无需外部触发即可实现室温自愈的柔性过氧化物光电探测器

IF 22.7 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Infomat Pub Date : 2024-06-28 DOI:10.1002/inf2.12594
Guoyi Li, Shenghong Li, Jahangeer Ahmed, Wei Tian, Liang Li
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引用次数: 0

摘要

柔性过氧化物光电探测器(FPD)在仿生学、机器人学和医疗保健领域的新型可穿戴设备中大有可为。然而,它们在运行过程中的性能退化和不稳定性仍然是一个巨大的挑战。无需任何外部驱动或干预即可实现设备的卓越灵活性和自发功能修复是 FPD 的理想目标。在这里,通过使用苯基二硫化物而不是烷基二硫化物作为交联剂,引入了键能较低的二硫键,从而使聚氨酯网络(SCPU)在室温下具有自修复能力。将 SCPU 填充到过氧化物薄膜的晶界,不仅能提高过氧化物的晶体质量和 FPD 的机械稳定性,还能使 FPD 在室温下自愈合。因此,制备的 FPD 在自供电模式下具有 0.4 A W-1 的超高响应度、2.5 × 1011 Jones 的高比检测度和 2 μs 的快速响应时间。更重要的是,FPD 在经过 9000 次弯曲循环愈合后,仍保留了 91% 的初始光响应率。这种聚合物掺杂策略为 FPD 的稳定运行和室温自愈提供了有效的解决方案。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Flexible perovskite photodetector with room-temperature self-healing capability without external trigger

Flexible perovskite photodetector with room-temperature self-healing capability without external trigger
Flexible perovskite photodetectors (FPDs) are promising for novel wearable devices in bionics, robotics and health care. However, their performance degradation and instability during operations remain a grand challenge. Superior flexibility and spontaneous functional repair of devices without the need for any external drive or intervention are ideal goals for FPDs. Herein, by using phenyl disulfide instead of alkyl disulfide as a crosslinking agent, disulfide bonds with lower bond energy are introduced, thus endowing the polyurethane network (SCPU) with the ability of self-healing at room temperature. SCPU is filled to the grain boundary of perovskite film, which not only improves the crystal quality of perovskite and mechanical stability of FPD but also enables FPD to self-heal at room temperature. As a result, the as-prepared FPD exhibits a superior responsivity of 0.4 A W−1, a high specific detectivity of 2.5 × 1011 Jones and 2 μs fast response time in a self-powered mode. More importantly, the FPD still retained 91% of the initial photo responsivity after 9000 times of bending upon cyclic healing. This polymer doping strategy provides an effective solution for stable operation and room-temperature self-healing for FPDs.
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来源期刊
Infomat
Infomat MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
37.70
自引率
3.10%
发文量
111
审稿时长
8 weeks
期刊介绍: InfoMat, an interdisciplinary and open-access journal, caters to the growing scientific interest in novel materials with unique electrical, optical, and magnetic properties, focusing on their applications in the rapid advancement of information technology. The journal serves as a high-quality platform for researchers across diverse scientific areas to share their findings, critical opinions, and foster collaboration between the materials science and information technology communities.
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