Highly Efficient and Air Stable Inverted Polymer Solar Cells Using LiF-Modified ITO Cathode and MoO3/AgAl Alloy Anode

Xiangkun Jia, Ziyao Jiang, Xiaohong Chen*, Jianping Zhou, Likun Pan, Fu Rong ZHU, Zhuo Sun, Sumei Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The performance and air stability of inverted polymer solar cells (PSCs) were greatly improved using a combination of LiF-modified ITO cathode and a MoO3/AgAl alloy anode. The power conversion efficiency (PCE) of PSCs with AgAl contact reached 9.4%, which is higher than that of the cells with Ag (8.8%) and Al electrode (7.6%). The PCE of AgAl-based PSCs can further increase up to 10.3% through incorporating an ultrathin LiF-modified ITO. AgAl-based cells also exhibit a superior stability compared to the cells with Ag and Al contacts. PCE of the AgAl-based cells without encapsulation remains 78% of its original value after the cells were aged for 380 days in air. The presence of a LiF-modified ZnO interlayer between ITO and the organic active layer improves the charge collection. The improvement in PCE and stability of the AgAl-based cells is primarily attributed to the formation of AlOx at the MoO3/AgAl interface, preventing Ag diffusion and improving the built-in potential across the active layer in the cells.

Original languageEnglish
Pages (from-to)3792-3799
Number of pages8
JournalACS applied materials & interfaces
Volume8
Issue number6
DOIs
Publication statusPublished - 24 Feb 2016

Scopus Subject Areas

  • Materials Science(all)

User-Defined Keywords

  • AgAl alloy
  • electrodes
  • high efficiency
  • LiF interlayer
  • MoO
  • polymer solar cells
  • stability
  • ZnO

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