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

Ligang Wang; Huanping Zhou; Junnan Hu; Bolong Huang; Mingzi Sun; Bowei Dong; Guanghaojie Zheng; Yuan Huang; Yihua Chen; Liang Li; Ziqi Xu; Nengxu Li; Zheng Liu; Qi Chen; Ling-Dong Sun; Chun-Hua Yan

doi:10.1126/science.aau5701

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

Ligang Wang, Huanping Zhou^*, Junnan Hu, Bolong Huang, Mingzi Sun, Bowei Dong, Guanghaojie Zheng, Yuan Huang, Yihua Chen, Liang Li, Ziqi Xu, Nengxu Li, Zheng Liu, Qi Chen, Ling-Dong Sun, Chun-Hua Yan

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

965 Citations (Scopus)

Abstract

The components with soft nature in the metal halide perovskite absorber usually generate lead (Pb) ⁰ and iodine (I) ⁰ defects during device fabrication and operation. These defects serve as not only recombination centers to deteriorate device efficiency but also degradation initiators to hamper device lifetimes. We show that the europium ion pair Eu ³⁺ -Eu ²⁺ acts as the “redox shuttle” that selectively oxidized Pb ⁰ and reduced I ⁰ defects simultaneously in a cyclical transition. The resultant device achieves a power conversion efficiency (PCE) of 21.52% (certified 20.52%) with substantially improved long-term durability. The devices retained 92% and 89% of the peak PCE under 1-sun continuous illumination or heating at 85°C for 1500 hours and 91% of the original stable PCE after maximum power point tracking for 500 hours, respectively. © 2019 American Association for the Advancement of Science. All Rights Reserved.

Original language	English
Pages (from-to)	265-270
Journal	Science
Volume	363
Issue number	6424
DOIs	https://doi.org/10.1126/science.aau5701
Publication status	Published - 18 Jan 2019
Externally published	Yes

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Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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

abstract = "The components with soft nature in the metal halide perovskite absorber usually generate lead (Pb) 0 and iodine (I) 0 defects during device fabrication and operation. These defects serve as not only recombination centers to deteriorate device efficiency but also degradation initiators to hamper device lifetimes. We show that the europium ion pair Eu 3+ -Eu 2+ acts as the “redox shuttle” that selectively oxidized Pb 0 and reduced I 0 defects simultaneously in a cyclical transition. The resultant device achieves a power conversion efficiency (PCE) of 21.52% (certified 20.52%) with substantially improved long-term durability. The devices retained 92% and 89% of the peak PCE under 1-sun continuous illumination or heating at 85°C for 1500 hours and 91% of the original stable PCE after maximum power point tracking for 500 hours, respectively. {\textcopyright} 2019 American Association for the Advancement of Science. All Rights Reserved.",

author = "Ligang Wang and Huanping Zhou and Junnan Hu and Bolong Huang and Mingzi Sun and Bowei Dong and Guanghaojie Zheng and Yuan Huang and Yihua Chen and Liang Li and Ziqi Xu and Nengxu Li and Zheng Liu and Qi Chen and Ling-Dong Sun and Chun-Hua Yan",

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T1 - A Eu 3+ -Eu 2+ ion redox shuttle imparts operational durability to Pb-I perovskite solar cells

AU - Wang, Ligang

AU - Zhou, Huanping

AU - Hu, Junnan

AU - Huang, Bolong

AU - Sun, Mingzi

AU - Dong, Bowei

AU - Zheng, Guanghaojie

AU - Huang, Yuan

AU - Chen, Yihua

AU - Li, Liang

AU - Xu, Ziqi

AU - Li, Nengxu

AU - Liu, Zheng

AU - Chen, Qi

AU - Sun, Ling-Dong

AU - Yan, Chun-Hua

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2019/1/18

Y1 - 2019/1/18

N2 - The components with soft nature in the metal halide perovskite absorber usually generate lead (Pb) 0 and iodine (I) 0 defects during device fabrication and operation. These defects serve as not only recombination centers to deteriorate device efficiency but also degradation initiators to hamper device lifetimes. We show that the europium ion pair Eu 3+ -Eu 2+ acts as the “redox shuttle” that selectively oxidized Pb 0 and reduced I 0 defects simultaneously in a cyclical transition. The resultant device achieves a power conversion efficiency (PCE) of 21.52% (certified 20.52%) with substantially improved long-term durability. The devices retained 92% and 89% of the peak PCE under 1-sun continuous illumination or heating at 85°C for 1500 hours and 91% of the original stable PCE after maximum power point tracking for 500 hours, respectively. © 2019 American Association for the Advancement of Science. All Rights Reserved.

AB - The components with soft nature in the metal halide perovskite absorber usually generate lead (Pb) 0 and iodine (I) 0 defects during device fabrication and operation. These defects serve as not only recombination centers to deteriorate device efficiency but also degradation initiators to hamper device lifetimes. We show that the europium ion pair Eu 3+ -Eu 2+ acts as the “redox shuttle” that selectively oxidized Pb 0 and reduced I 0 defects simultaneously in a cyclical transition. The resultant device achieves a power conversion efficiency (PCE) of 21.52% (certified 20.52%) with substantially improved long-term durability. The devices retained 92% and 89% of the peak PCE under 1-sun continuous illumination or heating at 85°C for 1500 hours and 91% of the original stable PCE after maximum power point tracking for 500 hours, respectively. © 2019 American Association for the Advancement of Science. All Rights Reserved.

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M3 - RGC 21 - Publication in refereed journal

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