Li Na, Wang Qinqin, He Congli, Li Jiawei, Li Xiuzhen, Shen Cheng, Huang Biying, Tang Jian, Yu Hua, Wang Shuopei, Du Luojun, Yang Wei, Yang Rong, Shi Dongxia, Zhang Guangyu
Songshan Lake Materials Laboratory, Dongguan 523808, People's Republic of China.
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
ACS Nano. 2023 Jan 6. doi: 10.1021/acsnano.2c06921.
Artificial retina implantation provides an effective and feasible attempt for vision recovery in addition to retinal transplantation. The most advanced artificial retinas ever developed based on silicon technology are rigid and thus less compatible with the biosystem. Here we demonstrate flexible photoresponsive ring oscillators (PROs) based on the 2D semiconductor MoS for artificial retinas. Under natural light illuminations, arrayed PROs on flexible substrates serving as vision pixels can efficiently output light-intensity-dependent electrical pulses that are processable and transmittable in the human visual nerve system. Such PROs can work under low supply voltages below 1 V with a record-low power consumption, e.g. only 12.4 nW at a light intensity of 10 mW/cm, decreased by ∼500 times compared with that of the state-of-the-art silicon devices. Such flexible artificial retinas with a simple device structure, high light-to-signal conversion efficiency, ultralow power consumption, and high tunability provide an alternative prosthesis for further clinical trials.
除视网膜移植外，人工视网膜植入为视力恢复提供了一种有效且可行的尝试。基于硅技术开发的最先进的人工视网膜是刚性的，因此与生物系统的兼容性较差。在此，我们展示了基于二维半导体二硫化钼（MoS）的用于人工视网膜的柔性光响应环形振荡器（PROs）。在自然光照射下，柔性基板上用作视觉像素的阵列式PROs能够高效输出与光强度相关的电脉冲，这些脉冲在人类视觉神经系统中是可处理和可传输的。这种PROs可以在低于1 V的低电源电压下工作，功耗创历史新低，例如在光强度为10 mW/cm²时仅为12.4 nW，与最先进的硅器件相比降低了约500倍。这种具有简单器件结构、高光信号转换效率、超低功耗和高可调性的柔性人工视网膜为进一步的临床试验提供了一种替代假体。
