A Eu 3+ -Eu 2+ ion redox shuttle imparts operational durability to Pb-I perovskite solar cells

Author:

Wang Ligang1ORCID,Zhou Huanping1ORCID,Hu Junnan1ORCID,Huang Bolong2ORCID,Sun Mingzi2,Dong Bowei1,Zheng Guanghaojie1ORCID,Huang Yuan1,Chen Yihua1,Li Liang1,Xu Ziqi1ORCID,Li Nengxu1,Liu Zheng1,Chen Qi3ORCID,Sun Ling-Dong1ORCID,Yan Chun-Hua1ORCID

Affiliation:

1. Beijing 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....

2. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.

3. Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China.

Abstract

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

Funder

National Natural Science Foundation of China

MOST of China

National Key Research and Development Program of China

Beijing Natural Science Foundation

Young Talent Thousand Program

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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