Mixed-Halide Perovskite Film-Based Neuromorphic Phototransistors for Mimicking Experience-History-Dependent Sensory Adaptation

• Published in: ACS applied materials & interfaces Vol. 13; no. 40; pp. 47807 - 47816
• Main Authors: Liu, Jiahui, Shen, Zihong, Ye, Yuliang, Yang, Zunxian, Gong, Zhipeng, Ye, Bingqing, Qiu, Yinglin, Huang, Qiaocan, Xu, Lei, Zhou, Yuanqing, Wu, Wenbo, Li, Fushan, Guo, Tailiang
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 13.10.2021
• Subjects: Adaptation, Physiological; Biomimetic Materials - chemistry; Biomimetics - instrumentation; Biomimetics - methods; Bromides - chemistry; Bromides - radiation effects; Cesium - chemistry; Cesium - radiation effects; Iodides - chemistry; Iodides - radiation effects; Lead - chemistry; Lead - radiation effects; Light; Organic Electronic Devices; Organosilicon Compounds - chemistry; Polystyrenes - chemistry; Semiconductors; Transistors, Electronic; perovskites; solution processes; organic semiconductors; sensory adaptation; experience history; hybrid synaptic phototransistors
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.1c11866

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 × 103 A/W and an excellent specific detectivity of 2.8 × 1016 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 CsPbBr x I3–x /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.