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Highly Stable Organic Transistors on Paper Enabled by a Simple and Universal Surface Planarization Method
Author(s) -
Shin Hyeonwoo,
Roh Jeongkyun,
Song Jiyoung,
Roh Heebum,
Kang ChanMo,
Lee Taesoo,
Park Gunbaek,
An Kunsik,
Kim Jun Young,
Kim Hyoseok,
Kwak Jeonghun,
Lee Changhee,
Kim Hyeok
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201801731
Subject(s) - materials science , chemical mechanical planarization , aramid , transistor , optoelectronics , surface roughness , substrate (aquarium) , field effect transistor , nanotechnology , threshold voltage , composite material , voltage , polishing , fiber , electrical engineering , geology , engineering , oceanography
In this work, operationally and mechanically stable organic field‐effect transistors (OFETs) are demonstrated on aramid fiber‐based paper enabled by a simple and universal surface planarization method. By employing a nanoimprint lithography‐inspired surface smoothening method, rough aramid paper is successfully smoothened from a scale of several tens of micrometers to a sub‐nanometer‐scale surface roughness. Owing to the sub‐nanometer‐scale surface roughness of the aramid paper, the OFETs fabricated on the aramid paper exhibit decent field‐effect mobility (0.25 cm 2 V −1 s −1 ) with a high current on‐to‐off ratio (>10 7 ), both of which are comparable with those of OFETs fabricated on rigid silicon substrates. Moreover, the OFETs fabricated on the aramid paper exhibit both high operational and mechanical stability; this is indicated by a bias‐stress‐induced threshold voltage shift (∆ V TH ≈ 4.27 V under an excessive gate bias stress of 1.7 MV cm −1 for 1 h 30 min) comparable to that of OFETs on a rigid silicon substrate, moderate field‐effect mobility, and a threshold voltage stability under 1000 bending cycles with a compressive strain of 1%. The demonstration of highly stable OFETs on paper enabled by the simple planarization method will expand the potential use of various types of paper in electronic applications.