Bioinspired Ionochromic Neuromorphic Transistors for Robotic Intelligent Perception

Intelligent perception with closed-loop information acquisition, processing, and feedback is critical for humanoid robots and embodied intelligence systems. Ionochromic transistors hold great potential for on-site signal processing and visual feedback. Here, we report a bioinspired ionochromic neuromorphic device with integrated signal-processing capabilities for intelligent perception and display. The transistor unit consisting of poly(3-hexylthiophene) (P3HT) and [EMIM][TFSI] (1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) ion gel, achieves synchronous conductance modulation and reversible color change via voltage-controlled ion doping effects, mimicking biological synaptic response, and color regulation in chameleons. This dual-functional behavior originates from the generation of polarons/bipolarons that reconfigure the P3HT energy levels and modify optical transitions. The device exhibits a high-contrast electrochromic transition, with absorbance at 520 nm decreasing from 36.3% to 18.9%. Furthermore, a uniform electrolyte-gated transistors array enables tactile signal visualization, verified by a visual Morse code system and robotic hand integration, realizing in situ tactile perception and accurate object recognition. This work provides an alternative solution for integrated intelligent perception, advancing the development of next-generation human-machine interaction (HMI) platforms.