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Main Authors:	Xiuling Li, Yuechuan Bi, Xiang Guan, Jiaqi Wang, Jinli Liu, Yingjie Zhao, Chunli Zhao, Zhuojian Li, Shurui Chi, Junnan Wang, Renjing Chen, Zixun Zhao, Zemin Wang, Xin Tong, Ninggui Ma, Han Liu, Zhiming Wang, Zongwen Liu, Yang Ren, Zhanhua Wei, Kebin Lin
Format:	Artículo Open Access
Published:	Wiley 2025
Subjects:	Advanced Materials
Online Access:	https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202516632
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author	Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin
author_facet	Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin
collection	Wiley Open Access
contents	High‐Performance NIR‐II Sn‐Based Perovskite LEDs Enabled by the Functionalization of Sulfaguanidine Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin Advanced Materials ABSTRACT Eco‐friendly CsSnI 3 ‐based perovskite light‐emitting diodes (PeLEDs) with the emission peak extending to the near‐infrared‐II (NIR‐II) region hold tremendous potential for applications in biological monitoring, night vision, and optical communications. However, the various defects caused by the instability of Sn 2+ within the CsSnI 3 film, and the non‐equilibrium carrier injection rate in the devices are the two major factors that limit the device performance. Here, we report high‐performance NIR‐II CsSnI 3 ‐based PeLEDs achieved by employing functional sulfaguanidine (SG) molecules. Due to the strong S═O─Sn coordination bonds, NH 2 ···I − hydrogen bonds could be formed between CsSnI 3 and SG, which effectively eliminated various Sn(II)‐related defects in the CsSnI 3 film. Moreover, the SG molecules significantly improved the morphological uniformity and regulated the carrier injection balance, resulting in more balanced carrier injection that enhanced the effective radiation recombination rate. Consequently, the optimized CsSnI 3 ‐SG PeLEDs achieved a breakthrough external quantum efficiency (EQE) of 8.1%, which is the highest efficiency reported for CsSnI 3 ‐based PeLEDs to date. 10.1002/adma.202516632 http://onlinelibrary.wiley.com/termsAndConditions#vor
doi_str_mv	10.1002/adma.202516632
format	Artículo Open Access
id	wiley_oa_10_1002_adma_202516632
institution	Wiley Open Access
license_str_mv	http://onlinelibrary.wiley.com/termsAndConditions#vor
publishDate	2025
publisher	Wiley
record_format	wiley_oa
spellingShingle	High‐Performance NIR‐II Sn‐Based Perovskite LEDs Enabled by the Functionalization of Sulfaguanidine Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin Advanced Materials High‐Performance NIR‐II Sn‐Based Perovskite LEDs Enabled by the Functionalization of Sulfaguanidine Xiuling Li Yuechuan Bi Xiang Guan Jiaqi Wang Jinli Liu Yingjie Zhao Chunli Zhao Zhuojian Li Shurui Chi Junnan Wang Renjing Chen Zixun Zhao Zemin Wang Xin Tong Ninggui Ma Han Liu Zhiming Wang Zongwen Liu Yang Ren Zhanhua Wei Kebin Lin Advanced Materials ABSTRACT Eco‐friendly CsSnI 3 ‐based perovskite light‐emitting diodes (PeLEDs) with the emission peak extending to the near‐infrared‐II (NIR‐II) region hold tremendous potential for applications in biological monitoring, night vision, and optical communications. However, the various defects caused by the instability of Sn 2+ within the CsSnI 3 film, and the non‐equilibrium carrier injection rate in the devices are the two major factors that limit the device performance. Here, we report high‐performance NIR‐II CsSnI 3 ‐based PeLEDs achieved by employing functional sulfaguanidine (SG) molecules. Due to the strong S═O─Sn coordination bonds, NH 2 ···I − hydrogen bonds could be formed between CsSnI 3 and SG, which effectively eliminated various Sn(II)‐related defects in the CsSnI 3 film. Moreover, the SG molecules significantly improved the morphological uniformity and regulated the carrier injection balance, resulting in more balanced carrier injection that enhanced the effective radiation recombination rate. Consequently, the optimized CsSnI 3 ‐SG PeLEDs achieved a breakthrough external quantum efficiency (EQE) of 8.1%, which is the highest efficiency reported for CsSnI 3 ‐based PeLEDs to date. 10.1002/adma.202516632 http://onlinelibrary.wiley.com/termsAndConditions#vor
title	High‐Performance NIR‐II Sn‐Based Perovskite LEDs Enabled by the Functionalization of Sulfaguanidine
topic	Advanced Materials
url	https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202516632

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