Negative Photoconductivity Transistors for Visuomorphic Computing,Advanced Materials

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Negative Photoconductivity Transistors for Visuomorphic Computing
Advanced Materials ( IF 27.4 ) Pub Date : 2024-07-23 , DOI: 10.1002/adma.202403538
Le Wang ₁ , Haotian Wang ₁ , Jing Liu ₁ , Yiru Wang ₁ , He Shao ₁ , Wen Li ₁ , Mingdong Yi ₁ , Haifeng Ling ₁ , Linghai Xie ₁ , Wei Huang _{1,

2}

Affiliation

Visuomorphic computing aims to simulate and potentially surpass the human retina by mimicking biological visual perception with an artificial retina. Despite significant progress, challenges persist in perceiving complex interactive environments. Negative photoconductivity transistors (NPTs) mimic synaptic behavior by achieving adjustable positive photoconductivity (PPC) and negative photoconductivity (NPC), simulating “excitation” and “inhibition” akin to sensory cell signals. In complex interactive environments, NPTs are desired for visuomorphic computing that can achieve a better sense of information, lower power consumption, and reduce hardware complexity. In this review, it is started by introducing the development process of NPTs, while placing a strong emphasis on the device structures, working mechanisms, and key performance parameters. The common material systems employed in NPTs based on their functions are then summarized. Moreover, it is proceeded to summarize the noteworthy applications of NPTs in optoelectronic devices, including advanced multibit nonvolatile memory, optoelectronic logic gates, optical encryption, and visual perception. Finally, the challenges and prospects that lie ahead in the ongoing development of NPTs are addressed, offering valuable insights into their applications in optoelectronics and a comprehensive understanding of their significance.

中文翻译：

用于可视化计算的负光电导晶体管

视觉拟态计算旨在通过人工视网膜模仿生物视觉感知来模拟并可能超越人类视网膜。尽管取得了重大进展，但在感知复杂的交互环境方面仍然存在挑战。负光电导晶体管（NPT）通过实现可调节的正光电导（PPC）和负光电导（NPC）来模拟突触行为，模拟类似于感觉细胞信号的“兴奋”和“抑制”。在复杂的交互环境中，NPT是视觉拟态计算所需要的，它可以实现更好的信息感知、更低的功耗、降低硬件复杂度。本文首先介绍了NPT的发展历程，重点介绍了其装置结构、工作机制和关键性能参数。然后根据其功能总结了 NPT 中采用的常见材料系统。此外，还总结了NPT在光电器件中值得注意的应用，包括先进的多位非易失性存储器、光电逻辑门、光学加密和视觉感知。最后，讨论了 NPT 持续发展中面临的挑战和前景，为其在光电领域的应用提供了宝贵的见解，并全面了解了其重要性。

更新日期：2024-07-23

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