Paper Title:
The Investigation of a New NO2 OTFT Sensor Based on Heterojunction F16CuPc/CuPc Thin Films
  Abstract

The bottom contact heterojunction organic thin film transistors (OTFTs) based on n-type hexadecafluorophthalocyaninatocopper (F16CuPc) and p-type copper phthalocyanine (CuPc) bilayer were developed by the vacuum evaporation, which were applied to detect nitrogen dioxide (NO2). The sensors with different thickness (5nm, 10nm, 15nm and 20nm) of CuPc were prepared to investigate the influence of CuPc film thickness on the properties of devices. The results showed that four parameters including the source-drain current (IDS), grid current (IGS), threshold voltage (VT) and carrier mobility (μ) changed in a few seconds when the sensors were exposed to the atmosphere of NO2. Further more, IDS and IGS presented extremely similar variation trend. So the grid current would be taken as a new parameter to reveal the response characteristic of OTFT gas sensor. By comparison, the device with 15nm CuPc thin film exhibited the optimum electronic and gas sensing properties.

  Info
Periodical
Chapter
Chapter 1: Novel and Advanced Materials, Materials Science and Technologies
Edited by
Qingzhou Xu
Pages
159-163
DOI
10.4028/www.scientific.net/AMR.721.159
Citation
B. Zhang, H. L. Tai, G. Z. Xie, X. Li, H. N. Zhang, "The Investigation of a New NO2 OTFT Sensor Based on Heterojunction F16CuPc/CuPc Thin Films", Advanced Materials Research, Vol. 721, pp. 159-163, 2013
Online since
July 2013
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$32.00
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