Self-Organized Carbazole Phosphonic Acid Additives at Buried Interface Enhance Efficiency of Blue Perovskite LEDs

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2024-09-03 DOI:10.1021/acsenergylett.4c01674

Guangruixing Zou, Zhaohua Zhu, Zixin Zeng, Zhiqiang Guan, Nan Zhang, Wenlin Jiang, Ziming Chen, Ye Wu, Desui Chen, Francis R. Lin, Sai-Wing Tsang, Chun-Sing Lee, Andrey L. Rogach, Alex K.-Y. Jen, Hin-Lap Yip

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Abstract

Carbazole phosphonic acids (CPAs) that are used in self-assembled monolayers (SAMs) are well-reported. Yet, an understanding of their broader application still needs to be fully established. In this work, we demonstrate that incorporating CPAs into blue quasi-2D perovskite precursors as additives is an effective strategy for fine-tuning phase distribution and enhancing the radiative characteristics of the resultant films. [2-(9H-Carbazol-9-yl)ethyl]phosphonic acid (2PACz) emerges as the most effective molecule for improving device performance. Significantly, when the perovskite film is deposited onto a hole injection structure of ITO/Mg_0.1Ni_0.9O_x/SAM/poly(9-vinylcarbazole) (PVK), 2PACz preferentially migrates to the PVK/perovskite interface. This phenomenon is driven by the strong interaction between the carbazole components of both PVK and 2PACz, leading to a stabilized interface. Coupled with the controlled phase distribution of the perovskite, this approach results in a marked increase in external quantum efficiency for blue perovskite LEDs, advancing from 11% to beyond 15%. These insights underscore the versatility of CPAs in the development of high-efficiency optoelectronic devices.

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埋入式界面上的自组织咔唑膦酸添加剂可提高蓝色包晶发光二极管的效率

用于自组装单层膜（SAMs）的咔唑膦酸（CPAs）已被广泛报道。然而，对其更广泛应用的理解仍有待全面确立。在这项研究中，我们证明了在蓝色准二维包晶前驱体中加入 CPAs 作为添加剂是微调相分布和增强所得薄膜辐射特性的有效策略。[2-(9H-咔唑-9-基)乙基]膦酸（2PACz）是提高设备性能最有效的分子。值得注意的是，当将过氧化物薄膜沉积到 ITO/Mg0.1Ni0.9Ox/SAM/poly(9-vinylcarbazole) (PVK) 的空穴注入结构上时，2PACz 会优先迁移到 PVK/ 过氧化物界面。这一现象是由于 PVK 和 2PACz 的咔唑成分之间的强烈相互作用导致了界面的稳定。这种方法与可控的过氧化物相分布相结合，显著提高了蓝色过氧化物 LED 的外部量子效率，从 11% 提高到 15% 以上。这些见解强调了 CPA 在开发高效光电设备方面的多功能性。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.