Solution-processed NiOx nanoparticles with a wide pH window as an efficient hole transport material for high performance tin-based perovskite solar cells

Xiaolan Tong, Fangjie Li, Junjun Jin, Xunyun Guo, Jinhua Li, Feng Yan, Xing Zhong Zhao, Qidong Tai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)


The development of tin-based perovskite solar cells (PSCs) is a promising approach to meet the demand of eco-friendly, lead-free perovskite photovoltaics. Limited to the poor chemical stability of tin perovskites, tin-based PSCs usually have to be fabricated with an inverted device structure and both the device efficiency and stability are highly dependent on the selection of hole transport materials (HTMs). Here, we report the synthesis of inorganic nickel oxide (NiOx) nanoparticles (NPs) via a soft base precipitation method, which enables us to obtain highly dispersed NiOx NPs over a wide pH window. The as-prepared NiOx NPs are employed as the HTM for formamidinium tin iodide (FASnI3) PSCs, resulting in excellent device efficiency (∼8%) and stability (1200 h). Our study offers a facile strategy for mass production of NiOx NPs and easy access to efficient and robust inorganic HTMs that could further boost the development of high performance tin-based PSCs.

Original languageEnglish
Article number144002
JournalJournal of Physics D: Applied Physics
Issue number14
Publication statusPublished - 8 Apr 2021


  • High performance
  • Lead-free
  • NiO nanoparticles
  • Perovskite solar cell
  • Solution-processed

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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