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Critical role of additive-induced molecular interaction on the operational stability of perovskite light-emitting diodes
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SYSNO ASEP 0541446 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Critical role of additive-induced molecular interaction on the operational stability of perovskite light-emitting diodes Author(s) Kuang, C. (SE)
Hu, Z. (SE)
Yuan, Z. (SE)
Wen, K. (CN)
Qing, J. (SE)
Kobera, Libor (UMCH-V) RID, ORCID
Abbrent, Sabina (UMCH-V) RID, ORCID
Brus, Jiří (UMCH-V) RID, ORCID
Yin, C. (SE)
Wang, H. (SE)
Xu, W. (SE)
Wang, J. (CN)
Bai, S. (SE)
Gao, F. (SE)Source Title Joule. - : Cell Press - ISSN 2542-4351
Roč. 5, č. 3 (2021), s. 618-630Number of pages 13 s. Language eng - English Country US - United States Keywords metal halide perovskite ; light-emitting diode ; operational stability Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Method of publishing Open access Institutional support UMCH-V - RVO:61389013 UT WOS 000630098300012 EID SCOPUS 85102345653 DOI 10.1016/j.joule.2021.01.003 Annotation Despite rapid improvements in efficiency and brightness of perovskite light-emitting diodes (PeLEDs), the poor operational stability remains a critical challenge hindering their practical applications. Here, we demonstrate greatly improved operational stability of high-efficiency PeLEDs, enabled by incorporating dicarboxylic acids into the precursor for perovskite depositions. We reveal that the dicarboxylic acids efficiently eliminate reactive organic ingredients in perovskite emissive layers through an in situ amidation process, which is catalyzed by the alkaline zinc oxide substrate. The formed stable amides prohibit detrimental reactions between the perovskites and the charge injection layer underneath, stabilizing the perovskites and the interfacial contacts and ensuring the excellent operational stability of the resulting PeLEDs. Through rationally optimizing the amidation reaction in the perovskite emissive layers, we achieve efficient PeLEDs with a peak external quantum efficiency of 18.6% and a long half-life time of 682 h at 20 mA cm−2, presenting an important breakthrough in PeLEDs. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S2542435121000039?via%3Dihub
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