Discovery of a New Odour Sensing Mechanism Using an n-Type Organic Transistor

Authors: Hague, Lee; Puzzovio, Delia; Richardson, Tim H.; Grell, Martin

Source: Sensor Letters, Volume 9, Number 5, October 2011 , pp. 1692-1696(5)

Publisher: American Scientific Publishers

Buy & download fulltext article:

OR

Price: $113.00 plus tax (Refund Policy)

Abstract:

For the first time, we have demonstrated an n-type organic thin film transistor (OTFT) odour sensor. A systematic comparison of a PDI8-CN2 n-type OTFT with an otherwise identical p-type OTFT reveals significant differences between their responses under octylamine odours. While the p-type OTFT displays the common decrease of saturated drain current, the observed drain current in the n-type OTFT increases significantly. We find both, an increase in carrier mobility, and off-current, under exposure. This is consistently explained by reductive doping of the n-type semiconductor with the Lewis base, octylamine. Since this is uniquely accessible to n-type organic semiconductors, we open up a new interaction window for OTFT odour sensing. The increase of drain current will make Lewis bases stand out from interferants. The observation of doping in an n-type organic semiconductor may be the first step towards n-type synthetic metals, mirroring the common synthetic metals, which use doped p-type organic semiconductors.

Keywords: AMINE; DOPING; N-TYPE; ODOUR; ORGANIC THIN FILM TRANSISTOR (OTFT); PDI8-CN2; SENSOR

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2011.1734

Publication date: October 1, 2011

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • ingentaconnect is not responsible for the content or availability of external websites
Related content

Tools

Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page