Supercapacitively Liquid‐Solid Dual‐State Optoelectronics

• DOI: 10.1002/adma.202406345
• Publication Date: 2024-09-09T07:46:21Z
• Authors: Qianying Guo; Daizong Ji; Qiankun Wang; Lan Peng; Cong Zhang; Yungen Wu; Derong Kong; Shi Luo; Wentao Liu; Gang Chen; Dapeng Wei; Yunqi Liu; Dacheng Wei
• Keywords: Photocurrent; Photodiode

Abstract Photo‐transduction of solid‐state optoelectronics occurs in semiconductors or their interfaces. Considering the confined active area and interfacial capacitance materials, faces inherent limitations photo‐transduction, especially for bionic vision, performance is lower than that living systems. For example, a photoreceptor generates pA‐level photocurrent when absorbing single photon. Here, liquid‐solid dual‐state phototransistor demonstrated, which photo‐transduction modulation take place at microporous interface between water, mimicking principles photoreceptor. When operating an orderly stacked photo‐harvesting covalent organic framework layer supercapacitively photogating channel conductivity via interface, achieving responsivity 4.6 × 10 A W −1 detectivity 1.62 16 Jones room temperature, several orders magnitude higher other photodetectors. Such bio‐inspired enables high‐contrast scotopic neuromorphic imaging with greater photoreceptors, holding promise constructing optoelectronic systems beyond conventional optoelectronics.