发表刊物：Nature Communctions
摘要：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 Sn(2+) to oxidize, resulting in detrimental Sn(4+)-induced defects and compromised device performance. Here, we present a targeted strategy to eliminate Sn(4+)-induced defects through moisture-triggered hydrolysis of tin tetrahalide, without degrading Sn(2+) in the CsSnI(3) 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.
论文类型：期刊论文
学科门类：工学
一级学科：材料科学与工程
卷号：15
期号：1
页面范围：9913
ISSN号：2041-1723
是否译文：否
发表时间：2024-11-25
收录刊物：SCI
DOI码：10.1038/s41467-024-54160-x
影响因子：16.6