Acceleration of radiative recombination for efficient perovskite LEDs

Mengmeng Li, Yingguo Yang, Zhiyuan Kuang, Chenjie Hao, Saixue Wang, Feiyue Lu, Zhongran Liu, Jinglong Liu, Lingjiao Zeng, Yuxiao Cai, Yulin Mao, Jingshu Guo, He Tian, Guichuan Xing, Yu Cao, Chao Ma, Nana Wang, Qiming Peng, Lin Zhu (), Wei Huang () and Jianpu Wang ()
Additional contact information
Mengmeng Li: Nanjing Tech University
Yingguo Yang: Fudan University
Zhiyuan Kuang: Nanjing Tech University
Chenjie Hao: Nanjing Tech University
Saixue Wang: Nanjing Tech University
Feiyue Lu: Nanjing Tech University
Zhongran Liu: Zhejiang University
Jinglong Liu: Nanjing Tech University
Lingjiao Zeng: Nanjing Tech University
Yuxiao Cai: Nanjing Tech University
Yulin Mao: University of Macau
Jingshu Guo: Zhejiang University
He Tian: Zhejiang University
Guichuan Xing: University of Macau
Yu Cao: Fujian Normal University
Chao Ma: Nanjing Tech University
Nana Wang: Nanjing Tech University
Qiming Peng: Nanjing Tech University
Lin Zhu: Nanjing Tech University
Wei Huang: Nanjing Tech University
Jianpu Wang: Nanjing Tech University

Nature, 2024, vol. 630, issue 8017, 631-635

Abstract: Abstract The increasing demands for more efficient and brighter thin-film light-emitting diodes (LEDs) in flat-panel display and solid-state lighting applications have promoted research into three-dimensional (3D) perovskites. These materials exhibit high charge mobilities and low quantum efficiency droop1–6, making them promising candidates for achieving efficient LEDs with enhanced brightness. To improve the efficiency of LEDs, it is crucial to minimize nonradiative recombination while promoting radiative recombination. Various passivation strategies have been used to reduce defect densities in 3D perovskite films, approaching levels close to those of single crystals3. However, the slow radiative (bimolecular) recombination has limited the photoluminescence quantum efficiencies (PLQEs) of 3D perovskites to less than 80% (refs. 1,3), resulting in external quantum efficiencies (EQEs) of LED devices of less than 25%. Here we present a dual-additive crystallization method that enables the formation of highly efficient 3D perovskites, achieving an exceptional PLQE of 96%. This approach promotes the formation of tetragonal FAPbI3 perovskite, known for its high exciton binding energy, which effectively accelerates the radiative recombination. As a result, we achieve perovskite LEDs with a record peak EQE of 32.0%, with the efficiency remaining greater than 30.0% even at a high current density of 100 mA cm−2. These findings provide valuable insights for advancing the development of high-efficiency and high-brightness perovskite LEDs.

Date: 2024
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41586-024-07460-7 Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:nature:v:630:y:2024:i:8017:d:10.1038_s41586-024-07460-7

Ordering information: This journal article can be ordered from
https://www.nature.com/

DOI: 10.1038/s41586-024-07460-7

Access Statistics for this article

Nature is currently edited by Magdalena Skipper

More articles in Nature from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().