Halide perovskite based on hydrophobic ionic liquid for stability improving and its application in high-efficient photovoltaic cell

Jue Wang, Xiaoxue Ye, Yanying Wang, Zhengguo Wang, Wingleung Wong, Chunya Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

13 Citations (Scopus)


A novel ionic liquid, 3-(3-aminopropyl)-1-methylimidazolium hexafluorophosphate (APMimPF 6 ), with high hydrophobic property was successfully applied as the functional monomer for the halide perovskite preparation. The new hydrophobic ionic liquid significantly facilitates the perovskite forming a 2-dimensional structure with good passivation, particularly at the grain boundaries because of the high hydrophobic character and large size of ionic liquid molecule. The perovskite solar cell fabricated with this new perovskite based on the hydrophobic ionic liquid was found possessing excellent properties: the maximum value of J sc = 22.9 mA cm −2 , V oc = 1.05 V, and PCE = 17.3%. In addition, the perovskite solar cell also shows good long-term stability, which benefited from the protecting effect of the high hydrophobic ionic liquid. In a typical stability test, the cells stored under the conditions with a relative humidity of 57% for 40 days, the PCE was able to retain 98% of its initial value. Therefore, the present study demonstrated a significant protocol for the development of highly stable perovskite solar cells.

Original languageEnglish
Pages (from-to)133-139
Number of pages7
JournalElectrochimica Acta
Publication statusPublished - 20 Apr 2019
Externally publishedYes


  • High stability
  • Hydrophobic property
  • Ionic liquid
  • Perovskite
  • Solar cells

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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