Fabrication of Nickel Oxide Nanopillar Arrays on Flexible Electrodes for Highly Efficient Perovskite Solar Cells

Shan Cong, Guifu Zou*, Yanhui Lou, Hao Yang, Ying Su, Jie Zhao, Cheng Zhang, Peipei Ma, Zheng Lu, Hongyou Fan, Zhifeng Huang

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

41 Citations (Scopus)


Semiconductor nanomaterials with controlled morphologies and architectures are of critical importance for high-performance optoelectronic devices. However, the fabrication of such nanomaterials on polymer-based flexible electrodes is particularly challenging due to degradation of the flexible electrodes at a high temperature. Here we report the fabrication of nickel oxide nanopillar arrays (NiOx NaPAs) on a flexible electrode by vapor deposition, which enables highly efficient perovskite solar cells (PSCs). The NiOx NaPAs exhibit an enhanced light transmittance for light harvesting, prohibit exciton recombination, promote irradiation-generated hole transport and collection, and facilitate the formation of large perovskite grains. These advantageous features result in a high efficiency of 20% and 17% for the rigid and flexible PSCs, respectively. Additionally, the NaPAs show no cracking after 500 times of bending, consistent with the mechanic simulation results. This robust fabrication opens a new opportunity for the fabrication of a large area of high-performance flexible optoelectronic devices.

Original languageEnglish
Pages (from-to)3676-3683
Number of pages8
JournalNano Letters
Issue number6
Publication statusPublished - 12 Jun 2019

Scopus Subject Areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

User-Defined Keywords

  • nickel oxide
  • nanopillar arrays
  • hole transporting layer
  • flexible perovskite solar cells
  • glancing angle deposition


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