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Highly Robust Flexible Ferroelectric Field Effect Transistors Operable at High Temperature with Low‐Power Consumption
Author(s) -
Ren Chuanlai,
Zhong Gaokuo,
Xiao Qun,
Tan Congbing,
Feng Ming,
Zhong Xiangli,
An Feng,
Wang Jinbin,
Zi Mengfei,
Tang Mingkai,
Tang Yong,
Jia Tingting,
Li Jiangyu
Publication year - 2020
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201906131
Subject(s) - materials science , ferroelectricity , optoelectronics , bend radius , flexible electronics , heterojunction , field effect transistor , transistor , nanotechnology , bending , voltage , electrical engineering , composite material , dielectric , engineering
Abstract Flexible ferroelectric field effect transistors (FeFETs) with multiple functionalities and tunable properties are attractive for low power sensing, nonvolatile data storage, as well as emerging memristor applications such as artificial synapses, though the state‐of‐art flexible FeFETs based on organic materials possess low polarization, large coercivity, and high operating voltage, and suffer from poor thermal stability. Here, developed is an all‐inorganic flexible FeFET based on epitaxial Pb(Zr 0.1 Ti 0.9 )O 3 /ZnO heterostructure on a mica substrate, which not only operates under a small voltage (±6 V) and thus consumes low power with an excellent on/off ratio of 10 4 as well as retention characteristics, but also shows robust FeFET performance under large bending deformation (4 mm), extended bending cycling (500 cycles), and high temperature operation at 200 °C. Importantly, the FeFET characteristics depend on temperature, but not on temperature history, critical for operation under repeated thermal loading. The excellent mechanical flexibility and functional robustness of the flexible FeFET originate from the unique van der Waals bonded layer structure of mica, facilitating a small bending radius yet modest strain. This work demonstrates the great promise of mica as a universal platform to integrate complicated functional devices for flexible electronics, especially under harsh environment.