Ligang Wang1, Huanping Zhou1, Junnan Hu1, Bolong Huang2, Mingzi Sun2, Bo‐Wei Dong1, Guanghaojie Zheng1, Yuan Huang1, Yihua Chen1, Liang Li1, Ziqi Xu1, Nengxu Li1, Zheng Liu1, Qi Chen3, Ling‐Dong Sun1, Chun‐Hua Yan1
1Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, Key Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China.
2Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR
3Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China.
Tóm tắt
A redox road to recovery
Device longevity is a key issue for organic-inorganic perovskite solar cells. Encapsulation can limit degradation arising from reactions with oxygen and water, but light, electric-field, and thermal stresses can lead to metastable elemental lead and halide atom defects. Wang
et al.
show that for the lead-iodine system, the introduction of the rare earth europium ion pair Eu
3+
-Eu
2+
can shuttle electrons and recover lead and iodine ions (Pb
2+
and I
−
). Devices incorporating this redox shuttle maintained more than 90% of their initial power conversion efficiencies under various aging conditions.
Science
, this issue p.
265
