National & Local United Engineering Laboratory of Flat Panel Display Technology, Fuzhou University, Fuzhou 350108, P. R. China.
Mindu Innovation Laboratory, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, P. R. China.
ACS Appl Mater Interfaces. 2021 Oct 13;13(40):47807-47816. doi: 10.1021/acsami.1c11866. Epub 2021 Sep 28.
Sensory adaptation is an essential function for humans to live on the earth. Herein, a hybrid synaptic phototransistor based on the mixed-halide perovskite/organic semiconductor film is reported. This hybrid phototransistor achieves photosensitive performance including a high photoresponsivity over 4 × 10 A/W and an excellent specific detectivity of 2.8 × 10 Jones. Due to the photoinduced halide-ion segregation of the mixed-halide perovskites and their slow recovery properties, the experience-history-dependent sensory adaptation behavior can be mimicked. Moreover, the light pulse width, intensity, light wavelength, and gate bias can be used to regulate the adaptation processes to improve its adaptability and perceptibility in different environments. The CsPbBrI/organic semiconductor hybrid films produced by spin coating are beneficial to large-scale fabrication. This study fabricates a novel solution-processable light-stimulated synapse based on inorganic perovskites for mimicking the human sensory adaptation that makes it possible to approach artificial neural sensory systems.
感觉适应是人类在地球上生存的基本功能。在此，报道了一种基于混合卤化物钙钛矿/有机半导体薄膜的混合突触光电晶体管。这种混合光电晶体管实现了包括超过 4×10^A/W 的高光响应率和 2.8×10^10 Jones 的优异特定探测率在内的光敏性能。由于混合卤化物钙钛矿的光致卤化物离子分离及其缓慢的恢复特性，可以模拟出依赖经验历史的感觉适应行为。此外，可以使用光脉冲宽度、强度、光波长和栅极偏压来调节适应过程，以提高其在不同环境中的适应性和可感知性。通过旋涂制备的 CsPbBrI/有机半导体混合薄膜有利于大规模制造。本研究制备了一种基于无机钙钛矿的新型溶液处理光刺激突触，用于模拟人类感觉适应，这使得接近人工神经网络感觉系统成为可能。
