Abstract

Eco-friendly Sn-based perovskites show significant potential for high-performance second near-infrared window light-emitting diodes (900 nm – 1700 nm). Nevertheless, achieving efficient and stable Sn-based perovskite second near-infrared window light-emitting diodes remains challenging due to the propensity of Sn2+ to oxidize, resulting in detrimental Sn4+-induced defects and compromised device performance. Here, we present a targeted strategy to eliminate Sn4+-induced defects through moisture-triggered hydrolysis of tin tetrahalide, without degrading Sn2+ in the CsSnI3 film. During the moisture treatment, tin tetrahalide is selectively hydrolyzed to Sn(OH)4, which provides sustained protection. As a result, we successfully fabricate second near-infrared window light-emitting diodes emitting at 945 nm, achieving a performance breakthrough with an external quantum efficiency of 7.6% and an operational lifetime reaching 82.6 h.

Guan et al. report a strategy of moisture-triggered selective hydrolysis of Sn4+ into Sn(OH)4, eliminating Sn4 + -induced defects in tin-based perovskites and enhancing the electron injection in NIR-II LED devices with peak emission of 945 nm and external quantum efficiency of 7.6%.

Details

Title
Targeted elimination of tetravalent-Sn-induced defects for enhanced efficiency and stability in lead-free NIR-II perovskite LEDs
Author
Guan, Xiang 1 ; Li, Yuqing 2 ; Meng, Yuanyuan 2 ; Wang, Kongxiang 3 ; Lin, Kebin 2 ; Luo, Yujie 3 ; Wang, Jing 3 ; Duan, Zhongtao 3 ; Liu, Hong 3 ; Yang, Liu 2 ; Zheng, Lingfang 2 ; Lin, Junpeng 2 ; Weng, Yalian 2 ; Xie, Fengxian 3   VIAFID ORCID Logo  ; Lu, Jianxun 4   VIAFID ORCID Logo  ; Wei, Zhanhua 2   VIAFID ORCID Logo 

1  Fudan University, Institute for Electric Light Sources, Shanghai Engineering Research Center for Artificial Intelligence and Integrated Energy System, School of Information Science and Technology, Shanghai, China (GRID:grid.8547.e) (ISNI:0000 0001 0125 2443); Huaqiao University, Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Xiamen, China (GRID:grid.411404.4) (ISNI:0000 0000 8895 903X) 
2  Huaqiao University, Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Xiamen, China (GRID:grid.411404.4) (ISNI:0000 0000 8895 903X) 
3  Fudan University, Institute for Electric Light Sources, Shanghai Engineering Research Center for Artificial Intelligence and Integrated Energy System, School of Information Science and Technology, Shanghai, China (GRID:grid.8547.e) (ISNI:0000 0001 0125 2443) 
4  Huaqiao University, Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing, Institute of Luminescent Materials and Information Displays, College of Materials Science and Engineering, Xiamen, China (GRID:grid.411404.4) (ISNI:0000 0000 8895 903X); Division of Physical Science and Engineering, KAUST Catalysis Center (KCC), King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (GRID:grid.45672.32) (ISNI:0000 0001 1926 5090) 
Pages
9913
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
20411723
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41467-024-54160-x
ProQuest document ID
3128898360
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.