Abstract
We demonstrate low-voltage, flexible, transparent pentacene humidity sensors with ultrahigh sensitivity, good reliability, and fast response/recovery behavior. The excellent performances of these devices are derived from an inserted polyelectrolyte (poly[2-(methacryloyloxy)ethyltrimethylammonium chloride-co-3-(trimethoxysilyl)propyl methacrylate] (poly(METAC-co-TSPM)) interlayer, which releases free Cl - ions in the electrolyte dielectric layer under humid conditions and boosts the electrical current in the transistor channel. This has led to extreme device sensitivity, such that electrical signal variations exceeding 7 orders of magnitude have been achieved in response to a 15% change in the relative humidity level. The new sensors exhibit a fast responsivity and a stable performance toward changes in humidity levels. Furthermore, the humidity sensors, mounted on flexible substrates, provided low voltage (<5 V) operation while preserving the unique ultrasensitivity and fast responsivity of these devices. We believe that the strategy of utilizing the enhanced ion motion in an inserted polyelectrolyte layer of an OFET structure can potentially improve sensor technologies beyond humidity-responsive systems.
| Original language | English |
|---|---|
| Pages (from-to) | 8591-8596 |
| Number of pages | 6 |
| Journal | ACS Applied Materials and Interfaces |
| Volume | 5 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - 2013 Sep 11 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
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Polyelectrolyte interlayer for ultra-sensitive organic transistor humidity sensors. / Park, Yeong Don; Kang, Boseok; Lim, Ho Sun; Cho, Kilwon; Kang, Moon Sung; Cho, Jeong Ho.
In: ACS Applied Materials and Interfaces, Vol. 5, No. 17, 11.09.2013, p. 8591-8596.Research output: Contribution to journal › Article
TY - JOUR
T1 - Polyelectrolyte interlayer for ultra-sensitive organic transistor humidity sensors
AU - Park, Yeong Don
AU - Kang, Boseok
AU - Lim, Ho Sun
AU - Cho, Kilwon
AU - Kang, Moon Sung
AU - Cho, Jeong Ho
PY - 2013/9/11
Y1 - 2013/9/11
N2 - We demonstrate low-voltage, flexible, transparent pentacene humidity sensors with ultrahigh sensitivity, good reliability, and fast response/recovery behavior. The excellent performances of these devices are derived from an inserted polyelectrolyte (poly[2-(methacryloyloxy)ethyltrimethylammonium chloride-co-3-(trimethoxysilyl)propyl methacrylate] (poly(METAC-co-TSPM)) interlayer, which releases free Cl - ions in the electrolyte dielectric layer under humid conditions and boosts the electrical current in the transistor channel. This has led to extreme device sensitivity, such that electrical signal variations exceeding 7 orders of magnitude have been achieved in response to a 15% change in the relative humidity level. The new sensors exhibit a fast responsivity and a stable performance toward changes in humidity levels. Furthermore, the humidity sensors, mounted on flexible substrates, provided low voltage (<5 V) operation while preserving the unique ultrasensitivity and fast responsivity of these devices. We believe that the strategy of utilizing the enhanced ion motion in an inserted polyelectrolyte layer of an OFET structure can potentially improve sensor technologies beyond humidity-responsive systems.
AB - We demonstrate low-voltage, flexible, transparent pentacene humidity sensors with ultrahigh sensitivity, good reliability, and fast response/recovery behavior. The excellent performances of these devices are derived from an inserted polyelectrolyte (poly[2-(methacryloyloxy)ethyltrimethylammonium chloride-co-3-(trimethoxysilyl)propyl methacrylate] (poly(METAC-co-TSPM)) interlayer, which releases free Cl - ions in the electrolyte dielectric layer under humid conditions and boosts the electrical current in the transistor channel. This has led to extreme device sensitivity, such that electrical signal variations exceeding 7 orders of magnitude have been achieved in response to a 15% change in the relative humidity level. The new sensors exhibit a fast responsivity and a stable performance toward changes in humidity levels. Furthermore, the humidity sensors, mounted on flexible substrates, provided low voltage (<5 V) operation while preserving the unique ultrasensitivity and fast responsivity of these devices. We believe that the strategy of utilizing the enhanced ion motion in an inserted polyelectrolyte layer of an OFET structure can potentially improve sensor technologies beyond humidity-responsive systems.
UR - http://www.scopus.com/inward/record.url?scp=84884238043&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84884238043&partnerID=8YFLogxK
U2 - 10.1021/am402050p
DO - 10.1021/am402050p
M3 - Article
C2 - 23937407
AN - SCOPUS:84884238043
VL - 5
SP - 8591
EP - 8596
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 17
ER -