Synergistic Effects of Eu-MOF on Perovskite Solar Cells with Improved Stability

Jie Dou, Cheng Zhu, Hao Wang, Ying Han, Sai Ma, Xiuxiu Niu, Nengxu Li, Congbo Shi, Zhiwen Qiu, Huanping Zhou, Yang Bai, Qi Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

140 Citations (Scopus)

Abstract

Enhancing device lifetime is one of the essential challenges in perovskite solar cells. The ultrathin Eu-MOF layer is introduced at the interface between the electron-transport layer and the perovskite absorber to improve the device stability. Both Eu ions and organic ligands in the MOF can reduce the defect concentration and improve carrier transport. Moreover, due to the Förster resonance energy transfer effect, Eu-MOF in perovskite films can improve light utilization and reduce the decomposition under ultraviolet light. Meanwhile, Eu-MOF also turns tensile strain to compressive strain in the perovskite films. As a result, the corresponding devices achieve a champion power conversion efficiency (PCE) of 22.16%. In addition, the devices retain 96% of their original PCE after 2000 h under the relative humidity of 30% and 91% of their original PCE after 1200 h after continuous 85 °C aging condition in N2.

Original languageEnglish
Article number2102947
JournalAdvanced Materials
Volume33
Issue number39
DOIs
Publication statusPublished - 1 Oct 2021

Keywords

  • Eu-MOF
  • perovskite solar cells
  • stability
  • synergistic effects

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