通过引入liff修饰层实现高效钙钛矿发光二极管

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-02 DOI:10.1063/5.0239423

Xulan Xue, Zhibo Zhao, Huidan Zhang, Xingchen Lin, Yongqiang Ning, Lijun Wang, Wenyu Ji, Hongbo Zhu

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引用次数: 0

摘要

表面缺陷钝化和激子调控仍然是钙钛矿发光二极管（PeLEDs）的关键挑战。有机分子被广泛用于解决这些问题。然而，钙钛矿薄膜对分子基团和浓度的高灵敏度限制了其商业化应用。在这里，我们开发了一种简单和低成本的钝化策略，与传统的pled制造工艺兼容。通过真空热蒸发法制备一层LiF薄膜，有效地钝化了钙钛矿薄膜的缺陷。同时，薄的LiF层保护钙钛矿中形成的激子不被电子传输层淬灭。由于LiF的协同作用，实现了高效的绿色PeLED，最大电流效率为47.0 cd/ a，亮度为30 280 cd/m2，比没有LiF修饰层的控制装置（28.5 cd/ a, 11 380 cd/m2）分别提高了65%和166%。我们的工作为实现高性能ped提供了有效的策略和对接口调节的深刻理解。

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High-efficiency perovskite light-emitting diodes enabled by introducing a LiF modification layer

Surface defect passivation and exciton regulation remain a critical challenge in perovskite light-emitting diodes (PeLEDs). Organic molecules are widely used to solve these issues. However, the high sensitivity of perovskite films to the molecular groups and concentration limited their commercialization applications. Here, we develop a facile and low-cost passivation strategy that is compatible with traditional fabrication processes of PeLEDs. By depositing a thin LiF layer using vacuum thermal evaporation technique, the defects of perovskite film are effectively passivated. Simultaneously, the thin LiF layer protects the excitons formed in perovskite from quenching by the electron-transport layer. Due to the synergistic effect of LiF, an efficient green PeLED is achieved with a maximum current efficiency of 47.0 cd/A and luminance of 30 280 cd/m2, representing respective 65% and 166% increase than that of the control device without LiF modification layer (28.5 cd/A and 11 380 cd/m2). Our work provides an effective strategy and deep understanding of the interface regulation for achieving high-performance PeLEDs.

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来源期刊

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.