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以视网膜为灵感的有机神经形态视觉传感器,具有极性调制,用于解码光信息

Ting Jiang^1,2, Yiru Wang³, Wanxin Huang³

¹Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, Institute of Molecular Aggregation Science, Tianjin University, 300072, Tianjin, China.

Light, science & applications

|November 6, 2023

概括

研究人员为神经形态视觉传感器 (NeuVS) 的聚合物介电物引入了碳素基. 这提高了电荷传输和光学性能,从而产生了高性能有机场效应晶体管 (OFET) 设备,具有改进的图像传感和低功耗.

科学领域:

材料科学材料科学材料科学
电子电子电子电子电子电子电子
光电学是指光电子产品.

背景情况:

基于有机场效应晶体管 (OFET) 的神经形态视觉传感器 (NeuVS) 使用聚合物介电材料中的极性功能组 (PFG) 控制电荷载体.
在这些设备中,PFG调节充电传输的确切机制尚不清楚.

研究的目的:

调查使用PFG在基于OFET的NeuVS中的收费运输调制机制.
通过将特定的功能组战略性地纳入聚合物介电材料来提高NeuVS设备的性能.

主要方法:

在基于OFET的NeuVS制造的聚合物介电材料中引入碳酸基.
电荷载体运输特性和设备移动性的表征.
评估光学数字的优点和图像传感能力,包括灰度信号检测和记忆功能.

主要成果:

碳基在半导体/介电接口上诱导电荷转移,从而实现有效的载体传输.
在 -1 V 的低工作电压下,达到 20 cm2 V-1 s-1 的设备移动性.
碳基组的极性调节比没有碳基组的介电材料增加了光学功效的数量超过一个数量级.
在1.25 fJ/spike的低功耗下,通过52个灰度信号和内存功能,证明了改进的图像传感.

结论:

这项研究阐明了碳酸基在增强基于OFET的NeuVS中的电荷传输和性能方面的作用.
结果为设计高级神经形态视觉应用的高性能聚合物介电物提供了洞察力.
开发的NeuVS在低功耗,高保真度的图像传感和信息解码方面表现出极好的潜力.

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