Liao Changrong, Liu Dong, Liu Zheng, Wang Jinchengyan, Xie Xuesen, Li Jie, Zhou Guangdong
School of Electronic Information and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160, People's Republic of China.
School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
J Phys Chem Lett. 2024 Jun 13;15(23):6230-6236. doi: 10.1021/acs.jpclett.4c01071. Epub 2024 Jun 5.
A bioinspired in-sensing computing paradigm using emerging photoelectronic memristors pursues multifunctionality with low power consumption and high efficiency for processing large amounts of sensing information. An organic semiconductor memristor strategy based on the CuPc functional layer integrates a negative photoconductance (NPC) effect and an analogue switching memory (ASM) effect in the same pixel. The NPC effect, present in the pure capacitance state at low bias voltage, provides high-performance short/long-term synaptic plasticity modulable by light pulse parameters. The interface charge effect along with defeat site trapping and detrapping is responsible for the pure capacitance effect and the NPC effect, with electron tunneling and electric-field-driven band dynamics responsible for ASM. This work reveals an organic memristor approach for hardware implementation of a neuromorphic vision computing system, emulating retinal bipolar cells via light-dominated NPC and electrically induced ASM with stable, tunable conductance states.
一种使用新兴光电子忆阻器的受生物启发的内感测计算范式追求多功能性，具有低功耗和高效率，可处理大量传感信息。基于CuPc功能层的有机半导体忆阻器策略在同一像素中集成了负光电导（NPC）效应和模拟开关记忆（ASM）效应。NPC效应在低偏置电压下的纯电容状态中存在，提供了可通过光脉冲参数调制的高性能短期/长期突触可塑性。界面电荷效应以及缺陷位点的俘获和去俘获导致了纯电容效应和NPC效应，而电子隧穿和电场驱动的能带动力学则导致了ASM效应。这项工作揭示了一种用于神经形态视觉计算系统硬件实现的有机忆阻器方法，通过以光为主导的NPC和具有稳定、可调电导状态的电诱导ASM来模拟视网膜双极细胞。
