Optoelectronic memristor with light as an additional stimulus is generating interest in various remarkable optical‐electrical‐coupled applications. Herein, an optoelectronic memristor with hybrid digital‐analog switching behavior is developed by incorporating carbon dots (CDs) into the polymethylmethacrylate and the polystyrene layers as charge trapping medium. The memristor exhibits tri‐stable digital switching behavior under electro‐optical programming and analog switching behavior under optical programming. For the digital switching, the SET and RESET voltage of the memristor can be modulated through UV light illumination. Taking advantage of the cooperation of electrical and light stimuli, new ternary optoelectronic logic algorithm implementations with all‐electric or all‐optical signals as inputs are proposed. For the analog switching, the device resistance can be gradually modulated through UV light illumination and output intensity‐ and duration‐dependent characteristics. These features endow the memristor with fused image sensing‐and‐memory (sen‐memory) capability without an auxiliary bias. In addition, the sen‐memory can perform image contrast enhancement operation as the preprocessing operation of the human retina, which can improve the subsequent image recognition rate in the processing tasks. The multifunctional memristor highlights the potential for ternary optoelectronic computing and artificial vision applications, and also, is expected to expand the application scopes of CDs.

中文翻译：

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基于碳点的数模集成光电存储器，用于三元光电逻辑和传感存储器应用


以光为额外刺激的光电忆阻器正在引起人们对各种卓越的光-电-耦合应用的兴趣。在此，通过将碳点 （CD） 掺入聚甲基丙烯酸甲酯和聚苯乙烯层作为电荷捕获介质，开发了一种具有混合数模开关行为的光电忆阻器。忆阻器在电光编程下表现出三稳态数字开关行为，在光编程下表现出模拟开关行为。对于数字开关，忆阻器的 SET 和 RESET 电压可以通过紫外光照明进行调制。利用电刺激和光刺激的配合，提出了以全电或全光信号作为输入的新型三元光电逻辑算法实现。对于模拟开关，可以通过紫外光照明和输出强度和持续时间相关特性逐渐调制器件电阻。这些特性赋予忆阻器融合图像传感和记忆 （sen-memory） 功能，而不会产生辅助偏置。此外，传感器存储器可以执行图像对比度增强操作，作为人类视网膜的预处理操作，可以提高后续处理任务中的图像识别率。多功能忆阻器凸显了三元光电计算和人工视觉应用的潜力，有望扩大 CD 的应用范围。