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Mimicking Sensory Adaptation with Dielectric Engineered Organic Transistors
Author(s) -
Shen Hongguang,
He Zihan,
Jin Wenlong,
Xiang Lanyi,
Zhao Wenrui,
Di Chongan,
Zhu Daoben
Publication year - 2019
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201905018
Subject(s) - materials science , transistor , sensory adaptation , gating , dielectric , optoelectronics , electrical conductor , nanotechnology , adaptation (eye) , electromagnetic shielding , electronic circuit , sensory system , voltage , electrical engineering , physiology , psychology , physics , optics , composite material , cognitive psychology , biology , engineering
Mimicking sensory adaptation with transistors is essential for developing next‐generation smart circuits. A key challenge is how to obtain controllable and reversible short‐term signal decay while simultaneously maintaining long‐term electrical stability. By introducing a buried dynamic‐trapping interface within the dielectric layer, an organic adaptive transistor (OAT) with sensory adaptation functionality is developed. The device induces self‐adaptive interfacial trapping to enable volatile shielding of the gating field, thereby leading to rapid and temporary carrier concentration decay in the conductive channel without diminishing the mobility upon a fixed voltage bias. More importantly, the device exhibits a fine‐tuned decay constant ranging from 50 ms to 5 s, accurately matching the adaptation timescales in bio‐systems. This not only suggests promising applications of OATs in flexible artificial intelligent elements, but also provides a strategy for engineering organic devices toward novel biomimetic functions.