Fluorinated Interlayer Modulation of NiOx-Based Inverted Perovskite Solar Cells

Hui Li, Abdulaziz S. R. Bati, Ronan Chu, Guanran Zhang, Yanyan Li, Qianqian Lin, Paul L. Burn, Paul E. Shaw, Ian R. Gentle

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


p-Type inorganic nickel oxide (NiOx) exhibits high transparency, tunable-optoelectronic properties, and a work function (WF) that is potentially suitable for hole extraction in inverted perovskite solar cells (PSCs). However, NiOx films possess surface defects that lead to high interfacial recombination and an energy offset with the ionization potential of the perovskite. Herein, we show that fluorinated 3-(2,3,4,5,6-pentafluorophenyl)propan-1-aminium iodide (FPAI) can be used to modify the electronic properties of the NiOx anode interlayer. The FPAI modification led to good perovskite crystal growth and films with reduced surface defects. The FPAI modification also increased the WF of NiOx and improved charge extraction. These improvements led to an increased Voc value compared with control devices without FPAI modification, 1.05 V versus 1.00 V, and a higher short-circuit current and larger fill factor. As a result, the best PSCs with FPAI-modified NiOx had a power conversion efficiency of 19.3%. Finally, the PSCs with the FPAI-modified NiOx layer were found to have improved stability.
Original languageEnglish (US)
JournalACS Applied Materials & Interfaces
StatePublished - Sep 9 2022
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science


Dive into the research topics of 'Fluorinated Interlayer Modulation of NiOx-Based Inverted Perovskite Solar Cells'. Together they form a unique fingerprint.

Cite this