For following the trend of miniaturization as per Moore’s law, increasing efforts have been made to develop single devices with versatile functionalities for Internet of Things (IoT). In this work, organic optical memory devices with excellent dual optoelectronic functionality including light sensing and data storage have been proposed. The Au@Ag core–shell nanorods (NRs)-based memory device exhibits large memory window up to 19.7 V due to the well-controlled morphology of Au@Ag NRs with optimum size and concentration. Furthermore, since the extinction intensity of Au@Ag NRs gradually enhance with the increase in Ag shell thickness, the phototunable behaviors of memory device were systematically studied by varying the thickness of Ag shell. Multilevel data storage can be achieved with the light assistant. Finally, the simulation results demonstrate that the phototunable memory property is originated from the multimode localized surface plasmon resonance (LSPR) of Au@Ag NRs, which is in consistent with the experimental results. The Au@Ag core–shell NRs-based memories may open up a new strategy toward developing high-performance optoelectronic devices.

中文翻译：

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基于核-壳纳米棒的光学存储单元的局部表面等离子共振介导的电荷俘获/去俘获

为了遵循摩尔定律的小型化趋势，已经做出了更大的努力来开发具有用于物联网（IoT）的多功能功能的单个设备。在这项工作中，已经提出了具有出色的双重光电功能的有机光学存储器件，包括光感测和数据存储。基于Au @ Ag核壳纳米棒（NRs）的存储设备由于可控制的Au @ Ag NRs的形态具有最佳尺寸和浓度，因此具有高达19.7 V的大存储窗口。此外，由于Au @ Ag NRs的消光强度随着Ag壳厚度的增加而逐渐增强，因此通过改变Ag壳的厚度来系统地研究存储器件的光可调性能。灯光助手可以实现多级数据存储。最后，仿真结果表明，光可调记忆特性源自Au @ Ag NRs的多模局部表面等离子体激元共振（LSPR），与实验结果相吻合。基于Au @ Ag核壳的NRs存储器可能会为开发高性能光电器件开辟新的战略。