Jiang Longlong, Huang Hua, Zhang Can, Yuan Ye, Wang Xiaohong, Qiu Longzhen
National Engineering Lab of Special Display Technology, State Key Lab of Advanced Display Technology, Academy of Opto-Electronic Technology, Hefei University of Technology, Hefei230009, China.
Intelligent Interconnected Systems Laboratory of Anhui, Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, School of Instrument Science and Optoelectronic Engineering, Hefei University of Technology, Hefei230009, China.
ACS Appl Mater Interfaces. 2023 Feb 8;15(5):7227-7235. doi: 10.1021/acsami.2c22223. Epub 2023 Jan 26.
Flexible synaptic devices with information sensing, processing, and storage functions are indispensable in the development of wearable artificial intelligence electronic systems. Here, a semiconductor/dielectric bilayer structure was prepared by a one-step deposition method and used for the first time in a flexible biomimetic photonic synaptic transistor device. Specifically, poly(3-hexylthiophene)--poly(phenyl isocyanide) with pentafluorophenyl ester (P3HT--PPI(5F)) was prepared as the device active layer, where the P3HT segment served as a carrier transport channel and optical gate and the PPI(5F) segment was used for charge trapping. Various biomimetic synaptic behaviors, such as excitatory postsynaptic currents, paired-pulse facilitation, and short-term/long-term memory, were successfully simulated under green light stimulation. An ultra-low energy consumption of 1.82 fJ was achieved with a greatly reduced operating voltage. Further, the "Morse-code" optical decoding was simulated using the excellent synaptic plasticity of the device. In addition, flexible synaptic devices were prepared by a one-step deposition method and can be well-affixed to arbitrary substrates. This has promising applications in the field of wearable bionic electronics.
具有信息传感、处理和存储功能的柔性突触器件在可穿戴人工智能电子系统的发展中不可或缺。在此，通过一步沉积法制备了一种半导体/电介质双层结构，并首次将其用于柔性仿生光子突触晶体管器件。具体而言，制备了带有五氟苯基酯的聚（3 - 己基噻吩）-聚（苯基异氰化物）（P3HT - PPI(5F)）作为器件有源层，其中P3HT段用作载流子传输通道和光门，PPI(5F)段用于电荷俘获。在绿光刺激下成功模拟了各种仿生突触行为，如兴奋性突触后电流、双脉冲易化和短期/长期记忆。在大幅降低工作电压的情况下实现了1.82 fJ的超低能耗。此外，利用该器件优异的突触可塑性模拟了“莫尔斯电码”光学解码。另外，通过一步沉积法制备的柔性突触器件能够很好地附着在任意基板上。这在可穿戴仿生电子领域具有广阔的应用前景。
