Jae Park, Min Ah Park, Dong Hoe Kim, Gyeong Do Park, Byeong Jo Kim, Hae Jung Son, Min Jae Ko, Doh Kwon Lee, Taiho Park, Hyunjung Shin, Nam Gyu Park, Hyun Suk Jung, Jin Young Kim

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)


We report a highly efficient p-i-n type planar perovskite solar cell with a hybrid PEDOT/NiOx hole-extraction layer. It has been found that the perovskite solar cell with a NiOx thin film as a hole-extraction layer generally exhibits lower fill factor compared to the conventionally used PEDOT:PSS thin film, whereas it shows higher photocurrent and photovoltage. The fill factor of the NiOx-based perovskite solar cell can be significantly improved by treating the NiOx surface with a dilute PEDOT solution. The photoluminescence quenching study and impedance spectroscopic (IS) analysis have revealed that the hole injection at the perovskite/NiOx interface is significantly facilitated with the PEDOT treatment, which should lead to the increased fill factor. As a result, the p-i-n type planar perovskite solar cell with the new hybrid hole-extraction layer exhibits a high conversion efficiency of 15.1% without the hysteresis effect.

Original languageEnglish
Pages (from-to)27285-27290
Number of pages6
JournalJournal of Physical Chemistry C
Issue number49
Publication statusPublished - 2015 Dec 10
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 American Chemical Society.

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films


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